Charopa miranda Hutton, 1883

Brook, Fred J., Kennedy, Martyn, King, Tania M., Ridden, Johnathon, Shaw, Matthew D. & Spencer, Hamish G., 2020, Catalogue of New Zealand land, freshwater and estuarine molluscan taxa named by Frederick Wollaston Hutton between 1879 and 1904, Zootaxa 4865 (1), pp. 1-73 : 30-32

Charopa miranda Hutton, 1883

Pl. 3, fig. F

Hutton, 1883. New Zealand Journal of Science, 1: 476.

Type material. Lectotype (designated by Marshall & Barker 2008: 145), CMNZ M12780 [ex M239], and paralectotypes, CMNZ M239 (1), CMNZ M12785 [ex M239] (4) (dry shells). Paralectotypes in CMNZ M12785 are Granallodiscus mayhillae Marshall & Barker, 2008 , according to Marshall & Barker (2008: 145). The molluscan collection at CMNZ has radula fragments mounted on a glass slide with the label details ‘ Psyra miranda, Greymouth, XVI p. 180’, in Hutton’s handwriting (i.e., CMNZ 2017.17.70), which is probably primary type material (see descriptions of radula and jaw by Hutton 1884b: 181).

Label details. CMNZ M239—‘59. Psyra miranda Hutton , Greymouth’, pillbox label in Hutton’s handwriting.

Type locality. ‘Greymouth (R. Helms)’ ( Hutton 1883g: 476, 1884b: 181).

Previous illustrations of type material. Jaw and radula teeth illustrated by Hutton (1884b: pl. 9, fig. W, pl. 11, fig. S) probably from type material; Pilsbry (1892 [in 1892–1893]: 68, 303, pl. 22, figs. 40–42—‘drawn from Prof. Hutton’s type’, ‘H. Suter, del.’); Suter (1915: pl. 9, figs. 3, a, b—possibly type material).

Remarks. Hutton submitted a description of this species to the Transactions and Proceedings of the New Zealand Institute issue for 1883, but publication was delayed until May 1884 ( Hutton 1884b: 180), and was preempted by a brief description in an account of a meeting of the Philosophical Institute of Canterbury ( Hutton 1883g: 476). There has been confusion over the identity and distribution of Charopa miranda Hutton, 1883 , as indicated in synonymies by Marshall & Barker (2008). In order to stabilize the nomenclature the last-mentioned authors designated a lectotype of miranda (CMNZ M12780), illustrated here in pl. 3 fig. F, which they also designated as a neotype of Helix granum Pfeiffer, 1857 , thus making Charopa miranda Hutton, 1883 a junior synonym of the latter taxon. According to Marshall & Barker (2008: 146, fig. 33B), this species has a wide distribution in the southeastern North Island and northern South Island.

Current taxonomy. An objective junior synonym of Granallodiscus granum (Pfeiffer, 1857) — Marshall & Barker (2008: 145).