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Tambachia
Tambachia is an extinct genus of dissorophoid temnospondyl within the family Trematopidae. It is known from the Early Permian Tambach Formation (the lowermost unit of the Upper Rotliegend) near the town of Tambach-Dietharz in Thuringia, Germany. Tambachia is the first trematopid to have been discovered outside the United States.
The skull of MNG 7722 is severely crushed dorsoventrally, making it hard to determine the shape of the skull in lateral view. It is 6.9 centimetres (2.7 in) in length, which is small for a trematopid. The orbits, or eye sockets, are centrally placed so that the preorbital length of the skull is equal to that of the postorbital length. They make up around 30% of the skull length. The skull table seems to extend posteriorly past the level of the jaw articulation in Tambachia, which is unique among trematopids. However, this is likely to have been the result of crushing of the skull, which displaced the skull table.
Tambachia, like other trematopids, likely possessed a salt gland similar to those seen in modern reptiles. The subdivision of the external naris into anterior and posterior portions is evidence of the presence of salt glands. The anterior portion is sub-circular and is thought to be the true narial opening. The posterior portion likely held the salt gland. The expansion of the posterior portion may not be an accommodation for the salt gland, but rather a means of coping with cranial stresses during feeding.
The postcranial skeleton is well known in Tambachia, given the completeness of the holotype specimen. The relatively short tail, preserved only as a faint impression in MNG 7722, is 8.5 centimetres (3.3 in) long. The limbs are short, with four digits on the manus, or hand, and five digits on the pes, or foot. It is possible that the manus possessed five digits, since Acheloma, another closely related trematopid, has been described as having five distal carpals. In the pes of the holotype specimen, there are only four digits preserved. However, since the third preserved digit is the longest, it likely represents the fourth digit, with the first digit absent due to imperfect preservation. The terminal phalanges of Tambachia were narrow, and would have been the core supports of claws.
Тамбахия (Tambachia trogalles) – из ранней перми (вольфкамп) Германии. Это единственный трематопид, найденный вне Северной Америки. Тамбахия входит в знаменитую фауну Бромакера. Мелкое животное, с длиной черепа около 5 см, с короткой мордой и большими глазами.
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Tags: Вымершие амфибии, Лабиринтодонты, Пермь, Темноспондилы
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