Pseudobaikalia, Lindholm, 1909

Sitnikova, Tatiana, Kovalenkova, Maria, Peretolchina, Tatiana & Sherbakov, Dmitry, 2016, A new, genetically divergent species of Pseudobaikalia Lindholm, 1909 (Caenogastropoda, Baicaliidae), ZooKeys 593, pp. 1-14 : 4

Taxon classification Animalia Littorinimorpha Baicaliidae

Genus PSEUDOBAIKALIA Lindholm, 1909

Baikalia (Pseudobaikalia) Lindholm, 1909: 42. Type-species: Baikalia jentteriana 1909 (by original designation).

Baicalia (Pseudobaicalia) : Kozhov 1936: 85 (type species Baikalia contabulata Dybowski, 1875).

Pseudobaikalia : Sitnikova 1991: 285 (female reproductive system morphology); Sitnikova et al. 2004: 947 (type species Baicalia jentteriana , species composition); Kantor et al. 2010: 28 (type species Baikalia jentteriana , list of species).

Diagnosis.

Shell elongated, height up to 10 mm at 5-6 well rounded or shouldered whorls, smooth or with transverse fine ribs, oval aperture with simple evenly rounded outer lip, without umbilicus, protoconch discoidal, lateral radular teeth with square face, its width equal to length of outer wing; length of capsule gland equal to albumen gland, loop of oviduct long, reaching the proximal end of albumen gland, oviduct loop a cluster that includes from 2-7 'tube-like evaginations’, sometimes beyond the albumen gland.

Remarks.

The earlier diagnosis of genus (subgenus) Pseudobaikalia involved only conchiological traits ( Lindholm 1909, Kozhov 1936) or morphology of reproductive system ( Sitnikova 1991). Presently, the morphological details obtained from our study of Pseudobaikalia michelae sp. n. and early published data on radular teeth ( Kozhov 1936) and protoconchs ( Sitnikova et al. 2001) conform to the emended diagnosis of the genus Pseudobaikalia . Besides Pseudobaikalia michelae sp. n. the genus includes Baikalia jentteriana , Lindholm, 1909, Baikalia contabulata (Dybowski, 1875), Baikalia pulla pulla (Dybowski, 1875) (= Baikalia subcilindrica Lindholm, 1909), Pseudobaikalia pulla tenuicosta (Lindholm, 1909), Pseudobaikalia elegantula (Lindholm, 1909), Pseudobaikalia cancellata (Lindholm, 1909), and Pseudobaikalia zachwatkini (Kozhov, 1936). The shell photos of the types of these earlier described species are presented here for the first time (Fig. 2 D–K).