Aglaocetus

Aglaocetus; Temporal range: Early-Late Miocene; ~20.4–7.2 Ma PreꞒ Ꞓ O S D C P T J K Pg N
	A. moreni skull
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Artiodactyla
Infraorder:	Cetacea
Superfamily:	Balaenopteroidea
Family:	†Aglaocetidae; Steeman 2007
Genus:	†Aglaocetus; Kellogg 1934
Species
	A. burtini (van Beneden 1859); A. latifrons (van Beneden 1880); A. longifrons (van Beneden 1880); A. moreni (Lydekker 1894) (type); A. rotundus (van Beneden 1880);
Synonyms
	Amphicetus rotundus van Beneden 1880; Cetotherium burtini; Cetotherium burtinii; Cetotherium moreni Lydekker 1894; Heterocetus burtini; Heterocetus burtinii; Idiocetus longifrons; Mesocetus latifrons; Plesiocetus burtini; Plesiocetus burtinii; Plesiocetus longifrons; Plesiocetus latifrons;

Aglaocetus is a genus of extinct mysticete known from the Miocene of Patagonia, the US Eastern Seaboard, Japan and the Low Countries. It was once considered a member of Cetotheriidae along with many other putative cetotheres, but was recently recognized as representing a distinct family from true Cetotheriidae.

Species

There are four currently recognized valid species: Aglaocetus moreni, A. latifrons, A. burtini, and A. rotundus.^[1]^[2]^[3]

The type species, Aglaocetus moreni, was originally described as a species of Cetotherium, but later recognized as generically distinct from the latter.^[4] "Aglaocetus" patulus, described from the Calvert Formation by Remington Kellogg in 1968,^[5] was recovered by Bisconti et al. (2013) in a different phylogenetic position than the Aglaocetus type species.^[6] In 2020, A. patulus was renamed Atlanticetus.^[7]

Distribution

Fossils of Aglaocetus have been found in:^[8]

Miocene

Gaimán Formation (Colhuehuapian-Santacrucian), Argentina
Diest and Berchem Formations, Belgium
Eibergen Member, Netherlands

References

^ R. Lydekker. 1894. Cetacean skulls from Patagonia. Anales del Museo de la Plata II:1-13
^ P. J. Van Beneden. 1859. Rapport de M. Van Beneden. Bulletins de L'Academie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique 8:123-146
^ P. J. Van Beneden. 1880. Les mysticetes a courts fanons des sables des environs d'anvers. Bulletins de L'Academie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique 1880:11-27
^ R. Kellogg. 1934. The Patagonian Fossil Whalebone Whale, Cetotherium moreni (Lydekker). Carnegie Institution of Washington 447:64-81
^ R. Kellogg. 1968. A sharp-nosed cetothere from the Miocene Calvert. Proceedings of the United States National Museum 247(7):163-173
^ M. Bisconti, O. Lambert, and M. Bosselaers. 2013. Taxonomic revision of Isocetus depauwi (Mammalia, Cetacea, Mysticeti) and the phylogenetic relationships of archaic 'cetothere' mysticetes. Palaeontology 56(1):95-127
^ Bisconti, M., Damarco, P., Mao, S., Pavia, M. and Carnevale, G. (2020). The earliest baleen whale from the Mediterranean: large‐scale implications of an early Miocene thalassotherian mysticete from Piedmont, Italy. Papers in Palaeontology doi:10.1002/spp2.1336
^ Aglaocetus at Fossilworks.org

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[1] R. Lydekker. 1894. Cetacean skulls from Patagonia. Anales del Museo de la Plata II:1-13

[2] P. J. Van Beneden. 1859. Rapport de M. Van Beneden. Bulletins de L'Academie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique 8:123-146

[3] P. J. Van Beneden. 1880. Les mysticetes a courts fanons des sables des environs d'anvers. Bulletins de L'Academie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique 1880:11-27

[4] R. Kellogg. 1934. The Patagonian Fossil Whalebone Whale, Cetotherium moreni (Lydekker). Carnegie Institution of Washington 447:64-81

[5] R. Kellogg. 1968. A sharp-nosed cetothere from the Miocene Calvert. Proceedings of the United States National Museum 247(7):163-173

[6] M. Bisconti, O. Lambert, and M. Bosselaers. 2013. Taxonomic revision of Isocetus depauwi (Mammalia, Cetacea, Mysticeti) and the phylogenetic relationships of archaic 'cetothere' mysticetes. Palaeontology 56(1):95-127

[7] Bisconti, M., Damarco, P., Mao, S., Pavia, M. and Carnevale, G. (2020). The earliest baleen whale from the Mediterranean: large‐scale implications of an early Miocene thalassotherian mysticete from Piedmont, Italy. Papers in Palaeontology doi:10.1002/spp2.1336

[FWAglaocetus-8] Aglaocetus at Fossilworks.org

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