Djeboa nzia 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 : 51

Djeboa nzia Pešić, Cook & Gerecke sp. nov.

( Figs. 29A–E , 30A–B , 38D–F )

Type series: Holotype female, dissected and slide mounted, Côte d’Ivoire, River N’zi near Ouokokro (O), drift day, 10.i.1978 Statzner. Paratypes (all coll. Statzner, if not mentioned otherwise, dissected and slide mounted): 0/1/ 0, same locality as holotype, drift day, 10.i.1978; 1/1/0, same locality as holotype, drift night, 09.viii.1977, in liquid; 0/1/0, same locality as holotype, drift night, 27.i.1977; 0/1/0, same locality as holotype, drift night, 11.v.1977; 0/1/0, Côte d’Ivoire, River N’zi near Tinbé (T) drift day, 17.viii.1977, in liquid; 0/1/0, ibid., drift day, 11.vii.1977; 0/1/0, ibid., drift night, 12.i.1977; 0/1/0, Côte d’Ivoire, River N’zi near Fetekro (F), drift day, 13.i.1977; 1/0/0, Côte d’Ivoire, River N’zi near Kolomikro (K), drift night, 26.i.1977.

Diagnosis: Dorsal shield oval (L/W ratio 1.1), with medial depression; muscle scars, with well pronounced thickenings, shifted to the edges of medial depression ( Figs. 38D–F ); gnathosomal bay V-shaped; tips of Cx-I ending posterior to frontal margin; medial margin of Cx-IV reduced to a median angle; Cx-III and -IV with a series of longitudinal striae (five pairs on Cx-IV). Palp ( Figs. 29C , 30B ): P-1 without a dorsal seta; P-2 with straight or slightly concave ventral and strongly convexly bowed dorsal margin; P-3 distally higher than proximally, ventral margin proximally with an inflation, from here to distal edge straight; P-4 ventral margin slightly concave. Legs: I- L ( Fig. 29D ), with I-L-6 stout, L/H ratio 2.3-2.4; IV-L: Fig. 29E ; swimming setae numbers: III-L-4, 5; III-L-5, 5-7; IV-L-4, 4-5; IV-L-5, 4-5.

Description:

Male (from River N’zi near Kolomikro): Idiosoma (ventral view: Fig. 30A ) L/W 417/387. Dorsal shield ( Fig. 38F ) L/W 356/318, ratio 1.1; gnathosomal bay L 66. Gonopore L/W 81/15. Palp: total L 139; L/H, L/H ratio: P-1, 17/22, 0.8; P-2, 39/32, 1.2; P-3, 34/21, 1.6; P-4, 36/15, 2.35; P-5, 13/6, 2.1; chelicera total L 79; gnathosoma vL 76.

Female (holotype, in parentheses measurements of paratypes from River N’zi near Tinbe): Idiosoma (ventral view: Fig. 29B ) L/W 456 (459)/405 (413). Dorsal shield ( Fig. 29A ) L/W 377 (389)/347 (350), ratio 1.1 (1.1); gnathosomal bay L 72 (66-71). Gonopore L/W 82 (80)/74 (72), ratio 1.1 (1.1); egg maximum diameter (117). Palp: total L 149 (149-160); L/H, L/H ratio: P-1, 18/22, 0.8 (18-19/21, 0.85-0.89); P-2, 42/37, 1.12 (42/35-37, 1.12- 1.17); P-3, 37/24, 1.6 (35-42/25-26, 1.4-1.6); P-4, 39/17, 2.36 (40-43/16-20, 2.15-2.5); P-5, 13/7, 1.9 (14/8, 1.8); chelicera total L 86 (88); gnathosoma vL 83. Legs: dL of I-L-2-6: (36-40), (36-37), (35-40), (51), (63-68); I-L-6 H (28-29), I-L-6 L/H ratio (2.3-2.4); dL of IV-L: 54 (65), 71 (59), 62 (60), 69 (71), 85 (83), 98 (91).

Etymology: Named after the river from which the type specimen was collected.

Discussion: Djeboa nzia sp. nov. shares with Djeboa crocodilorum sp. nov. from South Africa the V-shaped gnathosomal bay, P-1 lacking dorsal seta and P-3 distally higher than proximally. It differs in the morphology of the dorsal shield, with the central depression less extensive and the lateral ridges not extending to frontal and caudal margin (compare Figs. 38D–F with 38G); P-3 ventral margin distally straight and basally with a small hump; tips of Cx-I not extending beyond frontal margin, and Cx-III/IV with longitudinal striation.

Distribution: Côte d’Ivoire.

Figures

FIGURE 29 A – E. Djeboa nzia sp. nov. female: A = dorsal shield; B = idiosoma, ventral view; C = palp; D = I-L- 2 - 6; E = IV-L.

FIGURE 30 A – B. Djeboa nzia sp. nov. male: A = idiosoma, ventral view; B = palp.

FIGURE 38 A – L. Photographs of dorsal shield. A – B. Djeboa globulipalpis sp. nov.: A— holotype female; B—paratype male; C Djeboa wondergemi sp. nov., female holotype. D – F. Djeboa nzia sp. nov.: D – E— female paratype, Fetekro, Côte d’Ivoire; F — paratype male, Kolomikro, Côte d’Ivoire. G Djeboa crocodilorum sp. nov., holotype male. H – J. Djeboa amethystica sp. nov.: H — female from Madagascar 135 a. I— holotype male; J— paratype female. K – L. Djeboa turmalinica sp. nov.: Kfemale holotype; L— female paratype.