The water mite family Mideopsidae (Acari: Hydrachnidia): a contribution to the diversity in the Afrotropical region and taxonomic changes above species level Author Pešić, Vladimir Author Cook, David Author Gerecke, Reinhard Author Smit, Harry text Zootaxa 2013 3720 1 1 75 journal article 10.11646/zootaxa.3720.1.1 5538d5c3-31c3-4ad6-89bc-8c9dc9eaaf1a 1175-5326 285029 E4F362CE-0F00-4C1D-9DF6-139F824815C9 Xystonotus madagascariensis Pešić, Cook & Gerecke sp. nov. ( Figs. 41G–H , 44A–F ) Type series : Holotype female, dissected and slide mounted, Madagascar 109, Ankaratra (Antananarivo), Reserve Manjakatompo, riparian spring exp. SE, at spring stream N deviation to Analamitana (MD108), 1850 m asl., 14.3˚C, 0.003 mS/cm, 08.x.2001 , Gerecke & Goldschmidt. Paratype : same locality and data as holotype , 0/1/0 (dissected and slide mounted). FIGURE 41A–H. Photographs of dorsal shield. A–C. Djeboa multidentata K. Viets, 1911 : A —male holotype (SMF 43185); B–C —male (SMF 43203). D–E. Mideopsellides geae K.O. Viets, 1962 : D —male holotype; E— female paratype; F. Phreatomideopsis arrenuripalpis Schwoerbel, 1986 : lectotype female. G–H. Xystonotus madagascariensis sp. nov. , female: G = holotype; H = paratype. FIGURE 42A–F. Mideopsellides geae K.O. Viets, 1962 (A–B, D–F = male, C = female): A = dorsal shield; B–C = idiosoma, ventral view; D = palp; E = I-L; F = IV-L. FIGURE 43A–I. Phreatomideopsis arrenuripalpis Schwoerbel, 1986 , female: A = dorsal shield; B = genital plate; C = idiosoma, ventral view; D = palp (P-1 missing); E = P-4 and -5; F = palp; G = I-L-3-6; H = III-L-4-6; I = IV-L-4-6. FIGURE 44A–F. Xystonotus madagascariensis sp. nov. , female: A = dorsal shield; B = idiosoma, ventral view; C = palp; D = palp, chelicera and gnathosoma; E = genital field; F = I-L; G = IV-L. FIGURE 45A–D. Photographs of selected sampling localities. A. Madagascar, Joffreville (M.d’Ambre, Antsiranana), Maison Rousettes, river with small cascade and pool. Home of Djeboa amethystica sp. nov. ; B. Madagascar, Ionilahy (Fianarantsoa), lake Ranovory. Home of Djeboa amendano sp. nov. ; C. Ghana, Kyabobo NP, Kue River. Locus typicus of Djeboa wondergemi sp. nov. ; D. Ghana, Ankasa NP, Ankasa River. Locus typicus of Djeboa ghanaensis sp. nov. and home of Djeboa ferruginea K. Viets, 1914 and D. unimaculata (Cook. 1966) . Photos. A–B Gerecke, C–D Smit. Diagnosis (based on female; male unknown). Dorsal shield with V-shaped area of smaller pores only slightly raised laterally, reaching frontal and caudal margin of dorsal shield, more distanced to each other in their middle part, leaving a broader medial, and narrower lateral areas ( Figs. 41 G-H); gnathosomal bay a rounded V-shaped; medial margin of Cx-IV reduced to a median angle; genital bay of moderate depth, embracing approximately onehalf of the genital field ( Fig. 44E ); genital field noticeably wider than long (L/W ratio 0.9); Cxgl-2 located anterior to gonopore; ventral tubercle of P-4 truncate. Description Female ( holotype , in parentheses measurements of paratype ): Idiosoma (ventral view: Fig. 44B ) L/W 434 (475)/378 (394). Dorsal shield ( Fig. 41 G-H) L/W 398 (428)/341 (347), ratio 1.17 (1.23); gnathosomal bay L 65 (65); gonopore L/W 83 (86)/94 (92), ratio 0.9 (0.9); egg maximum diameter (127). Palp ( Fig. 44C ): total L 165-167 (163); L/H, L/H ratio: P-1, 20/25, 0.8 (20/25, 0.8); P-2, 39/40, 0.98 (37/40, 0.93); P-3, 35/31, 1.12 (32/32, 1.0); P- 4, 52-53/28-29, 1.9 (55/28, 2.0); P-5, 19-20/10, 2.0 (19/9, 2.1); chelicera total L 92 (89); gnathosoma vL 82 (80). Legs: dL of I-L: 60 (59), 59 (59), 45 (48), 50 (51), 63 (65), 77 (74); I-L-6 H 36 (33), I-L-6 dL/H ratio 2.1 (2.2); dL of IV-L: 69 (72), 60 (71), 59)63), 79 (83), 99 (103), 92 (105). Male : Unknown. Etymology : Named after the country of the type locality. Discussion : Due to the shape of the posteromedial suture lines of Cx-IV which extend abruptly posteriorly and closely flank the genital field, the new species is assigned to the subgenus Mixomideopsis which also includes Xystonotus ( Mixomideopsis ) sandola (Cook) from South Africa . The later species is unique within the genus Xystonotus in that the legs bear a few swimming setae (numbers: III-L-3/4 and IV-L-4, 1, III/IV-L-5, 2), Cxgl-2 being located close to anterolateral margin of genital field, and P-4 very slender with a proximally placed ventral tubercle. Distribution : Madagascar ; only known from the type locality in the Ankaratra mountains.