Racesina Vinarski & Bolotov, 2018

Vinarski, Maxim V., Aksenova, Olga V. & Bolotov, Ivan N., 2020, Taxonomic assessment of genetically-delineated species of radicine snails (Mollusca, Gastropoda, Lymnaeidae), Zoosystematics and Evolution 96 (2), pp. 577-608 : 577

Genus Racesina Vinarski & Bolotov, 2018

Racesina Vinarski and Bolotov 2018: 332.

Type species.

Lymnaea luteola Lamarck, 1822.

Three species included into Racesina by Vinarski and Bolotov (2018), were previously treated as members of the (sub-) genus Cerasina Kobelt, 1881 ( Subba Rao 1989; Kruglov 2005; Aksenova et al. 2018a). As Vinarski and Bolotov (2018) have shown, the genus Cerasina sensu Kobelt is a junior synonym of Radix and a new generic name was proposed by these authors for Cerasina sensu auct. non Kobelt. The type species of the genus inhabits India and some adjacent countries. Despite some serious morphological peculiarities of Cerasina sensu Kruglov and Starobogatov (1993b), the validity of this taxon was rejected by most authors dealing with the South Asian malacofauna ( Annandale and Rao 1925; Hubendick 1951; Brandt 1974; Subba Rao 1989). Vinarski (2013; Vinarski and Kantor 2016) classified Cerasina as a separate genus within his subfamily Radicinae (see also Zhadin 1952). The results of the Aksenova et al. (2018a) molecular taxonomic study confirmed this opinion. The prostate with numerous (5-8) internal folds ( Hubendick 1951; Kruglov 2005) and a single synapomorphy to sharply distinguish Racesina from all other genera of radicine snails are discussed in this paper.