Torrenticolid water mites (Acari: Hydrachnidia: Torrenticolidae) from Ghana Author Pešić, Vladimir Author Smit, Harry text Zootaxa 2014 3820 1 1 80 journal article 36832 10.11646/zootaxa.3820.1.1 e3d7d016-1d73-438f-95e4-1b028b2b9627 1175-5326 286303 BBE4177B-5A2C-4911-987C-454BB8FA767C Torrenticola bomiensis Cook, 1966 ( Figs. 3A–D , 4A–B , 12C–D , 14C–D ) Torrenticola bomiensis Cook 1966 : 65 . New records . Ghana : Tagbo River, downstream of falls, 7º 00.708 N , 0º 34.326 E , alt. 394 m asl., 23.ii.2013 , Smit, 0/1/0 (mounted); Supon stream near Asiakwa, Atewa Hills, 6º 15.530 N , 0º 30.642 W , 7.iii.2011 , Smit, 2[one juvenile]/1/0 (1/0/0 mounted). FIGURE 1A–D. Torrenticola anomallela Cook, 1966 , female, Apkonu stream: A = dorsal shield; B = idiosoma, ventral view; C = palp, medial view; D = gnathosoma. Scale bars = 100 Μm. FIGURE 2A–C. Torrenticola anomallela Cook, 1966 , male, Akaa Falls: A = idiosoma, ventral view; B = palp, medial view; C = ejaculatory complex. Scale bars = 100 Μm. Morphology. General features —Idiosoma roundish; Cxgl–4 subapical, only slightly posterior of Cx-I tips (not described in the original description); suture of Cx-IV extending beyond posterior margin of genital field; excretory pore and Vgl–2 slightly posterior the line of primary sclerotization, excretory pore slightly posterior to Vgl–2 ( Fig. 3B ); ventral margin of gnathosoma rather straight, rostrum not clearly set off from gnathosomal base ( Fig. 3D ); P-2 ventral margin straight, distally with a subrectangular, anteriorly directed and apically serrated projection and a very short, denticle-like seta laterally at base of projection; P-3 with a subrectangular, laterally directed and apically serrated ventrodistal projection and a long seta laterally at base of projection; P-4 stocky, with well developed ventral protuberance bearing one long and 1–3 short setae ( Figs. 3C , 4B ). Male: genital field subrectangular in shape; ejaculatory complex normal in shape. Female: genital field pentagonal in shape. Measurements. Male (from Supon stream, n = 1)—Idiosoma (ventral view: Figs. 4A , 14C ) L 563, W 403; dorsal shield ( Fig. 12C ) L 458, W 334, L/W ratio 1.37; dorsal plate L 424; shoulder platelets L 130–134, W 48, L/ W ratio 2.7–2.8; frontal platelets L 122–125, W 50–52, L/W ratio 2.42–2.44; shoulder/frontal platelets L ratio 1.04–1.1. Gnathosomal bay L 87–88, Cx-I total L 219, Cx-I mL 131, Cx-II+III mL 94; ratio Cx-I L/Cx-II+III mL 2.3; Cx-I mL/Cx-II+III mL 1.4. Genital field L/W 122/100, ratio 1.22; ejaculatory complex L 174; distance genital field-excretory pore 91, genital field-caudal idiosoma margin 125. Gnathosoma vL 255; chelicera total L 289; palp total L, dL/H, dL/H ratio: P-1, 25/25, 1.0; P-2, 75/40, 1.88; P-3, 58/37, 1.56; P-4, 75/23, 3.2; P-5, 16/12, 1.3; P-2/P- 4 ratio 1.01; dL of I-L-2–6: 48, 54, 69, 74, 72; I-L-6 H 29, dL/H I-L-6 ratio 2.5. FIGURE 3A–D. Torrenticola bomiensis Cook, 1966 , female, Tagbo River: A = dorsal shield; B = idiosoma, ventral view; C = palp, medial view; D = gnathosoma. Scale bars = 100 Μm. FIGURE 4A–B. Torrenticola bomiensis Cook, 1966 , male, Supon stream: A = idiosoma, ventral view; B = palp, medial view. Scale bars = 100 Μm. Female (from Tagbo River, n = 1)—Idiosoma (ventral view: Figs. 3B , 14B ) L 650, W 428; dorsal shield ( Figs. 3A , 12D ) L 516, W 373, L/W ratio 1.38; dorsal plate L 481; shoulder platelets L 147, W 50–52, L/W ratio 2.8–2.9; frontal platelets L 134, W 53–55, L/W ratio 2.4–2.5; shoulder/frontal platelets L ratio 1.1. Gnathosomal bay L 100, Cx-I total L 248, Cx-I mL 148, Cx-II+III mL 75; ratio Cx-I L/Cx-II+III mL 3.3; Cx-I mL/Cx-II+III mL 2.0. Genital field L/W 133/125, ratio 1.06; distance genital field-excretory pore 137, genital field-caudal idiosoma margin 194. Gnathosoma vL 291; chelicera total L 325; palp total L, dL/H, dL/H ratio: P-1, 29/28, 1.04; P-2, 88/48, 1.85; P-3, 65/44, 1.48; P-4, 82/25, 3.3; P-5, 19/12, 1.6; P-2/P-4 ratio 1.08; dL of I-L-2-6: 53, 60, 79, 85, 85; I-L-6 H 32, dL/H I-L-6 ratio 2.6. Remarks. The specimens from Ghana in their general morphology agree well with Torrenticola bomiensis Cook, 1966 , a species widely distributed and numerous in Liberia ( Cook 1966 ). Differences with the original description (in parentheses, from Cook 1966 ) are found in slightly larger dimensions, the suture of Cx-IV extending further beyond the posterior margin of the genital field and the excretory pore shifted slightly posterior to Vgl-2 (lying on the same level as Vgl-2). In the figure of the palp of T. bomiensis given by Cook (1966) the ventral seta on P-2 is missing completely. Furthermore, the subapical position of Cxgl-4 can be speculated only on the basis of Cook’s figure ( Cook 1966, Fig. 169 ) of the ventral shield and the presence of a seta, with a minute dot, lying on the outer edge of Cx-I. Thus, our attribution of T. bomiensis is still provisional, and additional material is necessary to clarify its taxonomy. Distribution. Liberia ( Cook 1966 ); Ghana (first record).