Thapsia insulsa Preston, 1910

Rowson, B, Warren, B. H. & Ngereza, C. F., 2010, Terrestrial molluscs of Pemba Island, Zanzibar, Tanzania, and its status as an " oceanic " island, ZooKeys 70, pp. 1-39 : 15

13. Thapsia insulsa Preston, 1910 Figs 39-41

Thapsia insulsa Preston 1910: 531; pl. VIII, fig. 14

Notes.

The small size, tight coiling, and large umbilicus of this species are distinctive even within this difficult genus ( Preston 1910). Verdcourt (2006) records Trichotoxon insulsa from the Shimba Hills (the type locality) and Mrima Hill, and NMW has specimens from Gazi (all localities in coastal Kenya). We found only in non-forest sites (Table 2).