Un serpent marin du genre Pterosphenus (Part sheppardi nov. sp.) dans l'Eocene superieur de l'Equateur (Amerique du Sud)

1 January 1958

journal article
Published by EDP Sciences in BSGF - Earth Sciences Bulletin

Vol. S6-VIII (1) , 45-50
https://doi.org/10.2113/gssgfbull.s6-viii.1.45

Abstract

Describes a new marine snake, Pterosphenus sheppardi from upper Eocene localities of Ecuador. This species is less specialized than contemporaneous northern forms (known only from Alabama and north Africa). It is concluded that Pterosphenus cannot have derived from specialized forms of Palaeophis, such as P. typhaeus, but from an earlier form such as P. toliapicus. Differentiation into species was divergent rather than linear.

Keywords

DIFFERENTIATION
AFRICA
ECUADOR
GENRE
SUD
CONTEMPORANEOUS
PTEROSPHENUS
L'EOCENE
SHEPPARDI

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