Djeboa mandena 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 : 45-49

publication ID

https://doi.org/ 10.11646/zootaxa.3720.1.1

publication LSID

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

DOI

https://doi.org/10.5281/zenodo.6149195

persistent identifier

https://treatment.plazi.org/id/03F82941-AD61-FFC6-44EE-FADAEC10DD6C

treatment provided by

Plazi

scientific name

Djeboa mandena Pešić, Cook & Gerecke
status

sp. nov.

Djeboa mandena Pešić, Cook & Gerecke sp. nov.

( Figs. 26A–E View FIGURE 26 A – E , 27A–C View FIGURE 27 A – C , 37K–L View FIGURE 37 A – L )

Type series: Holotype male, dissected and slide mounted, Madagascar 078a2d, Fort Dauphin (Tulear), Mandena (QMM area), River Amendano , 0.5 km upstream road bridge, 15.ix.2001, 12 m asl., riffle upstream, Gerecke & Goldschmidt. Paratypes: 2/1/0, same data as holotype, dissected and slide mounted.

Diagnosis: Dorsal shield oval (L/W ratio 1.1–1.2), with medial depression; muscle scars with strongly pronounced thickenings ( Figs. 37K–L View FIGURE 37 A – L ), located at nearly equal distance anterior and posterior to the postocularia; gnathosomal bay V-shaped; tips of Cx-I slightly extending beyond frontal margin; medial margin of Cx-IV reduced to a median angle, posterior margin extending laterally. Palp ( Figs. 26D–E View FIGURE 26 A – E ): P-1 with a dorsal seta; P-2 inflated with straight ventral and strongly convexly bowed dorsal margin; P-3 much higher proximally than ventrally, dorsal margin strongly convex; P-4 slender, basally thickened, from here to anterior tip equally narrowed. Legs: I- L ( Fig. 27A View FIGURE 27 A – C ) and IV-L ( Fig. 27B View FIGURE 27 A – C ) with rather stout terminal segments; L/H ratio I-L-6, 1.8-2.0; II-L-6, 2.0-2.1; III- L-6, 1.8-2.1; IV-L-6, 1.9-2.2; swimming setae numbers: III-L-4, 5-6; III-L-5, 8; IV-L-4, 4; IV-L-5, 7-8.

Description:

Male (holotype, in parentheses paratype): Idiosoma (ventral view: Fig. 26B View FIGURE 26 A – E ) L/W 378 (381)/370 (366). Dorsal shield ( Figs. 26A View FIGURE 26 A – E , 37K View FIGURE 37 A – L ) L/W 329 (325)/297 (295), ratio 1.1 (1.1); gnathosomal bay L 69 (69). Gonopore L/W 62 (65)/14 (13); ejaculatory complex L (117). Palp: total L 142-148 (141); L/H, L/H ratio: P-1, 15-17/20-22, 0.8 (15/ 20, 0.8); P-2, 36-37/37-39, 0.96-0.99 (38/39, 0.99); P-3, 36-37/29, 1.2 (35/29, 1.2); P-4, 45-46/15, 3.0-3.1 (43/15, 3.0); P-5, 10-11/6, 1.6-1.8 (10/5, 1.9); chelicera total L 78 (78); gnathosoma vL 74 (72). Legs: dL of I-L: 37 (37), 45 (41), 35 (35), 39 (39), 52 (54), 62 (61); I-L-6 H 32 (32), I-L-6 L/H ratio 1.9-2.0 (1.9); II-L-6 L/H 69 (72)/33 (35), ratio 2.1 (2.0); III-L-6 L/H 63 (65)/34 (31), ratio 1.8 (2.1); dL of IV-L: 51 (63), 48 (63), 42 (53), 52 (57), 71 (75), 72 (75); IV-L-6 H 34-37 (35-40).

Female (paratype): Idiosoma (ventral view: Fig. 26C View FIGURE 26 A – E ) L/W 397/378. Dorsal shield ( Fig. 37L View FIGURE 37 A – L ) L/W 336/300, ratio 1.1; gnathosomal bay L 70. Gonopore L/W 85/75, ratio 1.13. Palp: total L 149; L/H, L/H ratio: P-1, 16/21, 0.8; P-2, 39/40, 0.98; P-3, 38/30, 1.3; P-4, 45/15, 3.0; P-5, 11/7, 1.6; chelicera total L 79; gnathosoma vL 75. Legs: dL of I-L: 39, 37, 35, 38, 54, 59; I-L-6 H 32, I-L-6 dL/H ratio 1.8; II-L-6 dL/H 65/32, ratio 2.0; III-L-6 dL/H 66/35, ratio 1.9; dL of IV-L: 66, 63, 54, 57, 71, 74; IV-L-6 H 37.

Etymology: Named after the unique coastal forest area North of Fort Dauphin.

Discussion: Djeboa mandena sp. nov. is closely related to D. angulipalpis sp. nov (see there for common distinctive characters). The latter species differs in more slender distal segments of legs, especially of III/IV-L (dL/ H ratio III-L-6 3.0-3.3, IV-L-6 3.2-3.6; compare Figs. 6 View FIGURE 6 A – B A-B with 27A–C) and dorsal margin of P-2 forming an acute angle in the proximal part of the segment (compare Figs. 5D–E View FIGURE 5 A – E with 26D–E).

Distribution: Madagascar; known only from the type locality in a coastal forest north of Fort Dauphin.

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Trombidiformes

Family

Mideopsidae

Genus

Djeboa

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