Terrestrial molluscs of Cabo Delgado and adjacent inland areas of north-eastern Mozambique Author Muratov, Igor V. text African Invertebrates 2010 2010-12-31 51 2 255 255 http://www.bioone.org/doi/abs/10.5733/afin.051.0203 journal article 10.5733/afin.051.0203 2305-2562 10268367 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.