A New Extinct Emydid Turtle from the Lower Pliocene of Oklahoma — John Shaqi
A New Extinct Emydid Turtle from the Lower Pliocene of OklahomaGalbreath, Edwin C. (Edwin Carter)
Science
A New Extinct Emydid Turtle from the Lower Pliocene of Oklahoma
Galbreath, Edwin C. (Edwin Carter)
Turtles, Fossil -- Oklahoma
Femoral scute: Length of border of scute on midline, 24; width of
anterior border of scute from midline to inguinal notch, 41; width of
posterior border of scute from midline to outer border (along sulcus),
40; length of outer margin of scute from inguinal notch to femoro-anal
sulcus, 46.
Anal scute: Length of margin at midline, 36; length of femoro-anal
sulcus, 40.
_Remarks._--Noteworthy is the intermediate nature of _C. limnodytes_
when compared with species of the genera _Chrysemys_ and _Pseudemys_.
However, any resemblance to _Pseudemys_ is not to be considered as
evidence that _C. limnodytes_ is in any way ancestral to the genus
_Pseudemys_. The fossil specimens of _Pseudemys_ from the Pliocene are
too poorly known to allow the student certainly to place them in their
correct systematic positions. The fossil Emydids from Western Europe,
listed as species of _Chrysemys_, differ very much from this species, or
belong to other genera of the family.
Only a few turtles are known from the Laverne formation. Hesse (Chaney
and Elias, 1936) reported a small _Testudo_ from the Laverne of Beaver
County, Oklahoma, but neglected to state whether it was among the
material borrowed by him from the University of Kansas Museum of Natural
History. The Museum has an incomplete carapace and plastron (No. 3101)
of a small _Testudo_ from that locality and formation. In Harper County,
Oklahoma, the field party from the University recovered a large number
of fragments of a large _Testudo_. Although this specimen is as yet
unprepared, enough fragments have been pieced together to reveal that
the tibia is 127 mm. long. This dimension and those of some of the
fragments indicate that the animal may have been four to five feet long.
Mrs. Bernita Mansfield of the Geology Department, University of Kansas,
prepared the plate.
LITERATURE CITED
BERGOUNIOUX, FREDERIC-MARIE.
1935. Contribution a l'etude paleontoligique des cheloniens:
Cheloniens fossiles du Bassin d'Aquitaine. Memoires de la
Societe geologique de France, vol. 11, Mem. 25, pp. 1-215,
44 figs., 16 pls.
1937. Relations fauniques entre des chelonien fossiles de l'Espagne
et de la France. Comptes Rendus Acad. Sci. Paris, vol. 204,
pp. 793-795.
1938. Cheloniens fossiles d'Espagne. Bulletin de la Societe
d'histoire Naturelle de Toulouse, vol. 72, pp. 257-288,
7 figs.
CHANEY, R. W., and ELIAS, M. K.
1936. Late Tertiary Floras from the High Plains, with a Chapter
on the Lower Pliocene Vertebrate Fossils from the Ogallala
Formation (Lavern Zone) of Beaver County, Oklahoma, by
Curtis J. Hesse. Publ. Carnegie Inst. Wash., No. 476,
pp. 1-72, 11 figs., 7 pls.
FRYE, J. C., and HIBBARD, C. W.
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