Leptopoma pannosa Hutton, 1882

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 : 13-14

Leptopoma pannosa Hutton, 1882

Pl. 1, fig. E

Hutton, 1882. New Zealand Journal of Science, 1: 282.

Type material. Lectotype, CMNZ M1266.1 [ex ZS 179], paralectotypes (2), CMNZ 1266.2 [= M18077, Cytora chiltoni (Suter, 1896) ], CMNZ M1266.3 [= M18078, Cytora mayhillae Marshall & Barker, 2007 ] (dry shells). Lectotype designation and identification of paralectotypes by Marshall & Barker (2007: 94). According to a note in the CMNZ accession register (by D. Gregg, 8 May 1968) the type lot M1266 originally contained four specimens. The molluscan collection at CMNZ has a radula mounted on a glass slide with the label details ‘ Leptopoma pannosa, Greymouth, XVI p. 173’, in Hutton’s handwriting (i.e., CMNZ 2017.17.46), which is also probably primary type material (see description of radula by Hutton 1883d: 140), but whether it is from the lectotype, or a paralectotype, is not known. There is a dab of glue residue on this glass slide, suggesting that some other item, possibly the operculum illustrated by Hutton 1884b: pl. 10, fig. U), was formerly attached to it, but is now lost.

CMNZ molluscan catalogue details. M1266—‘Lagochilus pannosum Hutton, Greymouth (old no. ZS 179)’.

Type locality. ‘Greymouth (R. Helms)’ ( Hutton 1882p: 282); ‘Greymouth, under very damp logs and earth (Mr. R. Helms)’ ( Hutton 1883d: 140).

Previous illustrations of type material. Operculum and radula teeth illustrated by Hutton (1884b: pl. 10, fig. U) probably from type material.

Remarks. Hutton submitted a description of Leptosoma pannosa to the Transactions and Proceedings of the New Zealand Institute issue for 1882, but publication was delayed until May 1883 ( Hutton 1883d: 140), and was pre-empted by a brief description in an account of a meeting of the Philosophical Institute of Canterbury ( Hutton 1882p: 282).A description by Hutton (1884b: 173) of the radula of pannosa was probably based on the putative type material in CMNZ 2017.17.46 mentioned above. Marshall & Barker (2007: 94) noted that the type series at CMNZ contained three different species. They selected a lectotype, illustrated here for the first time in pl. 1, fig. E, that most closely matched New Zealand malacologists’ interpretations of pannosa (i.e., broadly conical shell of moderate size with enlarged periostracal projections at the periphery), and re-described the species.

Current taxonomy. Cytora pannosa (Hutton, 1882) — Powell (1957: 91), Powell (1979: 84), Marshall (1995: 497), Marshall & Barker (2007: 94), Spencer et al. (2009: 203).

Distribution. New Zealand; northwestern South Island, from Heaphy River to the vicinity of Haast (Marshall & Baker 2007: 97, fig. 17B; AIM and NMNZ collection records).