Cephalopods from the Middle Carboniferous of the Donets Basin (Luhansk region, Eastern Ukraine)

Six forms of cephalopods are described from Middle Carboniferous deposits (Man-drykinka and Mospinska Formations) of the Donets Basin. The collection includes three nautiloids: a new species Millkoninckioceras udovichenkoi sp. nov., Peripetoceras cf. globatoides Shimansky, and Ephippioceras wildi Hind. The latter was previously known only from Westphalian deposits of Britain. In the body chamber of Ephippioceras wildi a fossil was found that can be a part of jaw apparatus of this species. Peripetoceras globatoides, described by V. M. Shimansky from Serpu-khovian deposits of the central part of the East European Platform, was unknown for the Donets Basin before. A new species, Millkoninckioceras udovichenkoi, differs from other species of the genus by ornamentation consisting of the longitudinal ridges on the ventral-lateral bend, and some other morphological details, among which the most significant are the different shape of sutures, high and narrow whorls, and minor shell size. In addition, three ammonoids were described as Gas-trioceras cf. listeri (Sowerby), Gastrioceras lupinum A. Popov, and Branneroceras branneri (Smith). The first species was mentioned earlier from the Donets Basin. The second one is probably endemic and it was indicated before from younger deposits. The find of Branneroceras branneri is the first reliable indication of its presence in the Carboniferous of the Donets Basin.

Abstract licence: CC BY-SA

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