Ptychotrygon
Extinct genus of cartilaginous fishes
From Wikipedia, the free encyclopedia
Ptychotrygon is a genus of sawfish-like ray whose fossils have been found worldwide from the Cretaceous period (Albian-Maastrichtian).[1] Along with Ptychotrygonoides, Texatrygon, and Asflapristis, it is the member of the family Ptychotrygonidae within the suborder Sclerorhynchoidei.[2][3]
| Ptychotrygon Temporal range: | |
|---|---|
| |
| Ptychotrygon sp. oral teeth from the Cretaceous of Texas, USA | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Order: | Rajiformes |
| Suborder: | †Sclerorhynchoidei |
| Family: | †Ptychotrygonidae |
| Genus: | †Ptychotrygon Jaekel, 1894 |
| Species | |
|
See text. | |
Species
The following species are considered valid:[4][2]
- †Ptychotrygon ameghinorum
- †Ptychotrygon blainensis
- †Ptychotrygon eutawensis
- †Ptychotrygon geyeri
- †Ptychotrygon mcnultyi
- †Ptychotrygon nazeensis
- †Ptychotrygon pustulata
- †Ptychotrygon rostrispatula
- †Ptychotrygon striata
- †Ptychotrygon triangularis
- †Ptychotrygon vermiculata
