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Pachycormidae is an extinct family 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. Certain members of the group were large filter-feeding planktivores. Their relations with other fish are unclear.

Pachycormidae
Temporal range: Late Triassic to Late Cretaceous
Pachycormidae assortment.png
Size chart of notable genera
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Pachycormiformes
Family: Pachycormidae
Woodward, 1895
Genera

PhylogenyEdit

Cladogram after Friedman et al. (2010).[2]

Pteronisculus

Discoserra pectinodon

Watsonulus eugnathoides

Macrepistius rostratus

Caturus

Amia calva

Lepisosteus platostomus

Macrosemius rostratus

Semionotus elegans

Lepidotes

Pholidophorus bechei

Elops hawaiensis

Hiodon alosoides

 Pachycormidae 

Euthynotus

Hypsocormus insignis

"Hypsocormus" tenuirostris

Orthocormus

Australopachycormus hurleyi

Protosphyraena

Pachycormus

Asthenocormus titanius

Martillichthys renwickae

Bonnerichthys gladius

Leedsichthys problematicus

Rhinconichthys taylori

GalleryEdit

Sources/external linksEdit

ReferencesEdit

  1. ^ https://peerj.com/articles/7675/
  2. ^ Matt Friedman; Kenshu Shimada; Larry D. Martin; Michael J. Everhart; Jeff Liston; Anthony Maltese; Michael Triebold (2010). "100-million-year dynasty of giant planktivorous bony fishes in the Mesozoic seas". Science. 327 (5968): 990–993. doi:10.1126/science.1184743. PMID 20167784.