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Summary: New specimens of the multituberculate mammal Uzbekbaatar
from the Late Cretaceous of Uzbekistan
ALEXANDER O. AVERIANOV and J. DAVID ARCHIBALD
Uzbekbaatar Kielan-Jaworowska and Nessov, 1992 is among
the rarest mammals and the only multituberculate in the di-
verse, eutherian dominated Bissekty (Turonian) and Aitym
(?Coniacian) local faunas, Kyzylkum Desert, Uzbekistan.
New material from the Bissekty local fauna, suggests that
only one multituberculate species, Uzbekbaatar kizylkumen-
sis Kielan-Jaworowska and Nessov, 1992 is present in the
Bissekty fauna. A newly collected p4 is better preserved than
the holotype and demonstrates presence of the posterolabial
cusp in the p4 of Uzbekbaatar. New material of Uzbekbaatar
is consistent with placement of this taxon within the basal
cimolodontan "Paracimexomys group."
Introduction
The multituberculate mammal Uzbekbaatar kizylkumensis Kie-
lan-Jaworowska and Nessov, 1992 is one of the rarest mammals
in the rich and diverse Bissekty local fauna from the Late Creta-
ceous (Turonian) of the central Kyzylkum Desert, Uzbekistan
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