Water mites from West Africa (Acari: Hydrachnidia) Author Smit, Harry text Acarologia 2021 2021-09-27 61 3 700 746 https://www1.montpellier.inrae.fr/CBGP/acarologia/article.php?id=4466 journal article 10.24349/5d6U-DX5N 2107-7207 7159546 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. Figure 20 Neumania ( Neumania ) liberiensis Cook , dorsum male. Scale bar = 100 µm. Distribution. Cameroon ( Viets 1916 ), South Africa (K.O. Viets 1962 ), Ruanda ( Bader 1968 ), Burundi ( Bader 1968 ), the Gambia , Ghana (this study).