Javalbia siamis, Smit, 2016

Smit, H., 2016, The water mite family Aturidae Thor, 1900 from Southeast Asia (Acari: Hydrachnidia) with the description of one new genus and 14 new species, Acarologia 56 (3), pp. 341-365 : 351-354

Javalbia siamis n. sp.

( Figure 8 )

Material examined — Holotype male, Stream downstream of Huoay Meng Waterfall, between Chiang Saen and Chiang Khong, Thailand, 20°18.095N 100°22.454E, 20-xi-2007.

Diagnosis — Genital field with four pairs of acetabula, A2 not fused with dorsal shield, excretory pore on a separate platelet.

Description — Male: Idiosoma yellowish, dorsally 478 long and 343 wide, ventrally 405 long. Dorsal shield 463 long and 287 wide; postocularia far distanced from dgl-1, the latter lying close to margin of dorsal shield. A2 not fused with dorsal shield. Three pairs of relatively small glandularia platelets present in dorsal furrow. Suture lines of coxae obliterated. Cxgl-4 halfway between fourth leg sockets and genital field. Genital field 150 wide, with four pairs of acetabula. Gonopore 65 long and 40 wide. Vgl-4 fused with ventral shield. Excretory pore on a small platelet posteriorly of genital field. Length of P1-5: –, 36, 36, 56, 31. Length of I-leg-4-6: 58, 60, 54 (till tip of segment). Length of IV-leg-4-6: 68, 72, 56. Swimming setae absent. Female: Unknown.

Etymology — Named after the old name for

Thailand.

Remarks — The new species differs from J. ovata Kim and Chung, 1996 from Korea ( Kim and Chung 1996) in the free-lying anterolateral dorsal glandularia (fused in J. ovata ), and the postocularia distanced and posteromedially from the nearest pair of dorsal glandularia (lying much closer and at the same line of glandularia pair).

Figures

FIGURE 8: Javalbia siamis n. sp., holotype male: A – dorsum; B – venter; C – palp. Scale bars = 50 µm.