Helicteres laevis, 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 : 257

laevis Pease, 1870 , Helicteres

( Fig. 4A )

[ Helicteres ] (Leptachatina) laevis [sic] Pease, 1870: 91.

Achatinella (Leptachatina) laevis [sic] – Crosse 1876: 97, pl. 4, fig. 6.

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

TYPE MATERIAL. — Lectotype (here designated) MNHN IM-2000- 30828.

TYPE LOCALITY. — “l’île de Kauai (îles Hawaii)” (from 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 not explicitly based on only a single specimen but neither does it imply the existence of syntypes. The species was illustrated by Crosse (1876: 97, pl. 4, fig. 6), who indicated that there were two “individus typiques” in the collection of the Journal de Conchyliologie. Fischer-Piette (1950: 149) noted the specimen illustrated by Crosse and listed a measured “ Holotype ” (not explicitly the specimen illustrated by Crosse). Johnson (1994: 16) simply referenced Fischer-Piette’s statement, while also noting additional “ paratypes ” (MCZ 45173). Neither of these listings constitutes a lectotype designation (see introductory text regarding lectotypes). Despite Crosse’s statement that there were two specimens in the collection, there is now only one specimen in the MNHN lot. 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 indicate that the specimen is that illustrated by Crosse (1876: pl. 4, fig. 6), one indicating that it was received from Pease in 1869. Although the figures are not detailed, and the shell is rather featureless, the shell in MNHN IM-2000-30828 is here designated as the lectotype.

Figures

FIG. 4.— Amastridae:A, Helicteres laevis Pease,1870,lectotype MNHN IM-2000-30828, 9.2 mm;B, Helix luteola Férussac,1825,holotype MNHN IM-2000-30829, 17.0 mm; C, Helicter pachystoma Pease, 1869,lectotype MNHN IM-2000-30830, 13.0 mm; D, Helicteres rugulosa Pease,1870,lectotype MNHN IM-2000-30831, 12.8 mm; E, Helicter simplex Pease, 1869, lectotype MNHN IM-2000-30834, 7.3 mm; F, Helicter solida Pease, 1869, syntype MNHN IM-2000-30836, 14.0 mm; G, Helicteres sphaerica Pease, 1870, lectotype MNHN IM-2000-30837, 10.1 mm; H, Helix spirizona Férussac, 1825, lectotype MNHN IM-2000-30839, 22.3 mm; I, Helicteres tenebrosa Pease, 1870, lectotype MNHN IM-2000-30841, 12.7 mm. Scale bars: 5 mm. Dimensions given are shell height.