New species of large Tetraconodon (Mammalia, Artiodactyla, Suidae) from the late Miocene of Myanmar

We describe two new species of Tetraconodon, T. irramagnus sp. nov. and T. irramedius sp. nov., from the late Miocene of Myanmar recognized when reevaluating large Tetraconodon specimens. Tetraconodon had also been recovered from the late Miocene Siwalik sediments of India/Pakistan. However, in the Siwalik specimens, the dimensions of the last two premolars and the third molar with respect to those of the first molar are distinctly greater than those of the Myanmar specimens. In Myanmar species, the relative dental sizes are similar, and the most obvious interspecies distinctions are their dental size differences. Considering the variation in the relative sizes of the last two premolars and third molar with respect to the first molar among the Siwalik and Myanmar Tetraconodon, the enlargement of the last two premolars and the third molar could be regarded as a characteristic of the interspecies distinction