''Peritresius'' is an extinct genus of

sea turtle Sea turtles (superfamily Chelonioidea), sometimes called marine turtles, are reptiles of the order Testudines and of the suborder Cryptodira. The seven existing species of sea turtles are the flatback, green, hawksbill, leatherback, loggerh ...

from the

Late Cretaceous The Late Cretaceous (100.5–66 Ma) is the more recent of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''cre ...

deposits in the US Eastern Seaboard.

Taxonomy

Two species are known, ''Peritresius ornatus'' (Leidy, 1856) and ''P. martini'' Gentry, Parham, Ehret, and Ebersole, 2018, both from Campanian-Maastrichtian age deposits in New Jersey, Alabama, and Mississippi.Leidy J. Notices of remains of extinct turtles of New Jersey collected by Professor Cook of the State Geological Survey. Proceedings of the Academy of Natural Science, Philadelphia. 1856; 8: 303–304.

Phylogeny

Below is a

cladogram A cladogram (from Greek language, Greek ''clados'' "branch" and ''gramma'' "character") is a diagram used in cladistics to show relations among organisms. A cladogram is not, however, an Phylogenetic tree, evolutionary tree because it does not s ...

from the analysis of Gentry, Ebersole & Kiernan, 2019:

References

Cheloniidae Cretaceous turtles Extinct animals of the United States Prehistoric turtle genera Taxa named by Joseph Leidy Extinct turtles {{paleo-turtle-stub