Aturus borneoensis, Smit, Harry & Pešić, Vladimir, 2014

Smit, Harry & Pešić, Vladimir, 2014, Water mites from Mount Kinabalu and the Crocker Range, Borneo, Malaysia (Acari: Hydrachnidia), with the description of 34 new species, Zootaxa 3876 (1), pp. 1-71 : 64

Aturus borneoensis n. sp.

( Figs. 39A–D )

Type series. Holotype male, Kipungit River, Poring Hot Springs, Mt Kinabalu, 6º 0 2.776 N 116º 41.432 E, alt. 568 m asl, 15-ix-2012 ( RMNH).

Diagnosis. Idiosoma posteriorly with a notch; posterior margin with two large hyaline, nearly rounded extensions and two small hyaline externsions; associated setae of dgl-1 simple, more stout than other dorsal setae; lgl-setae simple; dorsum posterior to dorsal shield with a transverse row of setae; P2 with a medial extension with a stout seta; IV-leg-4 ventrally with two long and three shorter, simple setae.

Description. Male: Idiosoma dorsally 308 long and 275 wide, ventrally 356 long. Dorsal shield 251 long and 227 wide, posteriorly with two cavities; anteriorly of these cavities are dgl-3, posteriorly are dgl-4. Anterior twothird of dorsal shield papillate, posterior third without papillae. Associated setae of dgl-1 large, simple, more stout that other dorsal setae; margin of upwardly-bent ventral shield posterior to dorsal shield with a transverse row of setae, posterior idiosoma margin with numerous long, curved setae. Posterior idiosoma margin in the gonopore area with a notch flanked by two pairs of inflated setae, one pair balloon- shaped, the other, more ventrally clubshaped. Genital field with 13–15 acetabula along posterior margin, anterolateral pair larger than other acetabula. Length/height of P1–P5: 20/14, 49/34, 42/27, 78/30, 28/10. P2 with a medial extension with a stout seta; P4 stocky, a bit bulging ventrally, with one stout ventral seta. Length of I-leg-4–6: 68,70, 50. Length of III-leg-4–6: 100, 112, 82; III-leg not modified Length of IV-leg-4–5: 100, 98; IV-leg-4 with two long and three shorter, simple setae. IVleg-5 posteroventrally with two longer setae and a row of five shorter setae, anteroventrally with two short and two longer setae. Excretory pore located dorsally.

Female: Unknown.

Etymology. Named for its occurrence on the island of Borneo.

Remarks. The four hyaline inflated setae in combination with P2 with a stout seta is diagnostic for the new species. A number of Palaearctic species have inflated setae also (i.e. A. spatulifer Piersig, 1904 , A. fontinalis Lundblad, 1920 ), but differ in either longer posterior setae and/or differently shaped hyaline extensions and P2 without a stout seta.

Distribution. Borneo; known only from the locus typicus.

Figures

FIGURES 39 A – D. Aturus borneoensis n. sp., holotype male. A = dorsal view; B; C = palp; D = IV-leg- 4 – 5. Scale bars = 50 Μm.