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 ( Allolemienia ) falcifera Cook, 1974 ( Figure 17 A-C) New records. The Gambia . 0/1[mounted]/0, pool Prufu Swamp, Upper River Division , 10 Feb. 1998; 1/0/0, pool along Prufu Bolon stream, Basse, Upper River Division , 12 Feb. 1998 . Ghana . 16/18/0, Lake Dahwenya, 5°46.760′ N 0°03.049′ E , 24 m a.s.l., 9 Feb. 2013 . Description. Female: Integument smooth, idiosoma dorsally 884-1226 long and 648-995 wide, ventrally 810-1045 long. Apodemes of anterior coxae reaching to anterior part of Cx-IV. Posterior margin of Cx-IV with relatively long apodemes ( Figure 17A ), lateral extensions rounded. Venter without secondary sclerotization. Gonopore 267 long. Genital plates rounded, 130 long, somewhat longer than wide, each plate with 27-29 acetabula. Between Cxgl-4 and genital field four pairs of setae lying free in the integument. Length of P1–5: 42, 124, 72, 148, 46. P4 with a large ventral setal tubercle, more medially two more smaller setal tubercles present ( Figure 17B ). Length of I-leg-4–6: 243, 356, 352; grooved setae very long. Length of IV-leg-4–6: 356, 360, 324. Claws of legs relatively large, e.g., claw of IV-leg-6 50 long ( Figure 17C ). IV-leg-5 with one trifurcate seta, other trifurcate setae lost. Swimming setae lost, but probably IV-leg-5 and IV-leg-4 with four swimming setae. Remarks. The male specimen from the Gambia differs somewhat from the holotype and only known specimen thus far. The large claw of II-leg-6 is 86-94 long ( 121 in the holotype ), Figure 17 Neumania ( Allolemienia ) falcifera Cook , female. A – venter; B – palp; C – IV-leg-6. Scale bars: A = 200 µm, B-C = 50 µm. and IV-leg-3 and IV-leg-4 have only one trifurcate ventral seta (versus IV-leg-3 with two or three and IV-leg-4 with three in the holotype ). As nothing is known about the variation in these characters, I assign the specimen from West Africa for the time being falcifera to. The female has not been described previously. Distribution. Uganda ( Cook 1974 ), the Gambia , Ghana (this study).