Racesina luteola (Lamarck, 1822)

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

23. Racesina luteola (Lamarck, 1822) Fig. 9I

Lymnaea luteola Lamarck 1822: 160.

Limnaeus cerasum Troschel 1837: 170.

Limnaeus impurus Troschel 1837: 172.

Limnaeus nucleus Troschel 1837: 171.

Limnaeus prunum Troschel 1837: 170.

Limnaea tigrina Dohrn 1858: 134.

Limnaea ovalior Annandale et al. 1921: 572, 573, fig. 13A; pl. VII, figs 4-6; Annandale and Rao 1925: 186.

Limnaea (Pseudosuccinea) luteola - Annandale and Rao 1925: 183, fig. IV(1-7), IX.

Limnaea (Pseudosuccinea) luteola f. impura - Annandale and Rao 1925: 184, fig. IV(7).

Limnaea (Pseudosuccinea) luteola f. australis - Annandale and Rao 1925: 184, fig. IV(3).

Limnaea (Pseudosuccinea) luteola f. ovalis - Annandale and Rao 1925: 184, fig. IV(4).

Limnaea (Pseudosuccinea) luteola f. succinea - Annandale and Rao 1925: 184, fig. IV(2).

Lymnaea (Radix) luteola - Brandt 1974: 232, pl. 16, fig. 98 (partim).

Lymnaea (Pseudosuccinea) luteola - Subba Rao 1989: 128, figs 275-287.

Lymnaea (Pseudosuccinea) ovalior - Subba Rao 1989: 129, fig. 285.

Lymnaea (Cerasina) luteola - Kruglov and Starobogatov 1993a: 85, fig. 10C.

Lymnaea (Cerasina) impura - Kruglov and Starobogatov 1993a: 85, fig. 10D, non Troschel 1837 (partim).

Cerasina luteola - Aksenova et al. 2018a: 4.

Racesina luteola - Vinarski and Bolotov 2018: 331.

TL.

India, Bengalia.

Types.

Not traced, probably in Muséum d’Histoire Naturelle, Genève, Switzerland.

A highly-variable species, with several intraspecific ‘morphs’ differing from each other by their shell shape and proportions ( Annandale and Rao 1925; Subba Rao 1989). The typical morph (see Fig. 9I ) has ovate shell with more or less prominent and wide spire and weakly-inflated body whorl. Aperture is moderately expanded. Shell surface is smooth and glossy. We had no fixed specimens of R. luteola for dissection; however, according to Hubendick (1951) and Kruglov (2005), the genital morphology of this species generally corresponds to that of the genus Radix , except for the drastically different internal structure of the prostate. Penis sheath is very narrow as compared to thick and oblong praeputium, ICA > 1.00 ( Hubendick 1951).

R. luteola inhabits India and Nepal ( Aksenova et al. 2018a). The recordings of this species from other countries such as China (south), Sri Lanka and the Andamanes ( Brandt 1974; Subba Rao 1989) need a molecular re-evaluation. The findings of " Lymnaea luteola " in Thailand and Myanmar ( Brandt 1974) belong most probably to R. siamensis (Sowerby).

Figures

Figure 9. Shells of species of the genera Ampullaceana, Kamtschaticana, Myxas, Tibetoradix, Racesina, Orientogalba and Bullastra. A. Ampullaceana relicta relicta (05.1975, Macedonia, a spring near St. Naum monastery, Ohrid Lake region; NHMW). B. A. r. pinteri, a paratype (05.06.1973, Macedonia, Prespa Lake near Perovo; MHMW). C, D. Kamtschaticana kamtschatica (Russia, Kamchatka Peninsula, Valley of Geysers; RMBH). E. Myxas glutinosa (14.09.1963, Kazakhstan, floodplain of the Tobol River near Kustanay City; ZISP). F, G. Tibetoradix hookeri, two syntypes (NHMUK). H. T. kozlovi, the holotype (ZISP). I. Racesina luteola (India, Bengal, Paksay, Pabna; NHMUK). J. R. oxiana (04.07.2016, Tajikistan, a roadside ditch near Kurban-Shakhid village; LMBI). K. R. siamensis (" Thailand "; ZMB). L. Orientogalba viridis, a syntype (Guam Island; NMNH). M. O. ollula (1883, Japan, Yokohama; NHMUK). N. Limnaea bowelli, a type (after Preston 1909). O. Orientogalba cf. bowelli (30.06.1924, China, Tibet, Lingka, 14,500 feet a. s. l.; NHMUK). P. Bullastra cumingiana (Philippine, Cebu Island; NHMUK). Scale bars: 2 mm (C, D, F-H, L, M, O), 5 mm (A, B, E, J-K, N, P).