Riabininus

From Palaeos

Riabininus is a single-tooth-rowed captorhinid coming from Upper Permian deposits of the northern forelands of the Urals (Pechora, Komi Republic, Russia). Its type and only species R. uralensis was originally described as an edaphosaurid and is known from three dentary bones and one isolated premaxillary. Due to absence of distinctive differences to other single-rowed forms in this rather poorly preserved material, Modesto & Rybczynski (2000) declared Riabininus a Captorhinidae indet., i.e. a captorhinid that can neither be assigned to a new nor to a known genus.

References

IVAKHNENKO, M.F. (1990): Early Permian Elements of Faunal Assemblages of Tetrapods from Eastern Europe [Раннепермские элементы фаунистических комплексов тетрапод Восточной Европы]. Paleontol. Zh., 1990(2), pp. 102-111 [russian]
MODESTO, S.P. and RYBCZYNSKI, N. (2000): The amniote faunas of the Russian Permian: implications for Late Permian terrestrial vertebrate biogeography. pp. 18-34 in M. J. BENTON et al. (eds.): The Age of Dinosaurs in Russia and Mongolia. Cambridge University Press, Cambridge, UK