Peraiocynodon Simpson, 1928

Sigogneau-Russell, Denise, 2003, Docodonts from the British Mesozoic, Acta Palaeontologica Polonica 48 (3), pp. 357-374 : 359

Genus Peraiocynodon Simpson, 1928

Type species: P. inexpectatus Simpson, 1928

Revised diagnosis.—Differs from all other genera by the relative narrowness of the lower molars and the development and detachment of the disto−labial cusp (labial talonid cusp). Shares with Docodon and Simpsonodon the presence of furrows and ridges on the enamel. Shares with Docodon the absent or weak mesio−lingual cusp, the partial fusion of the lingual talonid cusp and of the disto−lingual cusp; but differs by the less developed lingual ridge, the more posterior situation of the disto−lingual cusp and the more oblique posterior slope. Differs from Simpsonodon mainly by the absence of a pseudo−talonid and of a mesio−lingual cusp. Differs from Borealestes and Haldanodon by the ornamentation of the enamelon the posterior face of the main cusp, by the even more reduced mesio−lingual cusp and the high development of the labial talonid cusp.