pp. 73 -

The Antarctic genus Guyvalvoria Vayssière, 1906 is revised. The type species of the genus, G. francaisi Vayssière, 1906 is redescribed based on the study of the type and new material. Two new species of the genus Guyvalvoria, G. gruzovi sp. nov. and G. savinkini sp. nov. are described from the Davis Sea and Subantarctic Kerguelen Island. In addition, a new genus and species, Murmania antiqua gen. et sp.nov. is described from off the Murman coast of the Barents Sea (depth 60-300 m). The latter taxon is characterized by a wide body, numerous branched rows of the digestive gland and moderately developed notal rim with an elevated ridge. Radular teeth of Murmania antiqua possess unusual clusters of lateral denticles. The Antarctic genus Guyvalvoria and Subarctic genus Murmania gen. nov. have some similarities in the external appearance, presence of numerous branches of the digestive gland and a tendency to shift of the anus caudally. Morphological peculiarities of the new taxon suggest a new interpretation of the head composition in the family Tergipedidae: the tergipedid head is formed with involving of the postoral lobes of the anterior foot, as distinct from the “typical head”, characteristic of most aeolidacean nudibranchs. This conclusion is supported by a number of examples from the family Tergipedidae and other families of the aeolidaceans. Both Murmania gen. nov. and Guyvalvoria Vayssière, 1906 are considered as one of most basal within the Tergipedidae; transformations of the digestive gland within the family are discussed. Ревизован антарктический род Guyvalvoria Vayssière, 1906.

Архаичные Tergipedidae Арктики и Антарктики: Murmania antiqua gen. et sp. nov. и ревизия рода Guyvalvoria Vayssière с описанием двух новых видов
Мартынов А.В.;