Pachycormiformes

Pachycormiformes; Temporal range: Early Jurassic - Late Cretaceous, Toarcian–Maastrichtian PreꞒ Ꞓ O S D C P T J K Pg N
	Skeleton of Pachycormus
	Skeleton of Orthocormus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Clade:	Teleosteomorpha
Order:	†Pachycormiformes; Berg 1937
Family:	†Pachycormidae; Woodward, 1895
Type genus
	Pachycormus; Agassiz, 1833
Genera
	See text
Synonyms
	Diphyodontidae Jordan, 1923; Erisichtheidae Cope, 1877b; Microlepidoti Zittel, 1887; Pelecopteridae Cope, 1875; Protosphyraenidae Lydekker, 1889; Sauropsidae Cope, 1877a; Saurotomini [Saurostomini] Bonaparte, 1846 corrig. Bonaparte 1850a;

Pachycormiformes is an extinct order of marine ray-finned fish. They lived in the the early Jurassic period to the end of the Cretaceous. It only includes a single family, the Pachycormidae. They were characterized by having serrated pectoral fins (though more recent studies demonstrated that fin shape diversity in this group was high^[2]), reduced pelvic fins and a bony rostrum.

Relationships

Pachycormiformes were probably members of the Teleosteomorpha. This was a group which includes all fish more closely related to modern teleosts than to Holostei. This is a group which includes the bowfin and gars.

Taxonomy

Euthynotus Wagner, 1860
Haasichthys Delsate, 1999
Notodectes Dolgopol de Saez, 1949
Pseudoasthenocormus
Sauropsis Agassiz, 1843
Hypsocorminae Vetter, 1881
- Australopachycormus Kear, 2007
- Hypsocormus Wagner, 1860
- Kaykay Gouiric-Cavalli & Arratia, 2022
- Orthocormus Weitzel, 1930
- Protosphyraena Leidy, 1857
- Simocormus Maxwell et al., 2020
Asthenocorminae Cooper et al., 2022
- Germanostomus Cooper et al., 2022
- Ohmdenia Hauff, 1953
- Pachycormus Agassiz, 1833
- Saurostomus Agassiz, 1843
- Suspension-feeding clade
  - Asthenocormus Woodward, 1895
  - Bonnerichthys Friedman et al., 2010
  - Leedsichthys Woodward, 1889
  - Martillichthys Liston, 2008
  - Rhinconichthys Friedman et al., 2010

Related pages

References

↑ van der Laan, R. (2018). "Family-group names of fossil fishes". European Journal of Taxonomy (466). doi:10.5852/ejt.2018.466.
↑ Liston, Jeff J.; Maltese, Anthony E.; Lambers, Paul H.; Delsate, Dominique; Harcourt-Smith, William E. H.; Heteren, Anneke H. van (2019-11-07). "Scythes, sickles and other blades: defining the diversity of pectoral fin morphotypes in Pachycormiformes". PeerJ. 7: e7675. doi:10.7717/peerj.7675. ISSN 2167-8359. PMC 6842561. PMID 31720097.{{cite journal}}: CS1 maint: unflagged free DOI (link)

[van_der_Laan2018-1] van der Laan, R. (2018). "Family-group names of fossil fishes". European Journal of Taxonomy (466). doi:10.5852/ejt.2018.466.

[2] Liston, Jeff J.; Maltese, Anthony E.; Lambers, Paul H.; Delsate, Dominique; Harcourt-Smith, William E. H.; Heteren, Anneke H. van (2019-11-07). "Scythes, sickles and other blades: defining the diversity of pectoral fin morphotypes in Pachycormiformes". PeerJ. 7: e7675. doi:10.7717/peerj.7675. ISSN 2167-8359. PMC 6842561. PMID 31720097.{{cite journal}}: CS1 maint: unflagged free DOI (link)

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