Neumania (Neumania) marginata K. Viets, 1916

Smit, Harry, 2021, Water mites from West Africa (Acari: Hydrachnidia), Acarologia 61 (3), pp. 700-746 : 730-731

Neumania (Neumania) marginata K. Viets, 1916

New records. The Gambia. 0/5/0, pool Prufu Swamp, Basse, Upper River Division, 10

Feb. 1998; 0/1/0, pond ± 5 km W of Basse, along road Basse-Bansang, Upper River Division,

12 Feb. 1998. Ghana. 0/1[young]/0, shallow roadside pond, along road Axim-Elubo, 5°09.080′ N 2°37.354′ W, 46 m a.s.l., 27 Feb. 2011 ; 0/1/0, fish pond along road Elubo-Axim, E of entrance Ankasa NP, 5°09.637′ N 2°38.682′ W, 36 m a.s.l., 27 Feb. 2011 ; 0/7/2, First pond, Ankasa

NP, 5°17.415′ N 2°38.384′ W, alt. 89 m a.s.l., 14 Feb. 2013 ; 0/3/0, Avu Lagoon, 5°59.244′ N

0°42.476′ E, 13 m a.s.l., 18 Feb. 2013 ; 0/2/0, Inlet Volta River at Kpong, 6°09.183′ N 0°03.709′

E, 25 m a.s.l., 27 Feb. 2013.

Remarks. Walter (1935) reported this species from Niger and Burkina Faso. His illustration of the female shows a narrow strip of secondary sclerotization along Cx-IV. However, N. marginata has very broad and distinct secondary sclerotization along Cx-IV, almost completely filling the medial space between Cx-IV. In my opinion the specimens of Walter (1935) must be assigned to N. separata Cook, 1966 . The female of this species has a genital field which is very similar to that of N. marginata , but lacks the broad secondary sclerotization. Walter & Bader (1952) reported N. marginata from Kenya, but they illustrated the deutonymph only. Therefore, it is not clear to which species their material belongs.

Distribution. Cameroon ( Viets 1916), South Africa (K.O. Viets 1962), Ruanda ( Bader 1968), Burundi ( Bader 1968), the Gambia, Ghana (this study).