Torrenticola nanshihensis, Pesic, Vladimir, Semenchenko, Ksenia A., Chatterjee, Tapas, Yam, Rita S. W. & Chan, Benny K. K., 2011

Pesic, Vladimir, Semenchenko, Ksenia A., Chatterjee, Tapas, Yam, Rita S. W. & Chan, Benny K. K., 2011, New records of water mites of the family Torrenticolidae (Acari, Hydrachnidia) with descriptions of two new species from Nanshih River system in Taiwan and redescription of Torrenticola ussuriensis (Sokolow, 1940) from the Russian Far East, ZooKeys 116, pp. 1-14 : 7

Torrenticola nanshihensis sp. n. Fig. 6

Type material.

Holotype male (NMNS-6600-001), dissected and slide mounted, Taiwan, Xindian River, 24°56'19.41"N, 121°31'38.38"E, 26.viii.2009.

Diagnosis.

Frontal platelets broad (L/W ratio about 1.5); medial suture line Cx-2+3 relatively short; Cx-4 with a prominent suture line of starting at right angle from genital field, laterally curved anteriorly; capitulum deep with a short rostrum; palp robust and compact, P-2 shorter than P-4.

Description.

Male. Idiosoma (ventral view: Fig. 6B) L 700, W 587; dorsal shield (Fig. 6A) L 641, W 481, L/W ratio 1.33; dorsal plate L 578; frontal plate L 123-125, W 81-84, L/W ratio 1.49-1.52; shoulder plate L 184, W 83, L/W ratio 2.2; L shoulder/frontal plate ratio 1.47; gnathosomal bay L 109, Cx-1 total L 253, Cx-1 medial L 142, Cx-2+3 medial 94; ratio Cx-1 L/Cx-2+3 medial L 2.7; Cx-1 medial L/Cx-2+3 medial L 1.5; genital field L/W 159/123, L/W ratio 1.3, ejaculatory complex conventional in shape, L 256; distance genital field–excretory pore 141, genital field–caudal idiosoma margin 194; capitulum (Fig. 6C) ventral L 269; chelicera total L 290; palp (Figs 6 D–E) total L 303, L: P-1 34, P-2 89, P-3 62, P-4 93, P-5 25; L P-2/P-4 ratio 0.96; P-4 with well developed ventral tubercles.

Etymology.

The species is named after Nanshih River system where it was collected.

Remarks.

Due to the deep capitulum with a short rostrum, a prominent suture line of Cx-4 starting at right angle from genital field, a relatively short medial suture line of Cx-2+3 and the similar shape of the palp with robust and compact segments, P-2 shorter than P-4, and P-4 with well developed ventral tubercles, the new species resembles Torrenticola brevirostris (Halbert, 1911). Torrenticola nanshihensis sp. n., can be easily distinguished from the latter species in having broad frontal platelets (L/W ratio about 1.5).

Disribution.

Taiwan; known only from the locus typicus.