Djeboa vanilla Cook, Pešić & Gerecke,

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: 58-62

publication ID

http://dx.doi.org/10.11646/zootaxa.3720.1.1

publication LSID

lsid:zoobank.org:pub:E4F362CE-0F00-4C1D-9DF6-139F824815C9

persistent identifier

http://treatment.plazi.org/id/03F82941-AD74-FFCB-44EE-FA92EDEFDEA0

treatment provided by

Plazi

scientific name

Djeboa vanilla Cook, Pešić & Gerecke
status

sp. nov.

Djeboa vanilla Cook, Pešić & Gerecke  sp. nov.

( Figs. 35 A –FView FIGURE 35 A – F, 40 G –HView FIGURE 40 A – L)

Type series: Holotype male, dissected and slide mounted, Madagascar 151, Sambava (Ansiranana), stream in Vanilla  plantation, ca. 1 km W from the town, 10 m asl., 28.3 ˚C, 0.011 mS/cm, 13.xi. 2001, Gerecke & Goldschmidt. Paratypes: same data as holotype, 0/ 1 /0 (dissected and slide mounted); Madagascar 078ab 1, Fort Dauphin (Tulear), Mandena  (QMM area), River Amendano  , 0.5 km upstream road bridge, 12 m asl., pool, 15.ix. 2001, Gerecke & Goldschmidt, 0/ 1 /0 (dissected and slide mounted).

Diagnosis: Idiosoma anteriorly truncated; dorsal shield elliptical (L/W ratio 1.2), with little pronounced medial depression, lateral ridges slightly elevated, size of pores gradually diminuishing medially ( Fig. 35 AView FIGURE 35 A – F); muscle scars with well pronounced thickenings ( Figs. 40 G –HView FIGURE 40 A – L); edges of ventral shield serrate; gnathosomal bay Y-shaped; tips of Cx-I ending posterior to frontal margin; Cx-III and -IV with a few longitudinal striae (two or three pairs on Cx- IV). Palp ( Fig. 35 DView FIGURE 35 A – F): P- 1 with a dorsal seta; P- 2 with straight ventral and convex dorsal margin; P- 3 proximally with an inflation, from here to distal edge straight, maximum height proximally; P- 4 ventral margin concave, continuously narrowing from base to distal edge. Legs: I-L ( Fig. 35 EView FIGURE 35 A – F) with I-L- 5 stout, ventral margin forming an obtuse angle in proximal third; I-L- 6 L/H ratio 2.2-2.3, distally convexly protruding; IV-L: Fig. 35 FView FIGURE 35 A – F; swimming setae numbers: III-L-4, 5; III-L-5, 6; IV-L-4, 4; IV-L-5, 6.

Description:

Male (holotype): Idiosoma (ventral view: Fig. 35 BView FIGURE 35 A – F) L/W 464 / 453. Dorsal shield ( Fig. 40 GView FIGURE 40 A – L) L/W 397 / 330, ratio 1.2; gnathosomal bay L 85. Gonopore L/W 60 / 16. Palp: L/H, L/H ratio: P-2, 41/ 35, 1.19; P-3, 34/ 23, 1.5; P-4, 45/ 17, 2.7; P-5, 13/ 7, 1.9; chelicera total L 90; gnathosoma vL 91. Legs: dL of I-L: 41, 43, 45, 51, 59, 83; I-L- 6 H 35, L/H ratio 2.4; dL of IV-L: 68, 72, 63, 83, 105, 106.

Female (paratype Madagascar 151, in parentheses Madagascar 078ab 1): Idiosoma (ventral view: Fig. 35 CView FIGURE 35 A – F) L/ W 475 (472)/ 439 (456). Dorsal shield ( Figs. 35 AView FIGURE 35 A – F, 40 HView FIGURE 40 A – L) L/W 403 (421)/ 347 (350), ratio 1.16 (1.2); gnathosomal bay L 85 (88). Gonopore L/W 91 (89)/ 80 (74), ratio 1.14 (1.2); egg maximum diameter 106 (104). Palp: total L 155-157 (165); L/H, L/H ratio: P-1, 20/ 22, 0.93 (20 / 21, 0.95); P-2, 43- 45 / 34-37, 1.22-1.27 (45 / 35, 1.27); P-3, 34/ 26, 1.3 (36 / 26, 1.36); P-4, 46/ 18, 2.6 (49 / 18, 2.8); P-5, 12/ 7, 1.7 (15 / 8, 2.0); chelicera total L (99); gnathosoma vL 89 (99). Legs: dL of I-L: 39 (40), 42 (42), 43 (45), 46 (47), 55 (60), 79 (86); I-L- 6 H 34 (37), L/H ratio 2.3 (2.3); dL of IV-L: 54 (68), 70 (75), 72 (65), 85 (89), 103 (102), 106 (108).

Etymology: Named after the vanilla  plantation where two of the type specimens were collected.

Discussion: A similar dorsal shield, with pores gradually decreasing in size medially, is found in D. maromandia  sp. nov. The latter differs in the presence of a pointed projection on the ventral gnathosoma margin, less pronounced muscle scars and tips of Cx-I extending beyond frontal margin.

Distribution: Madagascar; eastern rain forest, streams in the northern and southern parts.