THE NAUTILUS 110(3):77-93, 1997
Page 77
Cenozoic Biogeographic History of the Eurythermal Genus
Retrotapes, New Genus (Subfamily Tapetinae) from
Southern South America and Antarctica
Claudia Julia del Rio
Centre de Investigaciones en Recursos
Geologicos
Ramirez de Velazco 847
(1414) Buenos Aires ARGENTINA
and
Facultad de Ciencias Exactas y
Naturales
L'niversidad de Buenos Aires
Ciudad Universitaria
Pabellon 2
Nunez (1428) ARGENTINA
ABSTRACT
Retrotapes. new genus, comprises a group of Neoaustral bi-
valves that appeared in the southern circumpolar regions b\
the Eocene and ha\e since been confined to the high latitudes
of the southern hemisphere. Its presence in the Tertiar\ strata
of Antarctica and southern South America reflects an active
fauna! interchange between both regions during the Eocene.
Retrotapes is here proposed to include to those Recent and
Tertiarv representatives of the Subfamily Tapetinae (Family
Veneridae) from southern South .America and .Antarctica that
had been previous!) placed in Venus Linne. 1758, Marcia H.
and .
BioStor
