Erebaxonopsis kipungitensis n. sp.

(Figs. 35A–D)

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

Diagnosis. Anterior margins of Cx-I/-II each with a group of teeth; IV-leg-1, IV-leg-3 and IV-leg4 with distoventral extensions.

Description. Male: Colour yellowish, idiosoma 428 long and 340 wide. Dorsal shield 324 wide, broadly fused anteriorly to ventral shield, with five pairs of glandularia. Lateral eyes reduced. Anterior margins of Cx-I/-II each with a group of teeth. Genital field with four pairs of acetabula, the three anterior in a transverse line, the fourth flanking the posterior gonopore. Genital skeleton 203 long, Length/height of P1-P5: 24/15, 40/30, 20/19, 54/23, 21/ 10; P1 with an posteriorly located dorsal seta, P2 stocky, P4 rather stocky, ventral margin somewhat bulging with one seta. Length of I-leg-4–6: 34, 38, 40. Length of IV-leg-4–6: 32, 35, 30; fourth legs stocky, IV-leg-1, -3 and – 4 with an anteroventral extension, IV-leg-1 with three heavy dorsal setae, IV-leg-3 short, IV-leg-4 widening anteriorly with a large, curved ventral seta, IV-leg-5 widened also anteriorly with 3 heavy anteroventral setae, IVleg-6 not modified. Legs without swimming setae.

Female: Unknown.

Etymology. Named after the type locality, the Kipungit River.

Remarks. The new species differs from all described species of the genus in the presence of anteroventral extensions on IV-leg 1 and -5. Erebaxonopsis nearctica Cook, 1974 (California), E. morimotoi Imamura, 1958 (Japan, only female known) and E. amamiensis Imamura, 1961 (Japan, only female known) have IV-leg-3 only with an anteroventral extension.

Distribution. Borneo; known only from the locus typicus.