''Ptychotrygon'' is a genus of

sawfish Sawfish, also known as carpenter sharks, are a family of very large rays characterized by a long, narrow, flattened rostrum, or nose extension, lined with sharp transverse teeth, arranged in a way that resembles a saw. They are among the lar ...

-like ray whose fossils have been found worldwide from the

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 143.1 to 66 mya (unit), million years ago (Mya). It is the third and final period of the Mesozoic Era (geology), Era, as well as the longest. At around 77.1 million years, it is the ...

period (

Albian The Albian is both an age (geology), age of the geologic timescale and a stage (stratigraphy), stage in the stratigraphic column. It is the youngest or uppermost subdivision of the Early Cretaceous, Early/Lower Cretaceous epoch (geology), Epoch/s ...

Maastrichtian The Maastrichtian ( ) is, in the International Commission on Stratigraphy (ICS) geologic timescale, the latest age (geology), age (uppermost stage (stratigraphy), stage) of the Late Cretaceous epoch (geology), Epoch or Upper Cretaceous series (s ...

). Along with '' Ptychotrygonoides'', '' Texatrygon'', and ''

Asflapristis ''Asflapristis'' is an extinct genus of ptychotrygonid sclerorhynchoid that lived during the Late Cretaceous. It contains two valid species: ''A. cristadentis'' from the Akrabou Formation of Morocco and ''A. rugosa'' from the Eutaw Formation ...

'', it is the member of the family Ptychotrygonidae within the

suborder Order () is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between family and class. In biological classification, the order is a taxonomic rank used in the classification of organisms and recognized ...

Sclerorhynchoidei Sclerorhynchoidei is an extinct suborder of Rajiformes, rajiform Batoidea, rays that had long Rostrum (anatomy)#Vertebrates, rostra with large Fish scale#Placoid scales, denticles similar to Sawfish, sawfishes and Sawshark, sawsharks. This featu ...

Species

The following species are considered valid: * †''Ptychotrygon ameghinorum'' * †''Ptychotrygon blainensis'' * †''Ptychotrygon eutawensis'' * †''Ptychotrygon geyeri'' * †''Ptychotrygon mcnultyi'' * †''Ptychotrygon nazeensis'' * †''Ptychotrygon pustulata'' * †''Ptychotrygon rostrispatula'' * †''Ptychotrygon striata'' * †''Ptychotrygon triangularis'' * †''Ptychotrygon vermiculata''

References

Prehistoric cartilaginous fish genera Late Cretaceous cartilaginous fish Late Cretaceous fish of North America Sclerorhynchoidei Fossil taxa described in 1894 {{paleo-rajiformes-stub