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

1979; Institute of Paleobiology; Volume: 24; Issue: 2 Linguagem: Inglês

1732-2421

Demberelyin Dashzeveg,

Ichthyology and Marine Biology

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.