PERSONAL DE APOYO
REGUERO Marcelo Alfredo
congresos y reuniones científicas
Título:
A new South American ungulate (Mammalia: Litopterna) from
Autor/es:
BOND, M.; REGUERO, M.A.; VIZCAÍNO, S.F.; MARENSSI, S.A.
Reunión:
Simposio; International Symposium Antarctic Earth Sciences (ISAES); 2005
Institución organizadora:
British Antarctic Survey
Resumen:
Notolophus arquinotiensis, a new genus and species of the family Sparnotheriodontidae
(Mammalia, Litopterna), is represented by several isolated teeth from the
shallow-marine sediments of the La Meseta Formation (late EarlyLate Eocene) of
Seymour Island,Antarctic Peninsula, which have also yielded the youngest known sudamericids
and marsupials. The new taxon belongs to the extinct order of South American
native ungulate Litopterna characterized by the convergence of the later forms with the
equids and camelids. Notolophus arquinotiensis shows closest relationships with Victorlemoinea, a new genus and species of the family Sparnotheriodontidae
(Mammalia, Litopterna), is represented by several isolated teeth from the
shallow-marine sediments of the La Meseta Formation (late EarlyLate Eocene) of
Seymour Island,Antarctic Peninsula, which have also yielded the youngest known sudamericids
and marsupials. The new taxon belongs to the extinct order of South American
native ungulate Litopterna characterized by the convergence of the later forms with the
equids and camelids. Notolophus arquinotiensis shows closest relationships with VictorlemoineaNotolophus arquinotiensis shows closest relationships with Victorlemoinea
from the Itaboraian (middle Palaeocene) of Brazil and RiochicanVacan (late
Palaeoceneearly Eocene) of Patagonia,Argentina. Although still poorly documented, this
new taxon shows that the early Palaeogene Antarctic faunas might provide key data
concerning the problems of the origin, diversity and basal phylogeny of some of the South
American ungulates (Litopterna). This new taxon shows the importance of Antarctica in
the early evolution of the ungulates and illustrates our poor state of knowledge.