A NEW PRE-DESEADAN PYROTHERE (MAMMALIA) FROM NORTHERN PERU AND THE
WEAR FACETS OF MOLARIFORM TEETH OF PYROTHERIA
RODOLFO SALAS1
, JOSÉ SÁNCHEZ2
, and CÉSAR CHACALTANA2
1
Museo de Historia Natural-UNMSM, Departamento de Paleontología de Vertebrados,...
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A NEW PRE-DESEADAN PYROTHERE (MAMMALIA) FROM NORTHERN PERU AND THE
WEAR FACETS OF MOLARIFORM TEETH OF PYROTHERIA
RODOLFO SALAS1
, JOSÉ SÁNCHEZ2
, and CÉSAR CHACALTANA2
1
Museo de Historia Natural-UNMSM, Departamento de Paleontología de Vertebrados, Avenida Arenales 1256, Lima 14, Perú,
rodsalasgis@yahoo.
com;
2
INGEMMET, Instituto Geológico, Minero y Metalúrgico, Avenida Canadá 1470, San Borja, Lima 41, Perú
ABSTRACT—Baguatherium jaureguii gen.
et sp.
nov.
from the early Oligocene of northern Peru is the best known
pre-Deseadan pyrothere.
It has a relatively wider palate and less oblique lophs on the molariform teeth than Pyrotherium
macfaddeni and Pyrotherium romeroi.
A conspicuous lingual crest connects the anterior and posterior lophs of molariform teeth.
Nares are retracted.
Phylogenetic analysis places Baguatherium with Gryphodon and Pyrotherium in an
unresolved polytomy.
In Proticia and Colombitherium the wear facets of the molariform teeth indicate
Less
