Arguimus Dashzeveg, 1979

Lopatin, Alexey & Averianov, Alexander, 2006, Revision of a pretribosphenic mammal Arguimus from the Early Cretaceous of Mongolia, Acta Palaeontologica Polonica 51 (2), pp. 339-349 : 340

Arguimus Dashzeveg, 1979

= Arguitherium Dashzeveg, 1994

Type species: Arguimus khosbajari Dashzeveg, 1979 . Mongolia, Early Cretaceous .

Included species: Type species only.

Revised diagnosis.—Differs from crown−group Zatheria in having four rather than three molars and in lack of a hypoconulid. Additionally, differs from Peramus Owen, 1871 in the deeper dentary lacking Meckel’s groove and from Tendagurutherium Heinrich, 1998 by lack of Meckel’s groove and coronoid. Differs from Amphitherium de Blainville, 1838 in having smaller number of molars (four versus six−seven), incipient talonid basin on lower molars, and lack of Meckel’s groove. Differs from Nanolestes Martin, 2002 in having four rather than five lower molars, in having an incipient talonid basin, and in a deeper dentary lacking Meckel’s groove. Differs from Minimus Sigogneau−Russell, 1999 by longer talonid on lower molars. Differs from Chunnelodon Ensom and Sigogneau−Russell, 1998 in having a shorter talonid with incipient talonid basin and lower metaconid on m1. Differs from Vincelestes Bonaparte, 1986 in having a larger number of lower premolars (five versus two) and molars (four versus three), the last premolar smaller than m1, and longer molar talonids.