Bulinus opalinus Sowerby I, 1833

Breure, Abraham S. H. & Ablett, Jonathan D., 2015, Annotated type catalogue of the Megaspiridae, Orthalicidae, and Simpulopsidae (Mollusca, Gastropoda, Orthalicoidea) in the Natural History Museum, London, ZooKeys 470, pp. 17-143 : 39

Bulinus opalinus Sowerby I, 1833 Figs 22iv-v, L15i

Bulinus opalinus Sowerby I 1833 in Sowerby I and II 1832-1841: 7, fig. 47; Sowerby I in Gray and Sowerby I 1839: 144, pl. 38 fig. 8.

Bulimus opalinus ; Pfeiffer 1848b: 107.

Leiostracus perlucidus ; Simone 2006: 123, fig. 384.

Type locality.

“Brazil”.

Label.

“Brazil”, taxon label in Pfeiffer’s handwriting. M.C. label style IV.

Dimensions.

Not given. Figured specimen H 27.8, D 14.3, W 7.4.

Type material.

NHMUK 1975442, three probable syntypes (Cuming coll.).

Remarks.

Sowerby did not state on how many specimens his description was based; he wrote “Nob.”, thus “ours”, meaning the author claimed his right as describer of the new taxon, not necessarily proof of presence in his own collection. As Breure and Ablett (2011: 10) suggested that these might have been swapped with Cuming, the three specimens found are treated as probable syntypes. They are accompanied by two labels in Pfeiffer’s handwriting; one "Bul. opalinus / Sow", the other in different ink "perlucidus Spix". In Pfeiffer 1848: 108 the dimensions "Long. 27, diam. 14 mill." were given; this corresponds to the largest specimen in the lot. The citation in Richardson (1995: 207) to "Pfeiffer, Mono. Helic. Viv. 1: 231" refers to Helix opalina Sowerby I, 1841, and is thus in error. The current systematic position follows Simone (2006).

Current systematic position.

Simpulopsidae , Leiostracus perlucidus (Spix, 1827).