Helix tristis, Ferussac, 1825

Cowie, Robert H., Héros, Virginie, Yeung, Norine W. & Hayes, Kenneth A., 2016, Annotated catalogue of types of Hawaiian land and freshwater snails (Mollusca: Gastropoda) in the Muséum national d’Histoire naturelle, Paris, with lectotype designations, Zoosystema 38 (2), pp. 245-266 : 261

tristis Férussac, 1825 , Helix

( Fig. 5B )

Helix tristis Férussac in Quoy & Gaimard, 1825: 482, pl. 68, figs 6, 7.

Helix (Cochlogena) tristis – Férussac 1821a: 60; 1821b: 56 [nomen nudum].

CURRENT TAXONOMIC STATUS. — Amastrinae, Amastra (Amastrella) . Valid species.

TYPE MATERIAL. — Lectotype (here designated) MNHN IM-2000- 30843; paralectotypes MNHN IM-2000-30844 (2 spms).

TYPE LOCALITY. — “les îles Sandwich”.

REMARKS

Not treated by Deshayes (1851). A label associated with the specimens is a typical black-bordered label of the Férussac collection and states that they were received from “Gaudicho” (i.e. Gaudichaud); it therefore confirms that they were obtained during the Freycinet expedition. The labels to which the three specimens were once glued says “type” and “ Coll. Férussac 1837”. All three shells closely match Férussac’s illustrations, although one retains a significant amount of periostracum that is not shown in the illustrations. However, the other two are damaged, probably in the course of removing them from the label, so the undamaged specimen, with periostracum, is here selected as the lectotype ( MNHN IM-2000-30843) ; the remaining specimens in the original lot are paralectotypes ( MNHN IM-2000-30844) .

Figures

FIG. 5. — Amastridae: A, Helix textilis Férussac, 1825, possible syntype MNHN IM-2000-30770, 15.0 mm; B, Helix tristis Férussac, 1825, lectotype MNHN IM- 2000-30843, 19.3 mm, fig. 6 of Férussac in Quoy & Gaimard (1825); C, Helicteres turgidula Pease, 1870, lectotype MNHN IM-2000-30845, 13.7 mm; D, Helix turritella Férussac, 1821, possible syntype MNHN IM-2000-30846, 18.5 mm; E, Helix ventulus Férussac, 1825, lectotype MNHN IM-2000-30848, 12.9 mm. Ellobiidae: F, Auricula sandwichiensis Souleyet, 1852, lectotype MNHN IM-2000-30849, 11.5 mm, figs 31 & 32 of Souleyet (1852). Endodontidae: G, Endodonta henshawi Ancey, 1904, syntype MNHN IM-2000-9654, 2.1 mm (shell width), fig. 15 of Ancey (1904b). Lymnaeidae: H, Lymnaea oahouensis Souleyet, 1852, lectotype MNHN IM-2000-30850, 11.7 mm, figs 39 & 41 of Souleyet (1852). Punctidae: I, Endodonta horneri Ancey, 1904, syntype MNHN IM-2000-9655, 1.0 mm (shell width), fig. 11 of Ancey (1904b). Scale bars: A-F, H, 5 mm; G, I, 1 mm. Dimensions given are shell height unless otherwise stated; reproductions of original illustrations not to scale.