Gabbiella humerosa ( Martens, 1879 )

Schultheiss, Roland, Ndeo, Oscar Wembo, Malikwisha, Meni, Marek, Carina, Bössneck, Ulrich & Albrecht, Christian, 2011, Freshwater molluscs of the Eastern Congo: notes on taxonomy, biogeography and conservation, African Invertebrates 52 (2), pp. 265-284 : 270

Gabbiella humerosa ( Martens, 1879)

G. h. edwardi ( Mandahl-Barth, 1954)

Fig. 2E Bithynia stanleyi var. humerosa: Martens 1879: 104 . (Type locality: “aus dem Victoria Nianza (Ukerewe),

an dessen Südwestrand”) Gabbia (Parabithynia) humerosa edwardi: Mandahl-Barth 1954: 55 , figs 23c–d. (Type locality: “ Northern part of Lake Edward, immediately east of the border of the Congo, in shallow water”) Taxonomic remarks: Mandahl-Barth (1968) recognised four other subspecies (alberti, kivuensis, kyogae, and tanganyicensis), each one reported from the eponymous lake, as well as a fifth, G. h. humerosa , from L. Victoria. The subspecies from L. Edward is reported to be the largest of these taxa. Habitat description: We found this species in vast abundance in L. Edward (at depths of 3–5 m) as well as in the Semliki R. (at depths of 2–3 m). Collecting sites: 5, 6, 8, 10, 11, 12, 13. IUCN Red List Category: Least Concern ( Jørgensen 2008 a).