Javalbia rotunda, 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 : 357

Javalbia rotunda n. sp.

( Figure 11 )

Material examined. Holotype male, Stream near Haewsai Waterfall, Nam Nao NP, Thailand, 16°40.668N 101°41.856E, alt. 425 m a.s.l., 16-xi-2007.

Diagnosis — A2 not fused with dorsal shield; postocularia lying anteromedially of dgl-1; dgl-4 absent, only associated setae present; anterior coxae close to anterior idiosoma margin; gonopore nearly rounded.

Description — Male: Idiosoma yellowish, dorsally 421 long and 275 wide, ventrally 413 long. Dorsal shield 405 long and 235 wide; excretory pore fused with dorsal shield. A2 not fused with dorsal shield, postocularia lying anteromedially of dgl-1; dgl-4 absent, only associated setae present. Glandularia platelets in dorsal furrow small. Coxae lying far anteriorly, but not reaching anterior idiosoma margin. Coxal suture lines incomplete. Cxgl-4 lying closer to fourth leg sockets than to genital field. Genital field with three pairs of acetabula, fused with ventral shield. Gonopore nearly rounded, 44 long and 40 wide. Vgl-4 fused with ventral shield. Length of P1-5: 20, 40, 30, 56, 29. Length of I-leg-4- 6: 70, 68, 66 (till tip of segment).Length of IV-leg-4-6: 88, 96, 72. Legs without swimming setae. Female: Unknown.

Etymology — Named for the nearly rounded gonopore.

Remarks — Few Javalbiopsis species have the postocularia anteromedially of dgl-1: Javalbia kinabaluensis Smit and Peši´c, 2014 has the genital field separate from the ventral shield, J. magniseta Smit and Peši´c, 2014 has very large dorsal setae and the coxae lying less anteriorly, J. reticulata Smit and Peši´c, 2014 has a less rounded gonopore and dgl-2 and -3 without glandularia and J. nova n. sp. has dgl-4 with glandularia.

Figures

FIGURE 11: Javalbia rotunda n. sp., holotype male: A – dorsum; B – venter; C – palp. Scale bars = 50 µm.