Pachycormiformes
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.
| Pachycormiformes Temporal range: Early Jurassic - Late Cretaceous,
| |
|---|---|
.JPG)
| |
| Skeleton of Pachycormus | |
| |
| Skeleton of Orthocormus | |
Scientific classification 
| |
| 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[1] | |
| |
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.
Pachycormiformes Media
Size comparison of various species of Pachycormiform fish
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.
Further Reading
- van der Laan, R. (2018). "Family-group names of fossil fishes". European Journal of Taxonomy (466). doi:10.5852/ejt.2018.466