Helicteres costulosa, Pease, 1870

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 : 254-255

costulosa Pease, 1870 , Helicteres

( Fig. 3D )

[ Helicteres ] (Leptachatina) costulosa Pease, 1870: 90 .

Achatinella (Leptachatina) costulosa – Crosse 1876: 97, pl. 3, fig. 4.

CURRENT TAXONOMIC STATUS. — Leptachatininae, Leptachatina (Leptachatina) . Valid species.

TYPE MATERIAL. — Lectotype (here designated) MNHN IM-2000- 30821.

TYPE LOCALITY. — “l’île de Kauai (îles Hawaii)” (in article title).

REMARKS

Considered by Pease as a species of “ Hélictères ” (i.e. genus Helicteres , though the formal genus name was not used and it is therefore placed in square brackets above) in the subgenus Leptachatina (see introductory text regarding species of Pease). The original description was implicitly based on multiple specimens: “Coloration jaunâtre et devenant habituellement pourprée près de la suture”. Fischer-Piette (1950: 149) noted the illustration of Crosse and listed a “ Holotype ” (no doubt the specimen illustrated by Crosse, though this was not stated explicitly). Johnson (1994: 10) simply referenced Fischer-Piette’s statement, while also noting an additional “ paratype ” (MCZ 45191). Neither statement constitutes a lectotype designation (see introductory text regarding lectotypes). The single MNHN specimen matches Crosse’s illustration reasonably well, and a label of the collection of the Journal de Conchyliologie, associated with the specimen and written at the time of Fischer-Piette, says “ Holotype ”, and this and two other labels state that it is the figured specimen, one indicating that it was received from Pease in 1869. It is here designated as the lectotype.

Figures

FIG. 3. — Amastridae Pilsbry, 1910: A, Helicteres antiqua Pease, 1870, lectotype MNHN IM-2000-30817, not measured; B, Helicteres balteata Pease, 1870, lectotype MNHN IM-2000-30818, 11.8 mm; C, Helicter brevicula Pease, 1869, lectotype MNHN IM-2000-30819, 7.7 mm; D, Helicteres costulosa Pease, 1870, lectotype MNHN IM-2000-30821, 14.0 mm; E, Helicter cylindrata Pease, 1869, lectotype MNHN IM-2000-30822, 8.2 mm; F, Helicter erecta Pease, 1869, lectotype MNHN IM-2000-30824, 14.6 mm; G, Helix gravida Férussac,1825, lectotype MNHN IM-2000-30825, 22.5 mm, fig. 4 of Férussac in Quoy & Gaimard (1825); H, Achatinella helvina Baldwin, 1895, possible syntype MNHN IM-2000-30133, 15.8 mm, fig. 30 of Baldwin (1895). Scale bars: A-F, 1 mm; G, 10 mm; H, 5 mm. Dimensions given are shell height; reproductions of original illustrations not to scale.