Tadzhikosuchus

Tadzhikosuchus is an extinct genus of crocodylomorph that may have been a crocodylid eusuchian. To date it is mostly known from partial dentaries that show it to have been very similar to Diplocynodon, if not the same genus. The two are differentiated by subtle differences in tooth position and tooth socket shape, and by differences in stratigraphy (Diplocynodon was a Tertiary genus). Three species have been named: the type species T. macrodentis from the lower Santonian-age Upper Cretaceous Yalovach Svita of Kansai, in the Fergana Basin of Tadzhikistan, as described by Efimov in 1982; T. neutralis from the same location, by Efimov in 1988; and T. kizylkumensis from Turonian-age rocks of the Upper Cretaceous Bissekty Formation of Dzharakhuduk, Uzbekistan, by Nessov and colleagues in 1989. However, a 2000 review by Glenn Storrs and Mikhail Efimov could not differentiate between the species based on their type material, and recommended using T. macrodentis for the specimens of all three species. They also could not determine how Tadzhikosuchus and the contemporaneous Zhyrasuchus were related, or even if they were synonyms, due to the poor fossils available.