Helix gunnii Pfeiffer, 1850

Pfeiffer, 1850. Zeitschrift für Malakozoologie, 6: 86.

Type material: This species was described from one or more specimens in the Cuming collection (Pfeiffer 1850: 86); type material not found in NHMUK collections in 2018, and whereabouts unknown .

Type locality: ‘wahrscheinlich ist sie aus Neuseeland, was leider nicht bestimmt angegeben ist’ (Pfeiffer 1850: 86) .

Previous illustrations of type material: The shell of ‘ H. greenwoodi ’ from the Cuming collection that was illustrated by Reeve (1852 [in 1851–1854]: pl. 81, fig. 434) and Tryon (1885 [after Reeve 1852]: pl. 24, fig. 74) may have been from the type series of gunnii Pfeiffer.

Remarks: Authorship attributed to Gray by Pfeiffer (1850: 86), but the latter was the first published description of this species (see Petit 2012: 92). The heft of Zeitschrift für Malakozoologie containing Pfeiffer’s description was issued in August 1850, according to a footnote on p. 96 of Volume 6, and hence was pre-empted by H. greenwoodi Gray, 1850 .

Current Taxonomy: A subjective junior synonym of Helix greenwoodii Gray, 1850, according to Pfeiffer (1853: 156), Martens (1873: 8), Hedley & Suter (1893: 630), Suter (1894d: 284), Möllendorff & Kobelt (1903 [in 1903–1905]: 26) and Suter (1913b: 774).