Helix heldiana Pfeiffer, 1853

Pfeiffer, 1853a. Monographia heliceorum viventium, 3: 60.

Type material: Original description based on one or more specimens in the Cuming collection; type material not found in NHMUK collections in 2018, and whereabouts unknown .

Type locality: ‘Nova Seelandia’ (Pfeiffer 1853a: 60).

Remarks: There are no published illustrations of the type material, which had been obtained by H. Cuming from the Australian-based naturalist Frederick Strange. Pfeiffer (1854a: 148) listed the shell dimensions as “Diam. 2, alt. 1 2 / 3 mill.” He evidently intended to publish the original description of this species in Proceedings of the Zoological Society, 1851 (see Pfeiffer 1853a: 60), but publication was delayed until 1854 (Pfeiffer 1854b: 148), and was pre-empted by Pfeiffer (1853a: 60). Martens (1873: 11) noted that Nanina erigone Gray, 1850 and Helix heldiana Pfeiffer, 1853 were very similar.

Current Taxonomy: Treated as a junior synonym of Nanina erigone Gray, 1850 by Hutton (1884b: 197), Hedley & Suter (1893: 648) and Suter (1894d: 276, 1913b: 750).