Torrenticola (Torrenticola) bhutana, Pesic, Vladimir & Smit, Harry, 2007

Pesic, Vladimir & Smit, Harry, 2007, First records of water mites (Acari: Hydrachnidia) from Bhutan, with description of two new species, Zootaxa 1613, pp. 45-56 : 50-53

publication ID

https://doi.org/ 10.5281/zenodo.178993

DOI

https://doi.org/10.5281/zenodo.6242748

persistent identifier

https://treatment.plazi.org/id/6D381B73-FFD4-F349-35A2-0504FB97FD8C

treatment provided by

Plazi

scientific name

Torrenticola (Torrenticola) bhutana
status

sp. nov.

Torrenticola (Torrenticola) bhutana sp. nov.

( Figs. 21–30 View FIGURES 21 – 24 View FIGURES 25 – 31. 25 – 30 )

Type series. Holotype: male ( ZMAN), dissected and slide mounted in Hoyer's fluid. Bhutan: Pele La, 01.05.2002, 3200 m asl. Paratypes ( ZMAN, MNHP): four females, same data and place as holotype, one of them dissected and slide mounted in Hoyer's fluid.

Diagnosis. Cx-4 posteriorly extended beyond genital field in both sexes; P-2 long and slender, ventral projection on P-2 and P-3 blunt, one (of 4) P-4 ventral setae long.

Description. Male: Idiosoma (ventral view: Fig. 22 View FIGURES 21 – 24 ) L 875, W 625; dorsal shield ( Fig. 21 View FIGURES 21 – 24 ) L 706, W 531, L/W ratio; dorsal plate 656; shoulder plate L 209, W 81, L/W ratio 2.6; frontal plate L 153, W 63, L/W ratio 2.4; shoulder/frontal plate L ratio 1.37; gnathosomal bay L 157, Cx-1 total L 344, Cx-1 medial L 187, Cx-2+3 medial 61; ratio Cx-1 L/Cx-2+3 medial L 1.84; Cx-1 medial L/Cx-2+3 medial L 5.6; genital field L/W 172/ 116, L/W ratio 1.48, ejaculatory complex ( Fig. 27 View FIGURES 25 – 31. 25 – 30 ) L 253; distance genital field–excretory pore 188, genital field–caudal idiosoma margin 288; capitulum ventral L 369; chelicera L 327; palp ( Figs. 23–24 View FIGURES 21 – 24 ) total L 287, dL and %L (in parentheses, given as % of total L): P-1 29 (10.1), P-2 98 (34.1), P-3 60 (20.9), P-4 85 (29.6), P-5 15 (5.2); P-2/P-4 ratio 1.15; ventral margin of P-2 slightly convex, ventral projections of P-2 and P-3 blunt, ventral protuberances of P-4 ending in two tips separated by a concavity.

Female: Idiosoma (ventral view: Fig. 26 View FIGURES 25 – 31. 25 – 30 ) L 938, W 719, dorsal shield ( Fig. 25 View FIGURES 25 – 31. 25 – 30 ) L 756, W 588, L/W ratio 1.29; dorsal plate 700; shoulder plate L 268, W 81, L/W ratio 3.3; frontal plate L 166, W 78, L/W ratio 2.1; shoulder/frontal plate L ratio 1.6; gnathosomal bay L 181, Cx-1 total L 356, Cx-1 medial L 175, Cx-2+3 medial 41; ratio Cx-1 L/Cx-2+3 medial L 2.0; Cx-1 medial L/Cx-2+3 medial L 8.7; genital field L/W 197/ 167, L/W ratio 1.18; distance genital field–excretory pore 194, genital field–caudal idiosoma margin 325; capitulum ( Fig. 28 View FIGURES 25 – 31. 25 – 30 ) ventral L 381; chelicera L 438; palp ( Figs. 29–30 View FIGURES 25 – 31. 25 – 30 ) total L 306, dL and %L (in parentheses, given as % of total L): P-1 33 (10.8), P-2 108 (35.3), P-3 62 (20.3), P-4 89 (29.1), P-5 14 (4.6); P-2/P-4 ratio 1.21; shape and setation as in male.

Discussion. Due to sub-apical Cx-4, one (of 4) P-4 ventral setae long, a long rostrum, a short median suture line of Cx-2+3 and Cx-4 extended posterior to the genital flaps in both sexes, T. bhutana sp. nov. resembles Torrenticola semisuta (Halík) . T. bhutana sp. nov. can be distinguished from T. semisuta by the shape of the ejaculatory complex (conventional in shape with well-developed proximal horns in T. semisuta - compare Fig. 27 View FIGURES 25 – 31. 25 – 30 with Fig. 31 View FIGURES 25 – 31. 25 – 30 ), and the blunt P-2 ventral projection not strongly curved distally (P-2 ventral extension strongly curved distally in T. semisuta ). According to Wiles (1997) the projections of P-2 are probably variable in shape and therefore the blunt projections may not be a good character for separating species. Further differences in T. semisuta regard the shortened postgenital area in male and Cx-4 more strongly extended posterior to the genital flaps in the female.

From T. dolichorhyncha Lundblad , a species similar in the shape of the palp (P-2 long and slender, ventral projections on P-2 and P-3 blunt), T. bhutana sp. nov. can be distinguished by the shape of the ejaculatory complex (conventional in shape – see Lundblad 1969) and Cx-4 are extended posterior to the genital flaps.

Etymology. The species is named after country where it was collected.

Distribution. Known only from the type locality in Bhutan.

Biology. Torrenticola bhutana sp. nov. is probably a rhitrobiontic species.

ZMAN

Instituut voor Taxonomische Zoologie, Zoologisch Museum

MNHP

Princeton University

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