17. TRIÁSICO I (LOS COMIENZOS DE UN NUEVO REINO) (PARA MÁS INFORMACIÓN, LEER LA DESCRIPCIÓN)
Tsylmosuchus is an extinct genus of archosauriform reptile. It is known from the southern Urals region of Russia. Tsylmosuchus occurred throughout the Olenekian age of the Early Triassic. Some of the strata from which Tsylmosuchus has been found are Induan in age, making it one of the earliest archosaurs. The genus is named after the Tsilma River, near where fossils have been found. Three species have been named, all based on single incomplete specimens: the type species T. jakovlevi, T. samariensis, and T. donensis. Tsylmosuchus was originally classified among crocodile-line archosaurs (pseudosuchians) as part of the family Rauisuchidae; however, the fragmentary remains do not show any of the distinguishing features of rauisuchids or even pseudosuchians in general, so Tsylmosuchus has more recently been interpreted as an indeterminate archosauriform. Given the lack of diagnostic material for the three species that have been named, they are also probably not distinct from each other.
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