Bellamya Jousseaume, 1886

Zhang, Le-Jia & von Rintelen, Thomas, 2021, The neglected operculum: a revision of the opercular characters in river snails (Caenogastropoda: Viviparidae), Journal of Molluscan Studies 87 (2), pp. 1-14 : 8

publication ID	https://doi.org/10.1093/mollus/eyab008
DOI	https://doi.org/10.5281/zenodo.15098421
persistent identifier	https://treatment.plazi.org/id/74498794-FF80-E419-FC1A-2F29FC6D0284
treatment provided by	Carolina
scientific name	Bellamya Jousseaume, 1886
status

Treatment

Bellamya Jousseaume, 1886 View in CoL

Examined species: Bellamya phthinotropis (Martens, 1892)

( Figs 4H View Figure 4 , 5H View Figure 5 , 7H View Figure 7 );

B. trochlearis Martens, 1892 ( Figs 4I View Figure 4 , 5I View Figure 5 , 7I View Figure 7 ).

Remarks: Bellamya can be distinguished from other genera with a concentric inverted-comma-shaped operculum by the following combination of characters: opercular height almost as same as width; a small, smooth shiny nuclear region; and a thin and narrow marginal region.

The operculum of B. trochlearis differs from that of the other species examined, B. phthinotropis , by having a more notably convex outer margin—this fits the shape of the aperture and has a strong keel.