Koilops

Extinct genus of tetrapodomorphs

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Koilops Temporal range: early mid-Tournaisian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification Edit this classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Sarcopterygii
Clade:	Tetrapodomorpha
Clade:	Stegocephali
Genus:	†Koilops Clack et al., 2016
Type species
†Koilops herma Clack et al., 2016

Koilops is an extinct genus of four-limbed stem-tetrapod from the Mississippian (mid-Tournaisian) of Scotland. It contains a single species, Koilops herma, based on a mold of an 8.0 cm (3.1 in.)-long skull from the Ballagan Formation. A phylogenetic analysis in its original description places Koilops as a close relative of Tulerpeton and colosteids. Koilops was described in a 2016 study which was devised to fill in the tetrapod and stem-tetrapod faunas of Romer's gap, an interval of the early Carboniferous with few vertebrate fossils. It was one of five new genera named in this study, along with Aytonerpeton , Diploradus , Ossirarus , and Perittodus .^[1]

References

[edit ]

^ Clack, Jennifer A.; Bennett, Carys E.; Carpenter, David K.; Davies, Sarah J.; Fraser, Nicholas C.; Kearsey, Timothy I.; Marshall, John E. A.; Millward, David; Otoo, Benjamin K. A.; Reeves, Emma J.; Ross, Andrew J. (2016年12月05日). "Phylogenetic and environmental context of a Tournaisian tetrapod fauna". Nature Ecology & Evolution. 1 (1): 2. doi:10.1038/s41559-016-0002. hdl:2381/40933 . ISSN 2397-334X. PMID 28812555. S2CID 22421017.

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Tetrapodomorpha (Pan-Tetrapoda)

Kingdom: Animalia
Phylum: Chordata
Clade: Osteichthyes
Clade: Sarcopterygii
Clade: Rhipidistia

Gnathostomata

see Gnathostomata
Tetrapodomorpha	see below↓

Tetrapodomorpha

†Rhizodontida

†Canowindridae

†Megalichthyidae

Eotetrapodiformes

†Palaeospondylus ?

†Tristichopteridae

Elpistostegalia

†Howittichthys ? †Livoniana †Panderichthys †Parapanderichthys †Qikiqtania †Rubrognathus †Tiktaalik
Stegocephali (Tetrapoda sensu lato)	see below↓

Rhizodus sp.

Osteolepis macrolepidotus Eusthenopteron foordi

Tiktaalik rosae

Stegocephali (Tetrapoda sensu lato)

Devonian taxa

†Acanthostega †Brittagnathus †Densignathus †Elpistostege ? †Hynerpeton †Ichthyostega †Jakubsonia †Metaxygnathus †Parmastega †Sinostega †Tiktaalik ? †Tulerpeton †Tutusius †Umzantsia †Ventastega †Ymeria
†Elginerpetontidae	Elginerpeton Obruchevichthys Webererpeton