Stygohydracarus karanovici, Pesic, Vladimir M., 2001
publication ID |
https://doi.org/ 10.5281/zenodo.4620256 |
persistent identifier |
https://treatment.plazi.org/id/EC0687CB-AF05-4931-FEBB-FA6BFD51FEAE |
treatment provided by |
Plazi |
scientific name |
Stygohydracarus karanovici |
status |
sp. nov. |
Stygohydracarus karanovici sp. nov. ( Figs. 48 View FIGURES 4 8 )
Material examined: Holotype, dissected and slide mounted in Hoyer's fluid; Yugoslavia, Crna Gora, lake Plavsko Jezero, interstitial waters, 18.02.1995, leg. Karanovic; Paratypes: 1 (in coll. Gerecke, Tübingen) and 1, same data as holotype dissected and slide mounted on Hoyer's fluid; one female, Skadar Lake, Malo Blato near Bobija, sublacustrin spring, 0 6.05.2000, leg. Pesic.
Description
Male (holotype, measurements of paratypes are given in parentheses): Idiosoma ( Fig. 2 View FIGURES 1 3 ) length 325 (327), width 283 (280.5), lateral and caudal margins regularly rounded. Dorsal shield length 290 (274), width 264 (261), ratio length/width 1.1 (1.05). Idiosoma setae well developed, arranged as in Figure 4 View FIGURES 4 8 .
Ocular pigment absent. Gnathosomal bay wide; coxal plate 1 anteriorly not remarkably protruding, their maximum width at level of anterior tip of coxal plate 2; medial suture lines of coxal plates 3 and 4 visible but weakly pronounced. Genital field ( Fig. 6 View FIGURES 4 8 ): gonopore lengths 70 (69), anteriorly truncated, the posterior half straightened, with on each side 18 19 acetabula (15 15) placed in one or two rows on an elastic strip. Gnathosoma length 93.5, chelicera total length 99 (100). Palp measurements (L/H): P 1 20/23, P 2 56/41, P3, 42/46, P4 79/50; P 5 in a transverse position, not measurable. Morphology and setation of palp ( Fig. 5 View FIGURES 4 8 ): P23 with a very low number of fine, mostly short setae. P4 with distally converging dorsal and ventral margins; ventral margin with a pit in its distal third, bearing a fine seta.
Female (in parentheses female from the Skadar Lake): Idiosoma length 388 (397), width 319 (347); dorsal shield length 339, width 286. Acetabula bearing strips fused with ventral shield ( Fig. 8 View FIGURES 4 8 ), gonopore length 122, number of genital acetabula on each side 16 18 (1517). Mouthparts without sexual dimorphism, gnathosoma length 103; chelicera length 112, height 38; palp length/height: P 1 26/29, P2 60/51, P3 46/55, P4 86/59. Morphology and setation of palp as in Figure 7 View FIGURES 4 8 .
Discussion: The new species shares such important characters as the absence of ocular pigments and body measurements with Stygohydracarus troglobius K. Viets, 1932 . As compared with S. troglobius , S. karanovici n. sp. is characterized by the following features: idiosoma setae well developed, four setae inserted on each side of the gonopore; coxal plate 1 anteriorly not remarkably protruding; in both sexes acetabula on each side, 1519 in male (1013 in S. troglobius ), 1518 in female (1112 in S. troglobius ); ratio dorsal length P4 /height 1.58 (1.79 in S. troglobius ) in male, 1.46 (1.77 in S. troglobius ) in female. The new species is similar to S. troglobius as described by Petrova (1966) (higher number of idiosomal setae, shape of suture lines and coxal plates). Stygohydracarus karanovici n. sp. differs from Petrova’s specimens by the shape of palp (if Petrova’s figures are correct, then P4 is shorter than P 2 in Bulgarian specimen) and genital field (male gonopore straightened posteriorly). Smit et al. (2000) suggested that the species published by Petrova (1966) under the name Stygohydracarus troglobius document clearly that her material did not belong to this species (if her figures were correct) and that it probably represented an undescribed species.
Etymology: The species is named after its collector Dr. T. Karanovic (Perth).
Habitat: Stygohydracarus karanovici sp. nov. is a species characteristic of interstitial waters of lakes. The female we found in the locality Malo Blato (Skadar lake), together with mite species characteristic for stagnant waters ( Unionicola crassipes , U. minor , Brachypoda versicolar etc.), was thrown out from interstitial waters by sublacustrin spring (“Oko”) during heavy rains.
Distribution: Yugoslavia ( Crna Gora); only known from the interstitial waters of the Skadar lake and Plavsko Jezerolake.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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