Dercetis (fish)

Dercetis; Temporal range: Turonian to Maastrichtian PreꞒ Ꞓ O S D C P T J K Pg N
	Dercetis sp. from Lebanon
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Aulopiformes
Family:	†Dercetidae
Genus:	†Dercetis; Agassiz, 1834
Type species
	†Dercetis elongatus; Agassiz, 1835
Species
	†D. elongatus Agassiz, 1835; †D. magnificus Chida, Brinkman & Murray, 2022; †D. triqueter Pictet, 1850;

Dercetis is a genus of prehistoric marine ray-finned fish. It is the type genus of the family Dercetidae, a group of slender, elongate aulopiforms, which were related to modern lizardfish and grinners. It is known from the Late Cretaceous of Europe, the Middle East, and western North America.^[2]

The following species are known:^[1]^[3]

†D. elongatus Agassiz, 1835 - Turonian of England (English Chalk), Campanian of Germany (Ahlen Formation) (=Leptotrachelus sagittatus von der Marck, 1873)
†D. magnificus Chida, Brinkman & Murray, 2022 - Campanian of Alberta, Canada (Bearpaw Formation)
†D. triqueter Pictet, 1850 - Santonian of Lebanon (Sahel Alma), Maastrichtian of the Netherlands & Belgium (Maastricht Formation)^[4]

Small Dercetis specimens corresponding to indeterminate species are known from the Turonian of the Czech Republic and Mexico.^[1]

The initial type species, D. scutatus Agassiz, 1834 from the Campanian of Germany (Baumberge Formation), is known from a now-lost specimen and is thus considered a nomen nudum. D. elongatus, which is now treated as the type species of the genus, was initially classified into Dercetis, then reclassified into the now-defunct genus Leptotrachelus before being reclassified back into Dercetis. The same treatment occurred for D. triqueter.^[1]^[3] Many other dercetid taxa were initially classified into Dercetis before being moved to their own genera. Other indeterminate taxa dubiously classified into Dercetis, but with no reclassification yet, include D. reussi Fristch, 1878 from the Czech Republic and D. latiscutatus Woodward, 1903 & D. maximus Woodward, 1903 from England.^[1]

As suggested by its name, D. magnificus is the largest species of the genus, and possibly one of the largest dercetids, with the potential to grow to one meter in length. It inhabited open marine environments of the northern Western Interior Seaway.^[1]

References

^ ^a ^b ^c ^d ^e ^f Chida, Mori; Brinkman, Donald B.; Murray, Alison M. (2023-10-01). "A large, new dercetid fish (Teleostei: Aulopiformes) from the Campanian Bearpaw Formation of Alberta, Canada". Cretaceous Research. 150: 105579. doi:10.1016/j.cretres.2023.105579. ISSN 0195-6671.
^ "PBDB Taxon". paleobiodb.org. Retrieved 2024-08-11.
^ ^a ^b Silva, Hilda M. A.; Gallo, Valéria (2011). "Taxonomic review and phylogenetic analysis of Enchodontoidei (Teleostei: Aulopiformes)". Anais da Academia Brasileira de Ciências. 83: 483–511. doi:10.1590/S0001-37652011000200010. ISSN 0001-3765.
^ Taverne, Louis; Goolaerts, Stijn (2015-01-01). "The dercetid fishes (Teleostei, Aulopiformes) from the Maastrichtian (Late Cretaceous) of Belgium and The Netherlands". Geologica Belgica. ISSN 1374-8505.

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[:0-1] ^ ^a ^b ^c ^d ^e ^f Chida, Mori; Brinkman, Donald B.; Murray, Alison M. (2023-10-01). "A large, new dercetid fish (Teleostei: Aulopiformes) from the Campanian Bearpaw Formation of Alberta, Canada". Cretaceous Research. 150: 105579. doi:10.1016/j.cretres.2023.105579. ISSN 0195-6671.

[2] "PBDB Taxon". paleobiodb.org. Retrieved 2024-08-11.

[:1-3] Silva, Hilda M. A.; Gallo, Valéria (2011). "Taxonomic review and phylogenetic analysis of Enchodontoidei (Teleostei: Aulopiformes)". Anais da Academia Brasileira de Ciências. 83: 483–511. doi:10.1590/S0001-37652011000200010. ISSN 0001-3765.

[4] Taverne, Louis; Goolaerts, Stijn (2015-01-01). "The dercetid fishes (Teleostei, Aulopiformes) from the Maastrichtian (Late Cretaceous) of Belgium and The Netherlands". Geologica Belgica. ISSN 1374-8505.

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