Pachycormidae

Pachycormidae Temporal range: Late Triassic to Late Cretaceous
250px
Hypsocormus
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	†Pachycormiformes
Family:	†Pachycormidae
Genera
Asthenocormus Bonnerichthys Eugnathides Euthynotoides Euthynotus Hypsocormus Leedsichthys Orthocormus Pachycormus Prosauropsis Protosphyraena Rhinconichthys Sauropsis Saurostomus

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, reduced pelvic fins and a bony rostrum. Certain members of the group were large filter-feeding planktivores. Their relations with other fish are unclear.

Phylogeny

Cladogram after Friedman et al. (2010).

†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

Gallery

• Pachycormus.jpg

  Pachycormus

• Leedsichtys092.jpg

  Leedsichthys

Sources/external links

• http://www.courtenaymuseum.ca/paleo/paleo/pachycor.html
• http://www.palaeos.com/Vertebrates/Units/100Neopterygii/100.600.html
• http://www.sciencemag.org/cgi/data/327/5968/990/DC1/1