Kuamaia lata: Difference between revisions
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#REDIRECT [[Kuamaia]] |
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{{taxobox |
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| name = Kuamaia |
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| image = |
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| image_caption = |
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| regnum = [[Animalia]] |
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| phylum = Arthropoda |
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| genus = ''Kuamaia'' |
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| species = ''K. lata'' |
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| fossil_range = {{Geological range|Cambrian}} |
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}} |
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'''''Kuamaia lata''''' is a now [[Extinction|extinct]] [[ecdysozoa]] in the [[phylum]] [[Arthropod|Arthropoda]].<ref>{{Cite journal |title=Arthroaspis n. gen., a common element of the Sirius Passet Lagerstätte (Cambrian, North Greenland), sheds light on trilobite ancestry |last=Stein |first=Martin |last2=Budd |first2=Graham E |date=2013-05-11 |pages=99 |doi=10.1186/1471-2148-13-99 |pmc=3662621 |pmid=23663519 |last3=Peel |first3=John S |last4=Harper |first4=David AT|journal = BMC Evolutionary Biology|volume = 13}}</ref><ref>{{Cite web |url=http://fossilworks.org/bridge.pl?a=taxonInfo&taxon_no=167498 |title=Fossilworks: Kuamaia lata |website=fossilworks.org |publisher=[[Fossilworks]] |access-date=2020-01-01}}</ref> [[Fossil|Fossils]] of ''K. lata'' were discovered in the [[Maotianshan Shales|Chengjiang biota]]. The closely related congeneric [[species]] ''K. muricata'' has also been identified there, but neither species has been found elsewhere.<ref name=":0">{{Cite book|title=The Cambrian fossils of Chengjiang, China : the flowering of early animal life|others=Hou, Xianguang.|isbn=978-1-118-89631-0|edition=Second|location=Chichester, West Sussex|oclc=970396735}}</ref> |
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''K. lata'' was a [[Benthic zone|benthic]] arthropod<ref name=":0" /><ref name=":1">{{Cite journal|last=Zhao|first=Fangchen|last2=Caron|first2=Jean-Bernard|last3=Bottjer|first3=David J.|last4=Hu|first4=Shixue|last5=Yin|first5=Zongjun|last6=Zhu|first6=Maoyan|date=2014|title=Diversity and species abundance patterns of the Early Cambrian (Series 2, Stage 3) Chengjiang Biota from China|journal=Paleobiology|volume=40|issue=1|pages=50–69|issn=0094-8373|jstor=44017866|doi=10.1666/12056}}</ref> and a mobile [[Hunting|hunter]] and [[scavenger]].<ref name=":1" /> A spiny section on ''K. lata''<nowiki/>'s legs is presumed to have allowed it to tear apart food.<ref name=":0" /> |
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== Morphology == |
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''K. lata'' has an oval dorsal [[exoskeleton]] shape, with a gradual decline from the somewhat elevated medial axis of the animal to the exoskeleton edge. ''K. lata'' appears smooth, with little space between [[Tergum|tergites]] and low-profile [[Trilobite|pleural]] spines. Some fusion of parts of the exoskeleton is evident, but there is some discussion as to what degree this occurred. The tail segment has three more prominent spines, two being lateral and one axial. The largest fossil ''K. lata'' was at least 10cm long, excluding [[Appendage|appendages]].<ref name=":0" /> |
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On the underside of ''K. lata,'' opposite the dorsal head shield, there is also a ventral [[sclerite]]. ''K. lata'' appears to have approximately 15 pairs of [[Arthropod leg|biramous]] legs, 3 originating from the head shield, 1 from each of the seven tergites that make up ''K. lata's'' [[thorax]], and another 5 from the tail segments.<ref name=":0" /> |
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The ramuses, also known as the exopods of the biramous legs, acted as the gills of ''K. lata.''<ref name=":2">{{Cite journal|last=Suzuki|first=Yutaro|last2=Kondo|first2=Akiyoshi|last3=Bergström|first3=Jan|date=2008|title=Morphological Requirements in Limulid and Decapod Gills: A Case Study in Deducing the Function of Lamellipedian Exopod Lamellae|journal=Acta Palaeontologica Polonica|volume=53|issue=2|pages=275–283|doi=10.4202/app.2008.0208|issn=0567-7920}}</ref> These gills were made up of many lamellae, which facilitated gas exchange.<ref name=":2" /><ref>{{Cite web|url=https://www.britannica.com/science/respiratory-system|title=Respiratory system - Gills of invertebrates|website=Encyclopedia Britannica|language=en|access-date=2019-12-05}}</ref> These lamellae were packed together in rows on each exopod. ''K. lata'' had a lower number of these, with an average number of 22 lamellae per exopod, compared to an average of 50 in other arthropods.<ref name=":2" /> |
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{{Taxonbar|from=Q80563553}} |
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== References == |
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{{reflist}} |
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[[Category:Arthropods]] |
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Latest revision as of 18:17, 2 April 2020
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