Largest prehistoric animals
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The largest prehistoric organisms include both vertebrate and invertebrate species. Many are described below, along with their typical range of size (for the general dates of extinction, see the link to each). Many species mentioned might not actually be the largest representative of their clade due to the incompleteness of the fossil record and many of the sizes given are merely estimates since no complete specimen have been found. Their body mass, especially, is mostly conjecture because soft tissue was rarely fossilized. Generally the size of extinct species was subject to energetic and biomechanical constraints.
- 1 Vertebrates
- 1.1 Mammals (Mammalia)
- 1.1.1 Whales (Cetacea)
- 1.1.2 Even-toed ungulates (Artiodactyla)
- 1.1.3 Marsupials (Marsupialia)
- 1.1.4 Carnivores (Carnivora)
- 1.1.5 Armadillos, glyptodonts and pampatheres (Cingulata)
- 1.1.6 Hedgehogs, gymnures, shrews, and moles (Erinaceomorpha and Soricomorpha)
- 1.1.7 Rabbits, hares, and pikas (Lagomorpha)
- 1.1.8 Cimolestids (Cimolesta)
- 1.1.9 Odd-toed ungulates (Perissodactyla)
- 1.1.10 Anteaters and sloths (Pilosa)
- 1.1.11 Primates (Primata)
- 1.1.12 Elephants, mammoths, and mastodons (Proboscidea)
- 1.1.13 Rodents (Rodentia)
- 1.1.14 Astrapotherians (Astrapotheria)
- 1.1.15 Sirenians (Sirenia)
- 1.1.16 Arsinoitheres (Arsinoitheriidae)
- 1.1.17 Condylarths (Condylarthra)
- 1.1.18 Dinoceratans (Dinocerata)
- 1.1.19 Desmostylians (Desmostylia)
- 1.1.20 Litopterns (Litopterna)
- 1.1.21 Notoungulates (Notoungulata)
- 1.1.22 Oxyaenids (Oxyaenidae)
- 1.1.23 Hyaenodontids (Hyaenodontidae)
- 1.1.24 Mesonychids (Mesonychia)
- 1.2 Non-mammal synapsids (Synapsida)
- 1.3 Reptiles (Reptilia)
- 1.3.1 Crocodiles and relatives (Crocodylomorpha)
- 1.3.2 Lizards and snakes (Squamata)
- 1.3.3 Plesiosaurs
- 1.3.4 Ichthyosaurs (Ichthyosauria)
- 1.3.5 Turtles and tortoises (Testudines)
- 1.3.6 Pareiasaurs (Pareiasauridae)
- 1.3.7 Phytosaurs (Phytosauria)
- 1.3.8 Pterosaurs (Pterosauria)
- 1.4 Non-avian dinosaurs (Dinosauria)
- 1.5 Birds (Aves)
- 1.5.1 Waterfowl (Anseriformes)
- 1.5.2 Shorebirds (Charadriiformes)
- 1.5.3 Storks and allies (Ciconiiformes)
- 1.5.4 Pigeons (Columbiformes)
- 1.5.5 Hesperornithines (Hesperornithes)
- 1.5.6 Diatrymas (Gastornithiformes)
- 1.5.7 Teratorns (Teratornithidae)
- 1.5.8 Phorusrhacids (Phorusrhacidae)
- 1.5.9 Accipitriforms (Accipitriformes)
- 1.5.10 Gamebirds (Galliformes)
- 1.5.11 Songbirds (Passeriformes)
- 1.5.12 Cormorants and allies (Pelecaniformes)
- 1.5.13 Bony-toothed birds (Odontopterygiformes)
- 1.5.14 Woodpeckers and allies (Piciformes)
- 1.5.15 Parrots (Psittaciformes)
- 1.5.16 Penguins (Sphenisciformes)
- 1.5.17 Owls (Strigiformes)
- 1.6 Amphibians (Amphibia)
- 1.7 Bony fish (Osteichthyes)
- 1.8 Cartilaginous fish (Chondrichthyes)
- 1.1 Mammals (Mammalia)
- 2 Arthropods (Arthropoda)
- 2.1 Dinocaridida
- 2.2 Chelicerata
- 2.3 Myriapoda
- 2.4 Trilobitomorpha
- 2.5 Insects (Insecta)
- 3 Molluscs (Mollusca)
- 4 See also
- 5 References
The largest known fossil Odontocete ("toothed whale") was the Miocene physeteroid whale Livyatan melvillei which was estimated to be between 13.5 and 17.5 meters in length. One notable feature of L. melvillei was its teeth which could exceed 36 cm in length and were unmatched by any other animal, extinct or alive.
However, the largest known fossil whales were baleen whales from the Pliocene and Pleistocene Epochs. A notable example is the bones of a Pliocene age baleen whale, assigned the questionable name "Balaenoptera sibbaldina", which likely rivaled the modern blue whale in size.
Even-toed ungulates (Artiodactyla)
- The largest known artiodactyl was Hippopotamus gorgops with a length of 4.3 metres (14 feet) and a height of 2.1 metres (6.9 feet). Bison latifrons reached a shoulder height of 2.5 meters (8.2 feet), and had horns that spanned over 2 meters (6.6 feet). The largest extinct bovid is Aurochs (Bos primigenius) with an average height at the shoulders of 155–180 cm (61–71 in) in bulls and 135–155 cm (53–61 in) in cows, while aurochs populations in Hungary had bulls reaching 155–160 cm (61–63 in).
- The largest known camel that ever lived was the Syrian camel. It was 3 meters (9.8 feet) at the shoulder and 13 feet tall. Gigantocamelus and Titanotylopus from North America, both possibly reached 2,485.6 kg (5,480 lb) and a shoulder height of over 3.4 m (11 ft).
- Daeodon was the largest known entelodont that ever lived, at 12 ft long and 7 ft at the shoulder. The largest known wild suid to ever exist was Kubanochoerus gigas, having measured up to 550 kg (1,210 lb) and stood more than 1.3 m (4.3 ft) tall at the shoulder.
- The extinct Irish elk (Megaloceros giganteus) and the stag-moose (Cervalces scotti) were of similar or of slightly larger size than the Alaskan moose. However, the Irish elk could have antlers spanning up to 4.3 m (14 ft) across, about twice the maximum span for a moose's antlers. Cervalces latifrons was twice as heavy as the Irish elk but its antlers were smaller.
- The largest known extinct marsupial was Diprotodon, about 3 metres (9.8 ft) long, standing 2 metres (6.6 ft) tall and weighing up to 2,786 kg (6,142 lb).
- The two largest known carnivorous marsupials were the marsupial lion and Thylacosmilus (larger than the Tasmanian tiger), both about 6 ft (1.8 m) long and weighing 100–160 kilograms (220–350 lb). The largest known kangaroo ever was Procoptodon, which could grow to 3.0 m (10 ft) and weigh 230 kilograms (510 lb). Some species from the genus Sthenurus were similar in size as well.
- The largest palorchestids Palorchestes was almost as large as a horse, being around 2.5 metres (8.2 ft) in length with a weight of about 200 kilograms (440 lb), and had four powerful legs.
- The largest terrestrial known carnivoran and the largest known bear as well as the largest known mammalian land-predator of all time was Arctotherium angustidens of the genus Arctotherium or the South American short-faced bears. A humerus of A. angustidens from Buenos Aires indicate that the big males of this species would have weighed 1,588- 1,749 kg and standing at least 11 feet (3.4 meters) tall on the hind-limbs.
- The largest viverrid known to have existed is Viverra leakeyi, which was around the size of a wolf or small leopard at 41 kg (90 lb).
- The heaviest known felid ever was the Ngangdong tiger (Panthera tigris soloensis) with the largest specimen weighing up to 470 kg. Also the extinct American lion (Panthera leo atrox), weighing up to 420 kg (930 lb) and the saber-toothed cat Smilodon populator of which the largest males might have reached 470 kg (1,040 lb).
- The largest wolf is the dire wolf (Canis dirus) 1.5 m (4.9 ft) in length and weighed between 50 and 110 kg (110 and 243 lb). The largest canid of all time was Epicyon haydeni, which stood 37 inches (0.94 meters) tall at the shoulder. The largest bear-dog was a species of Pseudocyon weighing around 773 kg, representing a very large individual.
- The largest known mustelid to ever exist was likely the giant otter, Enhydriodon. It exceeded 3 m (9.8 ft) in length, and would have weighed in at around 200 kg (440 lb), much larger than any known mustelid, living or extinct. There were other giant otters, like Siamogale, at around 50 kg (110 lb) and Megalenhydris, which was larger than a modern day Giant River Otter. Another large-bodied mustelid was the superficially cat-like Ekorus from Africa, about the size of a leopard and filling a similar ecological niche before big cats came to the continent. Megalictis was thought to be around the size of a black bear according to old estimates. Newer estimates, however, significantly downgrade its size, although, at a maximum weight more than twice that of a wolverine, it is larger than most (if not all) living mustelids.
- The largest known fossil hyena is the lion-sized Pachycrocuta, estimated at 190 kg (420 lb). The closely related percrocutid feliform, Dinocrocuta, was even bigger, 240 kg (530 lb), which would make it heavier than a Siberian tiger.
Hedgehogs, gymnures, shrews, and moles (Erinaceomorpha and Soricomorpha)
Rabbits, hares, and pikas (Lagomorpha)
Odd-toed ungulates (Perissodactyla)
- The largest known perissodactyl, and the second largest land mammal, of all time was Indricotherium. The largest individual known was estimated at 4.8 m (15.7 ft) tall at the shoulders, 8.0 m (26.2 ft) in length from nose to rump, and 16–17 t (17.6–18.7 tons) in weight.
- Some prehistoric horned rhinos also grew to large sizes. The giant woolly rhino Elasmotherium reached 19.7 ft long and 6.6 ft high. The largest prehistoric horse was Equus giganteus of North America. It was estimated to grow to more than 1250 kg and 2 m at the shoulders.
- The largest known pilosan ever was Megatherium, a ground sloth with an estimated average weight of 5 tonnes (5.5 tons) and a height of 4 m (13 ft), which is about the same size as the African bush elephant. Several other sloths grew to large sizes as well, such as Eremotherium, but none as large as Megatherium.
- The largest known primate of all time was Gigantopithecus blackii, standing 3 m (9.8 ft) tall and weighing 540 kilograms (1,200 lb).
- The largest known old world monkey, the prehistoric baboon Dinopithecus grew even larger than modern Mandrills, weighing as much as a grown man.
- Some prehistoric prosimians grew to huge sizes as well. Archaeoindris was a 1.5 meter long lemur that lived in Madagascar and weighed 200 kg, more than a silverback gorilla. Megaladapis is another large extinct lemur at 1.3 to 1.5 m (4.3 to 4.9 ft) in length.
Elephants, mammoths, and mastodons (Proboscidea)
- The largest known land mammal ever was a proboscidean called Palaeoloxodon namadicus which weighed about 22 tonnes (24.3 short tons), and was about 5.2 metres (17.1 feet) tall at the shoulder. The largest individuals of the steppe mammoth of Eurasia (Mammuthus trogontherii) estimated to reach 4.5 metres (14.8 ft) at the shoulders and 14.3 tonnes (15.8 short tons) in weight.
- Some other enormous proboscideans include the southern mammoth (Mammuthus meridionalis), the imperial mammoth (Mammuthus imperator), and Deinotherium.
- Josephoartigasia monesi was the largest known rodent of all time, approximately 3 metres (9.8 feet) long and 1.5 metres (4.9 feet) tall and weighing an estimated 1 tonne.
- Before the discovery of Josephoartigasia monesi, another giant rodent was known, Phoberomys insolita, but it was known from only a few fragments, so its real size is unknown. A slightly smaller relative, Phoberomys pattersoni, was found, which was 3 m (9.8 ft) long and weighed 320 kilograms (700 lb).
- The largest beaver was the giant beaver of North America. It grew over 8 ft (2.4 m) in length and weighed roughly 60 to 100 kg (130 to 220 lb), also making it one of the largest rodents to ever exist.
- The largest known prehistoric sirenian was Steller's sea cow at 8–9 m long (26–30 ft).
- Another contender was Rytiodus which was 6 m (20 ft) long. It was about twice the size as modern sirenians.
The largest known condylarth is Phenacodus. It was 1.5 m (4.9 ft) long and weighted up to 56 kg,
The largest notoungulate known of complete remains is Toxodon. It was about 2.7 metres (8.9 feet) in body length, and about 1.5 metres (4.9 feet) high at the shoulder and resembled a heavy rhinoceros. Although is not complete, the preserved fossils suggests that Mixotoxodon were the most massive member of the group, with a weight about 3.8 tonnes.
The plant-eating dinocephalian Tapinocephalus probably was the largest known of all non-mammal synapsids, at 4 meters (13 feet) and 2,000 kg (4,400 lb). Among the largest carnivorous synapsids was the therapsid Anteosaurus, which was 5–6 meters (16–20 feet) long, and weighed 500–600 kg (1,100–1,300 lb).
Crocodiles and relatives (Crocodylomorpha)
- The largest known crocodylomorph is likely Sarcosuchus imperator at 12 metres (39 ft) long and weighing 8 tonnes.
- Some close contenders in size are Deinosuchus estimated at around 12 metres (39 ft), and Purussaurus estimated at 11–13 metres (36–43 ft) in length. Another large crocodilian is Rhamphosuchus, estimated at 8–11 metres (26–36 ft) in length.
- The largest terrestrial sebecid crocodylomorph is Barinasuchus, from the Miocene of South America, which reached 9 m (30 ft) long.
- The largest known rauisuchian is Fasolasuchus tenax, which measured an estimated 8–10 meters. It is both the largest rauisuchian known to science, and the largest non-dinosaurian terrestrial predator ever discovered.
- Giant mosasaurs are the largest known animals within this group. The largest known mosasaur is likely Mosasaurus hoffmanni, estimated at 17.6 metres (58 ft) in length. Another giant mosasaur is Tylosaurus, estimated at 10–14 metres (33–46 ft) in length.
Another large mosasaur is Hainosaurus bernardi (could be synonymous to Tylosaurus). It was once estimated at 17 and 15 metres (49 ft) in length, but later estimates put it at around 12.2 meters.
- The largest known prehistoric snake is Titanoboa cerrejonensis, estimated at 12.8 m (42 ft) in length and 1135 kg in weight. Another known very large fossil snake is Gigantophis garstini, estimated at around 9.3–10.7 metres (31–35 ft) in length. However, a close rival in size to Gigantophis is a fossil snake, Palaeophis colossaeus, which may have been around 9 metres (30 ft) in length.
- The largest known land lizard is probably Megalania at 7 metres (23 ft) in length. However, maximum size of this animal is subject to debate.
There is much controversy over the largest known of these reptiles. Fossil remains of a pliosaur nicknamed as Predator X have been discovered and excavated from Norway in 2008. This pliosaur has been estimated at 15 metres (49 ft) in length and 45 metric tons (50 short tons) in weight. However, in 2002, a team of paleontologists in Mexico discovered the remains of a pliosaur nicknamed as Monster of Aramberri, which is also estimated at 15 metres (49 ft) in length. This specimen is however claimed to be a juvenile and has been attacked by a larger pliosaur. Some media sources claimed that Monster of Aramberri was a Liopleurodon but its species is unconfirmed thus far. Another very large pliosaur was Pliosaurus macromerus, known from a single 2.8 m long incomplete mandible. It may have reached 18 metres (59 ft), assuming the skull was about 17% of the total body length.
Turtles and tortoises (Testudines)
- The largest known turtle ever was Archelon ischyros at 4 m (13 ft) long, 4.9 m (16 ft) wide and 2,200 kg (4,900 lb). The next largest was Protostega at 3 m (9.8 ft). The second largest seems to be Stupendemys, with an estimated total carapace length of more than 3.3 m (11 ft) and weight of up to 1,814–2,268 kg (3,999–5,000 lb). Carbonemys cofrinii has a shell that measures about 1.72 m (5.6 ft) and was estimated to weigh 916 kg (2,019 lb).
- Two tortoises share the title of largest known ever tortoise: Meiolania at 8 ft. long and well over a ton, and Colossochelys atlas at 8 to 9 ft.and weighing over half a ton.
The largest known is Scutosaurus, up to 3 metres (9.8 ft) in length, with bony armor, and a number of spikes decorating its skull.
The largest known of this order is Rutiodon, who attained a length of 8 metres (26 ft)
- The largest known pterosaur was Quetzalcoatlus northropi, at 127 kg (280 lb) and with a wingspan of 12 m (39 ft). Another close contender is Hatzegopteryx, also with a wingspan of 12 m. This estimate is based on a skull 3 m (9.8 ft) long.
- Yet another possible contender for the title is Tropeognathus, which had a 9-meter (30-foot) wingspan.
Non-avian dinosaurs (Dinosauria)
- A mega-sauropod, Amphicoelias fragillimus, is a contender for the largest known dinosaur in history. It has been estimated at 58 metres (190 ft) in length and 122,400 kilograms (269,800 lb) in weight. Unfortunately, the fossil remains of this dinosaur have been lost.
- Barosaurus lentus may have been the largest sauropod and largest dinosaur yet discovered. Originally thought to reach only 27 metres (89 ft), a massive cervical vertebra has been recently attributed to this species, suggesting maximum length of 50 metres (160 ft) and masses of up to 100 metric tons (110 short tons).
- Other huge sauropods include Argentinosaurus, Alamosaurus and Puertasaurus with estimated lengths of 30–33 metres (98–108 ft) and weights of 50–80 metric tons (55–88 short tons). Giant sauropods like Supersaurus, Sauroposeidon, and Diplodocus probably rivaled them in length but not weight.
Many large sauropods are still unnamed and may rival the current record holders.
- The "Archbishop", a large brachiosaur that was discovered in 1930. The animal may get a scientific paper published by the end of 2016.
- "Brachiosaurus" nougaredi, is yet another large brachiosaur from Early Cretaceous North Africa. The remains have been lost, but the sacrum drawing remains. They suggest a sacrum of almost 5 feet long, making it the largest dinosaur sacrum discovered so far.
- In 2010, the femur of a large sauropod was discovered in France. The femur suggests an animal that grew to immense sizes.
- In 2014, the nearly complete skeletons of 7 titanosaurs were discovered. The skeletons were massive and possibly exceeded Argentinosaurus in size. The skeletons also belonged to sub-adults, suggesting they got much larger.
- The largest theropod as well as the largest terrestrial predator yet known is Spinosaurus aegyptiacus, with the largest specimen known estimated at 12.6–18 metres (41–59 ft) in length and around 7–20.9 metric tons (8–23 short tons) in weight.
- Other large theropods were Giganotosaurus carolinii, and Tyrannosaurus rex, whose largest specimens known estimated at 13.2 metres (43 ft) and 12.3 metres (40 ft) in length respectively. Some other notable giant theropods (e.g. Carcharodontosaurus, Acrocanthosaurus, and Mapusaurus) may also have rivaled them in size.
Armoured dinosaurs (Thyreophora)
The largest known thyreophoran was Ankylosaurus at 9 metres (30 ft) in length and 6 tonnes in weight. Stegosaurus was also 9 meters (30 feet) long but around 5 tonnes in weight.
The very largest known ornithopods, like Shantungosaurus were as heavy as medium-sized sauropods at up to 23 metric tons. (25 short tons) The largest is probably Shantungosaurus at 16.5 metres (54 ft) in length.
The largest known birds of all time might have been the elephant birds of Madagascar. Of almost the same size was the Australian Dromornis stirtoni. Both were about 3 m (9.8 ft) tall. The elephant birds were up to 400 kg and Dromornis stirtoni was up to 500 kg in weight. The tallest bird ever was the giant moa (Dinornis maximus) at 3.6 m (12 ft) tall.
The largest known flight-capable bird was Argentavis magnificens which a wingspan of 8.3 m (27 ft), and a body weight of 110 kg (240 lb).
The largest known shorebird of all time was the great auk (Pinguinus impennis) at 5 kg (11 lb) in weight and 75–85 cm (30–33 in) in length.
Storks and allies (Ciconiiformes)
The largest known pigeon ever was the dodo (Raphus cucullatus), weighing 23 kg (51 lb) and standing 1 m (3.3 ft) tall. Rodrigues solitaire (Pezophaps solitaria), a brown, long-necked birds that were superficially ratite-like. All three species may have exceeded 1 m (3.3 ft) in height. All were carelessly hunted into extinction by humans and introduced animals. The dodo is the most frequently crowned as the largest known ever pigeon, as it could have weighed as much as 28 kg (62 lb), although recent estimates have indicated that an average wild dodo would have weighed around 10.2 kg (22 lb), scarcely larger than a male turkey. If dodos were this light, the Rodrigues solitaire may have been larger. Some estimates claim tha solitaire was merely swan-sized but others estimate weights of up to 27.8 kg (61 lb).
The largest known of the hesperornithines was Canadaga arctica at 5 ft long.
The largest known teratorn and the largest flying bird ever was Argentavis. The immense bird had a wingspan estimated up to 8.3 m (27 ft) and a weight up to 110 kg (240 lb). It was as high as an adult human when standing.
The largest known ever gruiform and largest phorusrhacid or "terror bird" (highly predatory, flightless birds of South America) was Brontornis, which was about 175 cm tall at the shoulder, could raise its head 2.8 m (9.2 ft) above the ground and could have weighed as much as 400 kg (880 lb). The immense phorushacid Kelenken stood 3–3.2 m (9.8–10.5 ft) tall with a skull 28 inches (71 cm) long (18 inches of which was beak), had the largest head of any known bird. The largest North American phorusrhacid is Titanis, which is about 2.5 m (8.2 ft) tall, as tall as a forest elephant.
The largest known bird of prey ever was the enormous Haast's eagle (Harpagornis moorei), with a wingspan of 2.6 to 3 m (8.5 to 9.8 ft), relatively short for their size. Total length was probably up to 1.4 m (4.6 ft) in female and they weighed about 10 to 15 kg (22 to 33 Ib). The largest extinct Titanohierax was a giant hawk about 8 kilograms that lived in the Antilles, where it was among the top predators.
The largest known in this group was a giant flightless Sylviornis, a bird 1.70 m (5.6 ft) long and weighing up to about 30 kg (66 lb).
The largest known songbird is the extinct giant grosbeak (Chloridops regiskongi) at 11 inches (28 cm) long.
Cormorants and allies (Pelecaniformes)
The largest known cormorant was the spectacled cormorant of the North Pacific (Phalacrocorax perspicillatus), which became extinct around 1850, was larger still, averaging around 6.4 kg (14 lb) and 1.15 m (3.8 ft).
Bony-toothed birds (Odontopterygiformes)
The largest known in this group – which has been variously allied with Procellariiformes, Pelecaniformes and Anseriformes – and the largest flying birds of all time other than Argentavis were the huge Pelagornis, Cyphornis, Dasornis, Gigantornis and Osteodontornis. They had a wingspan of 5.5–6 m (18–20 ft) and stood about 1.2 meters (3.9 feet) tall. Exact size estimates and judging which one was largest are not yet possible for these birds, as their bones were extremely thin-walled, light and fragile, and thus most are only known from very incomplete remains.
Woodpeckers and allies (Piciformes)
The largest known woodpecker is the possibly extinct imperial woodpecker (Campephilus imperialis) with a total length of about 22 inches (50 centimeters). The largest woodpecker confirmed to be extant is the great slaty woodpecker (Mulleripicus pulverulentus).
The largest known parrot is the extinct Norfolk Island kaka (Nestor productus), about 38 cm long.
The largest known penguin of all time was Anthropornis nordenskjoeldi of New Zealand and Antarctica. It stood 1.7 meters (5 feet 7 inches) in height and was 90 kilograms (200 pounds) in weight. Similar in size were the New Zealand giant penguin (Pachydyptes pondeorsus) with a height of 1.4 to 1.6 m (4.6 to 5.2 ft) and weighing around 80 to possibly over 100 kg, and Icadyptes salasi at 1.5 m (4.9 ft) tall.
The largest known frog ever was the 16-inch-long (41 cm) Beelzebufo ampinga, weighing 10 pounds (4.5 kg)
The largest known diacectid, Diadectes, was a heavily built animal, 1.5 to 3 meters long, with thick vertebrae and ribs.
Bony fish (Osteichthyes)
Lobe-finned fish (Sarcopterygii)
The largest known of these was the 6–7 m (20–23 ft) long Rhizodus.
Ray-finned fish (Actinopterygii)
Cartilaginous fish (Chondrichthyes)
Mackerel sharks (Lamniformes)
An extinct megatoothed shark, C. megalodon is by far the biggest shark known. This giant shark reached a total length of more than 16 metres (52 ft). C. megalodon may have approached a maximum of 20.3 metres (67 ft) in total length and 103 metric tons (114 short tons) in mass.
The largest known symmoriid was Stethacanthus at 2 metres (6.6 ft) long.
Another fairly large eugenedont is Parahelicoprion. The specimens suggest an animal that grew to the same size (12 meters), but was much less slender and overall less heavy.
The largest known hydontiformid is Ptychodus was about 32 feet (9.8 meters) long.
There are two contenders for largest known ever arachnid: Pulmonoscorpius kirktonensis and Brontoscorpio anglicus. Pulmonoscorpius was 70 centimetres (2.3 ft) Brontoscorpio was 90 centimetres (3.0 ft). The biggest difference is that Brontoscorpio was aquatic, and Pulmonoscorpius was terrestrial. Brontoscorpio is not to be confused with various Eurypterids: it was a true scorpion with a venomous stinger.
The largest known myriapod by far was the giant Arthropleura. Measuring 2.5 metres (8.2 ft) and 45 centimetres (18 in) wide, it was the largest known terrestrial arthropod of all time. Like its modern-day relatives, Arthropleura would have likely sprayed hydrogen cyanide at potential predators, although its sheer size and tough exoskeleton protected it from attack.
Some of these extinct marine arthropods exceeded 60 centimetres (24 in) in length. A nearly complete specimen of Isotelus rex from Manitoba attained a length over 70 centimetres (28 in), and an Ogyginus forteyi from Portugal was almost as long. Fragments of trilobites suggest even larger record sizes. An isolated pygidium of Hungioides bohemicus implies that the full animal was 90 centimetres (35 in) long.
Sawflies, wasps, bees, ants and allies (Hymenoptera)
The largest known of this order was Mazothairos, with a wingspan of up to 22 inches (56 cm).
Several cockroach-like stem dictyopterans from the Carboniferous Period grew to exceptional size. A specimen of Xenoblatta from Ohio was at least 70 mm long, almost the size of the largest cockroach living today.
Snails and slugs (Gastropoda)
The largest known ammonite was Parapuzosia seppenradensis. A partial fossil specimen found in Germany had a shell diameter of 1.95 metres (6.4 ft), but the living chamber was incomplete, so the estimated shell diameter was probably about 2.55 metres (8.4 ft) when it was alive.
The largest known belemnite was Megateuthis gigantea with a guard of 46 centimetres (18 in) in length and an estimated total length 3 metres (9.8 ft) long.
- Carbone, Chris; Teacher, Amber; Rowcliffe, J (2007). "The Costs of Carnivory". PLoS Biology. 5 (2): e22. PMC . PMID 17227145. doi:10.1371/journal.pbio.0050022. Retrieved 2009-12-28.
- Hokkanen, J.E.I. (21 February 1986). "The size of the largest land animal". Journal of Theoretical Biology. Elsevier Ltd. 118 (4): 491–499. PMID 3713220. doi:10.1016/S0022-5193(86)80167-9. Department of Theoretical Physics, University of Helsinki.
- Lambert, Olivier; Giovanni Bianucci; Klaas Post; Christian de Muizon; Rodolfo Salas-Gismondi; Mario Urbina; Jelle Reumer (1 July 2010). "The giant bite of a new raptorial sperm whale from the Miocene epoch of Peru". Nature. Peru: Nature. 466 (7302): 105–108. PMID 20596020. doi:10.1038/nature09067. Retrieved 2 July 2010.
- Perkins, Sid (2010-07-31). "Moby Dick Meets Jaws. Extinct Whale had Teeth Bigger than T. rex's". Science News. 178 (3): 17. doi:10.1002/scin.5591780323. Retrieved 2010-08-22.
- "The Jaws of the Leviathan". Nature Video. c. 2010. Retrieved 2010-08-22.
- Deméré, Thomas A.; Berta, Annalisa; McGowen, Michael R. (2005). "The taxonomic and evolutionary history of fossil and modern balaenopteroid mysticetes". Journal of Mammalian Evolution. 12 (1/2): 99–143. doi:10.1007/s10914-005-6944-3.
- Staff. "Zaglossus hacketti - extinct giant echidna". Tourism Western Australia. Archived from the original on 2014-01-26. Retrieved 2014-04-28.
- Kysely, René. "Aurochs and potential crossbreeding with domestic cattle in Central Europe in the Eneolithic period. A metric analysis of bones from the archaeological site of Kutná Hora-Denemark (Czech Republic)". Anthropozoologica. 43 (2): 2008.
- Giant Camel Disappeared Species. Intechinc.com (2011-07-05)
- Mendoza, M.; Janis, C. M.; Palmqvist, P. (2006). "Estimating the body mass of extinct ungulates: a study on the use of multiple regression". Journal of Zoology. 270 (1): 90–101. doi:10.1111/j.1469-7998.2006.00094.x.
- Teeth: Kubanochoerus gigas lii (GUAN). tesorosnaturales.es
- David Petersen. Of Moose, Megaloceros and Miracles. Motherearthnews.com (1989-03-01)
- Geist, Valerius. "Deer of the world: their evolution, behaviour, and ecology".Oxworth Books. pp. 111, 126, 247–250. (1998) ISBN 0811704963
- Ice Age Marsupial Topped Three Tons, Scientists Say, 2003-09-17. Retrieved 2003-09-17.
- Helgen, K.M., Wells, R.T., Kear, B.P., Gerdtz, W.R., and Flannery, T.F. (2006). "Ecological and evolutionary significance of sizes of giant extinct kangaroos". Australian Journal of Zoology. 54: 293–303. doi:10.1071/ZO05077.
- Soibelzon, L. H.; Schubert, B. W. (January 2011). "The Largest Known Bear, Arctotherium angustidens, from the Early Pleistocene Pampean Region of Argentina: With a Discussion of Size and Diet Trends in Bears". Journal of Paleontology. Paleontological Society. 85 (1): 69–75. doi:10.1666/10-037.1. Retrieved 2011-06-01.
- Dell'Amore, C. (2011): Biggest Bear Ever Found, National Geographic News, Published February 3, 2011
- Alan Turner, National Geographic Prehistoric Mammals National Geographic, 2004, ISBN 0792271343
- "Assessing prey competition in fossil carnivore communities — a scenario for prey competition and its evolutionary consequences for tigers in Pleistocene Java". Palaeogeography, Palaeoclimatology, Palaeoecology. 257: 67–80. doi:10.1016/j.palaeo.2007.09.004.
- Paul S Martin (1984). Quaternary Extinctions. The University of Arizona Press. ISBN 0-8165-1100-4.
- Sorkin, B (2008). "A biomechanical constraint on body mass in terrestrial mammalian predators". Lethaia. 41: 333–347. doi:10.1111/j.1502-3931.2007.00091.x.
- "Wolves, Coyotes, and Dogs (Genus Canis)". Museum.state.il.us. Retrieved 2011-10-23.
- Villier, Boris (2010). "Deinogalerix: a giant hedgehog from the Miocene". Annali dell’Università di Ferrara. 6: 93–102. ISSN 1824-2707.
- Gregory S. Paul (1992). "The size and bulk of extinct giant land herbivores" (PDF). Retrieved 16 February 2013.
- Larramendi, A. (2016). "Shoulder height, body mass and shape of proboscideans" (PDF). Acta Palaeontologica Polonica. 61. doi:10.4202/app.00136.2014.
- Ciochon, Russell L. "The Ape that Was - Asian fossils reveal humanity's giant cousin". University of Iowa. Archived from the original on 2015-05-25. Retrieved 2007-12-06.
- Pettifor, Eric (2000) . "From the Teeth of the Dragon: Gigantopithecus Blacki". Selected Readings in Physical Anthropology. Kendall/Hunt Publishing Company. pp. 143–149. ISBN 0-7872-7155-1. Retrieved 2008-01-30.
- Osborn, H. F. (1942). Proboscidea, Vol. II. New York: The American Museum Press.
- Rinderknecht, Andrés; R. Ernesto Blanco (2008-01-15). "The largest fossil rodent" (pdf). Proceedings of the Royal Society B: Biological Sciences. 275 (1637): 923–8. PMC . PMID 18198140. doi:10.1098/rspb.2007.1645. Retrieved 2008-01-16. Lay summary.
- Johnson, Steven C. & Madden, Richard H. 1997. Uruguaytheriinae Astrapotheres of Tropical South America. Chapter 22 in "Vertebrate Paleontology in the Neotropics. The Miocene Fauna of La Venta, Colombia". Edited by Richard F. Kay, Richard H. Madden, Richard L. Cifelli, and John J. Flynn. Smithsonian Institution Press. Washington and London.
- Kramarz, Alejandro G.; Bond, Mariano (2008). "Revision of Parastrapotherium (Mammalia, Astrapotheria) and other Deseadan astrapotheres of Patagonia". Ameghiniana. 45 (3). Retrieved March 1, 2013.
- Nicholas D. Pyenson, Geerat J. Vermeij, The rise of ocean giants: maximum body size in Cenozoic marine mammals as an indicator for productivity in the Pacific and Atlantic Oceans, Published 5 July 2016.DOI: 10.1098/rsbl.2016.0186
- Gingerich, Philip D. (1998). "Paleobiological Perspectives on Mesonychia, Archaeoceti, and the Origin of Whales". In Thewissen, J.G.M. The emergence of whales: evolutionary patterns in the origin of Cetacea. New York: Plenum Press. pp. 423–450. ISBN 978-0-306-45853-8.
- Elissamburu, A (2012). "Estimación de la masa corporal en géneros del Orden Notoungulata". Estudios Geológicos. 68 (1): 91–111. doi:10.3989/egeol.40336.133.
- Sorkin, B. (2008). "A biomechanical constraint on body mass in terrestrial mammalian predators". Lethaia. 41: 333–347. doi:10.1111/j.1502-3931.2007.00091.x.
- van Valkenburgh, Blaire; Jenkins, Ian (2002). "Evolutionary Patterns in the History of Permo-Triassic and Cenozoic synapsid predators". Paleontological Society Papers 8: 267–288.
- "Brithopodidae / Anteosauridae". Kheper. M.Alan Kazlev. Retrieved 24 October 2015.
- "Anteosaurus". Prehistoric Wildlife. Retrieved 24 October 2015.
- Lyon, Gabrielle. "Fact Sheet". SuperCroc. Project Exploration. Retrieved 2007-09-22.
- Lucas, Spencer G.; Robert M. Sullivan; Justin A. Spielmann (2006). "The Giant Crocodylian Deinosuchus from the Upper Cretaceous of the San Juan Basin, New Mexico" (PDF). New Mexico Museum of Natural History and Science Bulletin. Mexico. 35. Archived from the original (PDF) on June 17, 2009. Retrieved 11 May 2010.
- Bocquentin, Jean; Melo, Janira (2006). "Stupendemys souzai sp. nov (Pleurodira, Podocnemididae) from the Miocene-Pliocene of the Solimões Formation, Brazil" (PDF). Sociedade Brasileira de Paleontologia. 9 (2): 187–192. doi:10.4072/rbp.2006.2.02.
- Head, J. J. (2001). "Systematics and body size of the gigantic, enigmatic crocodyloid Rhamphosuchus crassidens, and the faunal history of Siwalik Group (Miocene) crocodylians". Journal of Vertebrate Paleontology. 21 (Supplement to No. 3): 59A. doi:10.1080/02724634.2001.10010852.
- Dortangs, Rudi W.; Anne S. Schulp; Eric W. A. Mulder; John W.M. Jagt (2002). "A large new mosasaur from the Upper Cretaceous of The Netherlands" (PDF). Netherlands Journal of Geosciences. Netherlands. 81 (1): 1–8. Retrieved 11 May 2010.
- Everhart, Mike. "Research: Tylosaurus proriger - A new record of a large mosasaur from the Smoky Hill Chalk". Retrieved 12 May 2010.
- "Fact File: Tylosaurus Proriger from National Geographic". Retrieved 12 May 2010.
- Russell, D. A. 1967. Systematics and morphology of American mosasaurs (Reptilia, Sauria). Yale Univ. Bull 23:241. pp.
- Lingham-Soliar, T (1998). "Unusual death of a Cretaceous giant". Lethaia. 31: 308–310.
- Lindgren, Johan (2005). "The first record of Hainosaurus (Reptilia: Mosasauridae) from Sweden". Journal of Paleontology: Vol. 79 (6): 1157–1165. doi:10.1666/0022-3360(2005)079[1157:tfrohr]2.0.co;2.
- Head, Jason J.; et al. (5 February 2009). "Giant boid snake from the Palaeocene neotropics reveals hotter past equatorial temperatures" (PDF). Nature. Colombia: Macmillan Publishers Limited. 457 (7230): 715–717. PMID 19194448. doi:10.1038/nature07671. Retrieved 12 May 2010.
- Head, J. & Polly, D. 2004. They might be giants: morphometric methods for reconstructing body size in the world’s largest snakes. Journal of Vertebrate Paleontology 24 (Supp. 3), 68A-69A.
- Information from issue 2473 of New Scientist magazine, 10 November 2004, page 17
- Rage, Jean-Claude; Sunil Bajpai; Johannes G. M. Thewissen; Brahma N. Tiwari (2003). "Early Eocene snakes from Kutch, Western India, with a review of the Palaeophiidae" (PDF). Geodiversitas. India: Editions scientifiques du Muséum, Paris, FRANCE. 25 (4): 695–716. ISSN 1280-9659. Retrieved 12 May 2010.
- Rage, J.-C. (1983). "Palaeophis colossaeus nov. sp. (le plus grand Seprent connu?) de l’Eocène du Mali et le problème du genre chez les Palaeopheinae". Comptes Rendus des Séances de l'Académie des Sciences, Paris. 3 (296): 1741–1744.
- Molnar, Ralph E. (2004). Dragons in the dust: the paleobiology of the giant monitor lizard Megalania. Bloomington: Indiana University Press. ISBN 0-253-34374-7.
- "Review of DRAGONS IN THE DUST: THE PALEOBIOLOGY OF THE GIANT MONITOR LIZARD MEGALANIA, by Ralph E. Molnar, 2004 in the Journal of Vertebrate Paleontology 25(2):479, June 2005" (PDF). Retrieved 12 January 2012.
- Alleyne, Richard (2009-03-17). "Biggest and smallest prehistoric predators unearthed". London: The Daily Telegraph. Retrieved 2009-03-17.
- Coghlan, Andy (2009-03-17). "Fossil of 'ultimate predator' unearthed in Arctic". New Scientist. Retrieved 2009-03-17.
- Buchy, M.-C.; Frey, E.; Stinnesbeck, W.; López-Oliva, J.G. (2003). "First occurrence of a gigantic pliosaurid plesiosaur in the late Jurassic (Kimmeridgian) of Mexico". Bulletin de la Société Géologique de France. 174 (3): 271–278. doi:10.2113/174.3.271.
- "Monster von Arramberri". Retrieved 6 February 2010.
- "The Cumnor monster mandible". Retrieved 31 October 2011.
- "Triassic Giant". Retrieved 7 February 2010.
- Lutz, Peter L.; John A. Musick (1996). The Biology of Sea Turtles. CRC Press. p. 432pp. ISBN 0-8493-8422-2.
- Afro-American River Turtles: Podocnemididae – Behavior And Reproduction. animals.jrank.org
- Researchers reveal ancient giant turtle fossil. Phys.org (2012-05-17)
- Maugh II, Thomas H. (2012-05-18). "Researchers find fossil of a turtle that was size of a Smart car". LA Times.
- Freeman, David (2012-05-17). "Car-Sized Reptile Lived Alongside Titanoboa, Scientists Say". Huffington Post.
- Buffetaut, E.; Grigorescu, D.; Csiki, Z. (2002). "A new giant pterosaur with a robust skull from the latest Cretaceous of Romania". Naturwissenschaften. 89 (4): 180–184. PMID 12061403. doi:10.1007/s00114-002-0307-1.
- Carpenter, K. (2006). "Biggest of the big: a critical re-evaluation of the mega-sauropod Amphicoelias fragillimus." In Foster, J.R. and Lucas, S.G., eds., 2006, Paleontology and Geology of the Upper Jurassic Morrison Formation. New Mexico Museum of Natural History and Science Bulletin 36: 131–138.
- Paul, G.S., 2010, The Princeton Field Guide to Dinosaurs, Princeton University Press.
- Therrien, F.; Henderson, D.M. (2007). "My theropod is bigger than yours...or not: estimating body size from skull length in theropods". Journal of Vertebrate Paleontology. 27 (1): 108–115. ISSN 0272-4634. doi:10.1671/0272-4634(2007)27[108:MTIBTY]2.0.CO;2.
- dal Sasso, C.; Maganuco, S.; Buffetaut, E.; Mendez, M.A. (2005). "New information on the skull of the enigmatic theropod Spinosaurus, with remarks on its sizes and affinities". Journal of Vertebrate Paleontology. 25 (4): 888–896. doi:10.1671/0272-4634(2005)025[0888:NIOTSO]2.0.CO;2.
- Calvo, Jorge O.; Coria, Rodolfo (1998). "New specimen of Giganotosaurus Carolinii" (PDF). GAIA: 117–122.
- Henderson DM (January 1, 1999). "Estimating the masses and centers of mass of extinct animals by 3-D mathematical slicing". Paleobiology. 25 (1): 88–106.
- Vickaryous, M.K., Maryanska, T., & Weishampel, D.B. 2004. Ankylosauria. In: Weishampel, D.B., Dodson, P., & Osmólska, H. (Eds.). The Dinosauria (2nd edition). Berkeley: University of California Press. Pp. 363-392.
- Coombs, Walter P. (December 1978). "Theoretical Aspects of Cursorial Adaptations in Dinosaurs". The Quarterly Review of Biology. 53 (4): 393–418. doi:10.1086/410790.
- Holtz, Thomas R. Jr. (2008). Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages. New York: Random House. pp. 52, updated appendix. ISBN 0-375-82419-7.
- Zhao, X.; Li, D.; Han, G.; Hao, H.; Liu, F.; Li, L.; Fang, X. (2007). "Zhuchengosaurus maximus from Shandong Province". Acta Geoscientia Sinica. 28 (2): 111–122. doi:10.1007/s10114-005-0808-x.
- Morris, William J. (1981). "A new species of hadrosaurian dinosaur from the Upper Cretaceous of Baja California: ?Lambeosaurus laticaudus". Journal of Paleontology. 55 (2): 453–462.
- "Dromornis stirtoni". Australian Museum.
- BBC - Earth News - Giant fossil bird found on 'hobbit' island of Flores
- Meijer HJ, R ADue (2010). "A new species of giant marabou stork (Aves: Ciconiiformes) from the Pleistocene of Liang Bua, Flores (Indonesia)". Zoological Journal of the Linnean Society. 160: 707–724. doi:10.1111/j.1096-3642.2010.00616.x.
- Nature: An Economic History by Geerat J. Vermeij. Princeton University Press (2004), ISBN 0691115273[page needed]
- Angst D, Buffetaut E, Abourachid A (March 2011). "The end of the fat dodo? A new mass estimate for Raphus cucullatus". Die Naturwissenschaften. 98 (3): 233–6. PMID 21240603. doi:10.1007/s00114-010-0759-7.
- [full citation needed]
- [full citation needed]
- Alvarenga, Herculano M.F.; Höfling, Elizabeth (2003). "Systematic revision of the Phorusrhacidae (Aves: Ralliformes)". Papéis Avulsos de Zoologia. 43 (4). doi:10.1590/S0031-10492003000400001.
- California Academy of Sciences – Science Under Sail. Calacademy.org
- Arredondo, Oscar (1976) translated Olson, Storrs L. The Great Predatory Birds of the Pleistocene of Cuba pp. 169-187 in "Smithsonian Contributions to Paleobiology number 27; Collected Papers in Avian Paleontology Honoring the 90th Birthday of Alexander Wetmore"
- Palmer, D., ed. (1999). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. p. 53. ISBN 1-84028-152-9.
- Levy, D.L., & Heald, R. (2015). "Biological Scaling Problems and Solutions in Amphibians." Cold Spring Harbor Perspectives in Biology, a019166.
- Liston, J., Newbrey, M., Challands, T., and Adams, C., 2013, "Growth, age and size of the Jurassic pachycormid Leedsichthys problematicus (Osteichthyes: Actinopterygii) in: Arratia, G., Schultze, H. and Wilson, M. (eds.) Mesozoic Fishes 5 – Global Diversity and Evolution. Verlag Dr. Friedrich Pfeil, München, Germany, pp. 145-175
- deGruy, Michael (2006). Perfect Shark (TV-Series). BBC (UK).
- Klimley, Peter; Ainley, David (1996). Great White Sharks: The Biology of Carcharodon carcharias. Academic Press. ISBN 0-12-415031-4.[page needed]
- Pimiento C, Ehret DJ, Macfadden BJ, Hubbell G (2010). "Ancient nursery area for the extinct giant shark megalodon from the Miocene of Panama". PLOS ONE. 5 (5): e10552. PMC . PMID 20479893. doi:10.1371/journal.pone.0010552.
- Wroe, S.; Huber, D. R.; Lowry, M.; McHenry, C.; Moreno, K.; Clausen, P.; Ferrara, T. L.; Cunningham, E.; Dean, M. N.; Summers, A. P. (2008). "Three-dimensional computer analysis of white shark jaw mechanics: how hard can a great white bite?". Journal of Zoology. 276 (4): 336–342. doi:10.1111/j.1469-7998.2008.00494.x.
- Gigantic ancient arthropod was really 'a very peaceful guy'
- Gutiérrez-Marco, Juan C.; Sá, Artur A.; Garcia-Bellido, Diego C.; Rabano, Isabel; Valério, Manuel (2009). "Giant Trilobites and Trilobite Clusters from the Ordovician of Portugal". Geology. 37: 443–446. doi:10.1130/G25513A.1.
- Schaal, Stephan (27 January 2006). "Messel". eLS. doi:10.1038/npg.els.0004143.
- "The Biomarker Guide: Biomarkers and Isotopes in Petroleum Systems and Earth History". Google Books. 2005. p. 1107.
- Svitil, Kathy A. (2003-12-08). "The First Spinners". Discover. Retrieved 2010-09-09.
- Easterday, Cary R. (2003). Evidence for silk-spinning in trigonotarbid arachnids (Chelicerata: Tetrapulmonata) and other discoveries from Cemetery Hill (Carboniferous: Desmoinesian-Missourian), Columbiana County, Eastern Ohio. 2003 Seattle Annual Meeting. 35. Seattle, Washington: Geological Society of America. p. 538.
- Teichert C; B Kummel (1960). "Size of Endocerid Cephalopods". Breviora Mus. Comp. Zool. 128: 1–7.
- http://www.tonmo.com/science/fossils/cretaceousGS.php[full citation needed]