Africasia vietnamitica
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Genus: Africasia
Name
Africasia vietnamitica Pešić, Vladimir, 2014 – Wikispecies link – Pensoft Profile
- Africasia vietnamitica Pešić, Vladimir, 2014, Zootaxa 3774: 376-376.
Materials Examined
Type series.Holotype female, dissected and slide mounted, Vietnam C 20, DV 0 9, Ha Giang, Dong Van, Sang Tung, Dragon Cave, small lake - siphon in right arm, 23 ° 12 ' 41.8 '' N, 105 ° 14 ' 12.9 '' E, 1047 m asl., 04.ii. 2010 Tomasin.
Diagnosis
Diagnosis. Ocular pigment absent; dorsal shield without colour pattern; integument of dorsal shield with eight very lightly developed areas of radiating lines on inner surface; Cx-IV posterior to IV-L insertion without a longitudinal ridge; genital field with 70–75 pairs of acetabula on well-defined genital plates; III/IV-L- 4 / 5 each with one short swimming seta.
Description
Description. Female (male unknown)—Dorsal and ventral shields present; dorsal shield L 533, W 500, with eight very lightly developed areas of radiating lines on inner surface (two pairs laterally, one pair each anteriorly resp. posteriorly, see Fig. 9 D); ventral shield L 569, W 538; tips of Cx-I ending posterior to frontal margin; genital field L 238, W 166, gonopore L/W 125 / 106, ratio 1.18, genital plates well defined, with 70–75 pairs of acetabula (Fig. 8 B); palp (Figs. 8 C–D) total L 216–223, L/H, L/H ratio: P-1, 32/ 31, 1.04; P-2, 60– 62 / 45–46, 1.3–1.4; P-3, 39– 40 / 42–43, 0.91–0.93; P-4, 66– 70 / 34–38, 1.86–1.94; P-5, 19/ 8, 2.4; L P- 2 /P- 4 ratio 0.88–0.91; palpal segments rotated, distal end of the uncate P- 4 with one long, thin seta; gnathosoma vL 115; chelicera total L 112; dL of I–L- 4–6 (Fig. 8 E): 62, 77, 97; dL of IV–L: 75, 69, 71, 95, 110, 110; III/IV–L- 4 / 5 each with one short swimming seta (Fig. 8 F).
Etymology
Etymology. Named after the country where the new species was detected.
Discussion
Remarks. In addition to probable adaptations to the subterranean habitat (the absence of ocular pigment and of a colour pattern on the dorsal shield), the new species is characteristic in the presence of an increased number of acetabula located on well-defined acetabular plates, the Cx-IV without lateral ridges posterior to leg insertions, and presence of one short swimming seta on III–IV–L each. This species has no close relatives among recent congeners, but a decision about its eventual taxonomic status above species level can be made only when the presently unknown male of A. vietnamitica is described.
Distribution
Distribution.Vietnam; only known from the locus typicus.
Taxon Treatment
- Pešić, Vladimir; Gerecke, Reinhard; 2014: Water mites from caves of the Ha Giang province, northern Vietnam (Acari: Hydrachnidia), Zootaxa 3774: 376-376. doi
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