Opeas hannense ( Rang, 1831 )

Muratov, Igor V., 2010, Terrestrial molluscs of Cabo Delgado and adjacent inland areas of north-eastern Mozambique, African Invertebrates 51 (2), pp. 255-255 : 270

Opeas hannense ( Rang, 1831)

Fig. 28 Helix (Cochlicelle) hannensis: Rang 1831:41 , pl.3, fig.8 ( Cape Verde peninsula,WestAfrica;4–5 × 1.5–2 mm).

One of the most common and widespread (mostly through introduction) tropical species; found at one station inland. This is apparently the first record of this species from eastern Africa. The illustrated shell is almost the same in size and proportions as Opeas araeum Connolly, 1923: 652 , pl. 19, fig. 35 (type: 5.3× 1.8 mm from Kenya), which is possibly a synonym of hannense . Can be easily separated from the two other small subulinids in the area by the narrow but decisively open umbilicus.

Figures

Figs 26–29.Subulinidae:(26)Curvellanyasana,10.6×5.7mm,stn1;(27) Euonymatugelensis,7.2×2.6mm,subadult,stn1;(28) Opeashannense,5.4×1.8 mm,stn1;(29)Allopeas? cf.acmella, 4.0×1.2 mm,stn 7.