Pachycormidae

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
Size chart of notable genera
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: †Pachycormiformes
Family: †Pachycormidae
Woodward, 1895
Genera

Phylogeny

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

 
 
 
 
 
 
 
 
 
 
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gollark: Interesting.
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gollark: [DATA REDACTED]

References
  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.


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