Acta Palaeontologica Polonica

Arguimus khosbajari gen.n., sp.n. (?Peramuridae, Eupantotheria) from the Lower Cretaceous of Mongolia

Demberelyin Dashzeveg

Acta Palaeontologica Polonica 24 (2), 1979: 199-204

Arguimus khosbajari gen.n., sp.n., assigned to the Peramuridae, is described on the basis of a single lower jaw with P2-M2, found at the locality of Khovboor (Guchin Us somon, Gobi Desert), Mongolia, in beds of presumable Aptian or Albian age. Arguimus khosbajari differs from the Upper Jurassic Peramus tenu!rostr!s in: 1) having a somewhat molarized P4 2) smaller paraconld on M2 3) absence of an entoconid on M1 and M2 4) lack of the dlastemas between the premolars, and 5) by a distinct asymmetry in lateral view of the lower premolars.

Key words: Asia, Eupantotheria, Gobi Desert, Lower Cretaceous, Mammals, Mongolia.

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