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Mammals from the mid-Cretaceous Khodzhakul Formation, Kyzylkum Desert, Uzbekistan

Summary: Mammals from the mid-Cretaceous Khodzhakul Formation,
Kyzylkum Desert, Uzbekistan
Alexander Averianov a
, J. David Archibald b,*
Zoological Institute, Russian Academy of Sciences, Universitetskaya nab. 1, 199034, Saint Petersburg, Russia
Department of Biology, San Diego State University, San Diego, CA 92182-4614, USA
Received 21 June 2004; accepted in revised form 1 March 2005
Available online 12 September 2005
Six localities in the mid-Cretaceous (early Cenomanian) Khodzhakul Formation, western Kyzylkum Desert, Uzbekistan,
produced mammalian remains of a possible zalambdalestoid (Bobolestes), a possible zalambdalestid, and two (Sheikhdzheilia rezvyii,
gen. et sp. nov. and Eozhelestes mangit) or three zhelestids (``Zhelestidae'' indet., unnamed large sp. A). This is termed the
Sheikhdzheili local fauna. Previously, these mammals were recognized only as being three eutherians of uncertain affinities
(Bobolestes, Otlestes, and Oxlestes) and a possible zhelestid (Eozhelestes). The reinterpretation of Bobolestes including ``Otlestes'' as
a synonym could have an impact on phylogenetic reconstructions of basal Eutheria. With five eutherian species occurring at about
95 million years ago (early Cenomanian), the Sheikhdzheili local fauna is the earliest mammalian fauna to have more than two
species of eutherian. European CampanianeMaastrichtian Lainodon and Labes, which have been argued to be zhelestids (and the
hadrosaurid Telmatosaurus), retain ancestral traits reminiscent of earlier, early Cenomanian Asian taxa such as those in the


Source: Archibald, J. David - Department of Biology, San Diego State University


Collections: Biology and Medicine; Geosciences