Helicteres balteata, 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

balteata Pease, 1870 , Helicteres

( Fig. 3B )

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

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

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

TYPE MATERIAL. — Lectotype (here designated) MNHN IM-2000- 30818.

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. Fischer-Piette (1950: 149) listed the specimen illustrated by Crosse as “Exemplaire figuré”, not treating it explicitly as a type. Johnson (1994: 26) simply referenced Fischer-Piette’s statement but credited him with having listed the “ Holotype ”, while also noting additional “ paratypes ” (MCZ 142986). Johnson’s treatment did not constitute a lectotype fixation (see introductory text regarding lectotypes). The single specimen is a reasonable match for that illustrated by Crosse (1876: pl. 4, fig. 4), although the white sutural bands in that illustration appear quite exaggerated; the labels associated with the specimen state that it is the specimen illustrated by Crosse and that it was received from Pease in 1869. It is therefore 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.