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Echidnocephalus

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Extinct genus of fishes

Echidnocephalus Temporal range:LateCampanian PreꞒ Ꞓ O S D C P T J K Pg N PossibleConiacian andMaastrichtian occurrence

Fossil ofEchidnocephalus troscheli
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Notacanthiformes
Family:	Halosauridae
Genus:	†Echidnocephalus von der Marck, 1858
Type species
†Echidnocephalus troscheli von der Marck, 1858
Species^[1]
†E. troschelivon der Marck, 1858 ?†E. americanusCockerell, 1919 ?†E. pacificusCockerell, 1919

Echidnocephalus (Greek for "Echidna's head") is anextinct genus of prehistorichalosaur known from theLate Cretaceous. It is the earliest known definitive member of the orderNotacanthiformes.^[2]

It contains one definitive species known from complete and partial specimens:E. troscheli (=E. tenuicaudusvon der Marck, 1858) from the lateCampanian-agedAhlen Formation ofWestphalia,Germany.^[3] These body fossils suggest an animal already very similar to modern halosaurs.^[2]

In addition, two disputed species known only from isolated fossil scales very similar to those of modern halosaurs have been described from North America: ?E. americanusCockerell, 1919 from theConiacian-agedMancos Shale of Wyoming and ?E. pacificusCockerell, 1919 from theMaastrichtian-agedMoreno Formation of California.^[4]^[5]

References

[edit]

^Behrensmeyer, A.K.; Turner, A. (2013)."†Echidnocephalus". PalaeoDB. Retrieved17 December 2021.
^^a ^bNear, Thomas J.; Thacker, Christine E. (2024-04-18)."Phylogenetic Classification of Living and Fossil Ray-Finned Fishes (Actinopterygii)".Bulletin of the Peabody Museum of Natural History.65 (1).doi:10.3374/014.065.0101.ISSN 0079-032X.
^Sepkoski, Jack (2002)."A compendium of fossil marine animal genera".Bulletins of American Paleontology.364: 560. Archived fromthe original on 2011-07-23. Retrieved2009-02-27.
^Professional Paper. U.S. Government Printing Office. 1919.
^"PBDB Taxon".paleobiodb.org. Retrieved2024-12-16.

Elopomorph genera

Kingdom:Animalia
Phylum:Chordata
Class:Actinopterygii
Subclass:Neopterygii
Infraclass:Teleostei

Actinopterygii

- seeActinopterygii

Neopterygii

- seeNeopterygii

Teleostei

seeTeleostei
Elopomorpha	see below↓

Elopomorpha

Elopiformes

†Anaethalion †Aulothrissus †Daitingichthys †Davichthys †Echinelops †Eichstaettia †Elopsomolos †Eoprotelops †Epaelops †Flindersichthys †Ichthyemidion †Leptoelops †Naiathaelon †Protelops
†Phyllodontidae	Egertonia Eodiaphyodus Paralbula Phyllodus Pseudoegertonia
Elopidae	†Ctenodentelops Elops †Kipalelops †Lyrolepis †Protoelops
Megalopidae	†Arratiaelops †Brouweria †Elopoides Megalops †Paratarpon †Promegalops †Protarpon †Sedenhorstia

Albuliformes

†Baugeichthys †Brannerion †Bullichthys †Euroka †Farinichthys †Holcolepis †Lebonichthys †Marathonichthys †Osmeroides †Palealbula †Paraelops †Protalbula †Stewartichthys
Albulidae	Albula †Casierius †Deltaichthys †Elopothrissus †Hajulia †Istieus †Italoalbula Nemoossis †Nunaneichthys †Phosphonatator †Pteralbula Pterothrissus

Notacanthiformes

Notacanthidae	Lipogenys Notacanthus Polyacanthonotus
Halosauridae	Aldrovandia †Echidnocephalus Halosauropsis Halosaurus †Laytonia

Anguilliformes

- seeEels

Category

Taxon identifiers
Echidnocephalus	Wikidata:Q18609718 EoL:1336465 GBIF:3238291 IRMNG:1106914 Open Tree of Life:4948716 Paleobiology Database:35359
Echidnocephalus troscheli	Wikidata:Q5332399 GBIF:8522489 Open Tree of Life:7649661 Paleobiology Database:263572