Djeboa amendano Pešić, Cook & Gerecke, 2013

Pešić, Vladimir, Cook, David, Gerecke, Reinhard & Smit, Harry, 2013, The water mite family Mideopsidae (Acari: Hydrachnidia): a contribution to the diversity in the Afrotropical region and taxonomic changes above species level, Zootaxa 3720 (1), pp. 1-75 : 11-13

Djeboa amendano Pešić, Cook & Gerecke sp. nov.

( Figs. 2A–F , 37A–B )

Type series: Holotype male, dissected and slide mounted, Madagascar 0 76, Fort Dauphin (Tulear), Mandena (QMM area), pond at right border of River Amendano , 10 m asl., 21.6 ˚C, 0.211 mS/cm 13.ix.2001, Gerecke & Goldschmidt. Paratypes: same data as holotype 0/1/0 (dissected and slide mounted); Madagascar 0 79, Fort Dauphin (Tulear), Mandena (QMM area), swamp with Sphagnum at left border of River Amendano (1 km downstream road bridge), 10 m asl., 21.4 ˚C, 0.290 mS/cm 13.ix.2001, Gerecke & Goldschmidt 1/1/0 (dissected and slide mounted); Madagascar 0 77, Fort Dauphin (Tulear), Mandena (QMM area), ditch at right border of River Amendano , 10 m asl., 23.4 ˚C, 0.158 mS/cm 13.ix.2001, Gerecke & Goldschmidt 1/2/0 (slide mounted); Madagascar 226, Ionilahy (Fianarantsoa), lake Ranovory below village, 211 m asl., 21°43'49.8'' S, 047°36'58.6'' E, 31.8 ˚C, 22.iv.2011, Gerecke 1/3/0 (1/1/0 slide mounted, 0/2/0 and one egg from the slide-mounted female in pure ethanol).

Diagnosis: Dorsal shield oval (L/W ratio 1.1), without a medial depression; muscle scars not pronounced, visible only as lightly whitish areas ( Fig. 37B ); colour of dorsal shield blue green, well visible on mounted specimens; gnathosomal bay Y-shaped; tips of Cx-I ending posterior to frontal margin; coxae with a series of longitudinal striae (three to four pairs on Cx-IV). Palp ( Fig. 2D ): P-1 with a dorsal seta; P-2 with straight ventral and convexly bowed dorsal margin; P-3 proximally with an inflation, distally straight, maximum height proximally; P-4 slender and curved, ventral margin concave. Legs: I-L ( Fig. 2E ) with I-L-6 L/H ratio 2.8–2.9, basally narrowed, distally thickened; IV-L: Fig. 2F ; swimming setae numbers: III-L-4, 4–6; III-L-5, 5–6; IV-L-4, 5–6; IV-L-5, 6–7.

Description:

Male (holotype): Idiosoma (ventral view: Fig. 2B ) L/W 534/530. Dorsal shield ( Fig. 37A ) L/W 447/406, ratio 1.1; gnathosomal bay L 98. Gonopore L/W 76/19. Palp: total L 190–196; L/H, L/H ratio: P-1, 22-23/24-26, 0/89- 0.92; P-2, 51-52/41-42, 1.23-1.25; P-3, 43-46/25-26, 1.65-1.82; P-4, 60/18, 3.3; P-5, 14-15/8, 1.8-1.95; chelicera total L 106; gnathosoma vL 112. Legs: dL of I-L: 47, 57, 68, 65, 80, 109; I-L-6 H 38, I-L-6 L/H ratio 2.9; dL of IV- L: 77, 90, 79, 115, 125, 134.

Female (from Madagascar 0 76, in parentheses from Madagascar 079): Idiosoma (ventral view: Fig. 2C ) L/W 578 (597)/ 610 (633). Dorsal shield ( Figs. 2A , 37B ) L/W 505 (538)/464 (472), ratio 1.1 (1.14); gnathosomal bay L 102 (102). Gonopore L/W 119 (115)/96 (98), ratio 1.24 (1.17); egg maximum diameter 137. Palp: total L 199–202 (204); L/H, L/H ratio: P-1, 23/25, 0.93 (23/27, 0.85); P-2, 54/43, 1.25 (56/46, 1.2); P-3, 46-48/29, 1.58–1.64 (48/ 29, 1.6); P-4, 62/21-22, 2.9-3.0 (62/19, 3.3); P-5, 14-15/8-9, 1.7-2.0 (15/8, 1.9); chelicera total L 115 (114); gnathosoma vL 106 (116). Legs: dL of I-L: 46 (52), 57 (68), 51 (62), 57 (60), 73 (77), 102 (96); I-L-6 H 36 (39), I- L-6 L/H ratio 2.8 (2.5); dL of IV-L: 78, 85 (95), 75 (82), 106 (112), 131 (131), 123 (139).

Etymology: Named after river where it was collected.

Discussion: Djeboa amendano sp. nov. is characterized by a dorsal shield without a medial depression, and muscle scars visible only as a lightly whitish areas. It is similar to Djeboa curtipalpis sp. nov. from Ghana (see the latter for further discussion).

Distribution: Madagascar.

Figures

FIGURE 2 A – F. Djeboa amendano sp. nov. (B = male, A, C – F = female): A = dorsal shield; B – C = idiosoma, ventral view; D = palp; E = I-L; F = IV-L.

FIGURE 37 A – L. Photographs of dorsal shield. A – B. Djeboa amendano sp. nov.: A — holotype male; B — paratype female. C. Djeboa curtipalpis sp. nov., holotype male. D. Djeboa depressa sp. nov., holotype male. E. Djeboa compressa K. Viets, 1914, female lectotype (SMF 43190). F. Djeboa expansipalpis (Cook, 1966), female, Tinbé, Côte d’Ivoire. G. Djeboa gledhilli. sp. nov., holotype male. H. Djeboa ghanaensis sp. nov., holotype male. I – J. Djeboa angulipalpis sp. nov.: I — holotype male; J — paratype female. K – L. Djeboa mandena sp. nov.: K— holotype male; L — paratype female.