Pachycormiformes

Pachycormiformes is an extinct order of ray-finned fish known from Mesozoic deposits from Eurasia and the Americas. They were characterized by having serrated pectoral fins (though more recent studies demonstrated that fin shape diversity in this group was high[1]), reduced pelvic fins and a bony rostrum. Their relations with other fish are unclear.

Pachycormiformes
Temporal range: Late Triassic - Late Cretaceous, 228–66 Ma
Hypsocormus of the Pachycormidae
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Division: †Aspidorhynchei
Order: †Pachycormiformes
Berg 1937
Families
Protosphyraena perniciosa

Some sources place Ichthyodectidae herein too, but these seem to be somewhat more advanced Teleostei.

Taxonomy
  • Order †Pachycormiformes Berg 1937 [Pachycormida][2][3][4]
    • Family †Archaeomaenidae Boulenger 1904a [Aphnelepididae Wade 1941; Aetheolepididae Wade 1941]
    • Family †Koonwarriidae Waldman 1971
    • Family †Pachycormidae Lydekker 1889 [Protosphyraenidae Cope 1875; Erisichtheidae Cope 1877; Pelecopteridae Cope 1875; Saurostomini Bonaparte 1846 corrig. Bonaparte 1850a; Sauropsidae Cope 1877a; Microlepidoti Zittel 1887]
      • Genus ?†Atacamichthys Arratia & Schultze 1987
      • Genus ?†Bobbichthys Arratia 1986
      • Genus ?†Cephenoplosus le Sauvage 1874
      • Genus ?†Eugnathides Gregory 1923
      • Genus ?†Haasichthys Delsate 1999
      • Genus ?†Hengnania Wang 1977
      • Genus ?†Pholidophoroides Woodward 1941
      • Genus ?†Pholidophoropsis Nybelin 1966
      • Genus ?†Prymnetes Cope 1871
      • Genus ?†Pseudoasthenocormus (Eastman 1911) Lambers 1999
      • Genus ?†Seefeldia Nybelin 1974
      • Genus ?†Prosauropsis (von Münster 1842) le Sauvage 1893
      • Genus ?†Sauropsis Agassiz 1832 [Diplolepis Vetter 1881 non Geoffryoy 1762 non Fabricius 1805 non Steindachner 1863; Parathrissops le Sauvage 1891 non Eastman 1914]
      • Genus ?†Saurostomus Agassiz 1843
      • Genus †Euthynotus Wagner 1860 [Heterothrissops le Sauvage 1875; Pseudothrissops Sauvage 1875]
      • Genus †Hypsocormus Wagner 1860
      • Genus †Orthocormus Weitzel 1930
      • Genus †Australopachycormus Kear 2007
      • Genus †Protosphyraena Leidy 1857 [Erisichthe Cope 1872; Pelecopterus Cope 1875]
      • Genus †Pachycormus Agassiz 1833 non Coville ex Standley 1923 [?Pachylepis Quenstedt 1858 non Pander 1856; ?Lycodus Quenstedt 1856]
      • Genus †Martillichthys Liston 2008
      • Genus †Asthenocormus Woodward 1895 [Agassizia Vetter 1881 non Agassiz & Desor 1847 non Behr 1870 non Yoshiyasu 1987]
      • Genus †Bonnerichthys Friedman et al. 2010
      • Genus †Leedsichthys Woodward 1889 [Leedsia Woodward 1890]
      • Genus †Rhinconichthys Friedman et al. 2010
  • http://www.courtenaymuseum.ca/paleo/paleo/pachycor.html
  • https://web.archive.org/web/20081025044133/http://www.palaeos.com/Vertebrates/Units/100Neopterygii/100.600.html
  • Sepkoski, Jack (2002). "A compendium of fossil marine animal genera". Bulletins of American Paleontology. 363: 1–560. Retrieved 2011-05-17.
  • "Pachycormiformes". Paleobiology Database. Retrieved November 11, 2012.

References
  1. https://peerj.com/articles/7675/
  2. Haaramo, Mikko (2007). "†Pachycormiformes". Mikko's Phylogeny Archive. Retrieved 30 December 2016.
  3. Nelson, Joseph S.; Grande, Terry C.; Wilson, Mark V. H. (2016). Fishes of the World (5th ed.). John Wiley & Sons. ISBN 9781118342336.
  4. van der Laan, Richard (2016). "Family-group names of fossil fishes". Cite journal requires |journal= (help)
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