New records of water mites from Southeast Asia (Acari: Hydrachnidia) with the description of two new genera and 12 new species Author Pešic, V. Author Smit, H. text Acarologia 2016 2016-07-22 56 3 393 433 http://dx.doi.org/10.1051/acarologia/20162251 journal article 10.1051/acarologia/20162251 2107-7207 5395976 Hexaxonopsis laosensis n. sp. ( Figures 13-14 , 15 A-B) Type material — Holotype male, dissected and slide mounted, Laos , 15-33-1, Kouangxi Waterfall , lentic bay within a pond behind a travertine barrier within the main brook, 19°44’55.9"N , 101°59’33.4"E , alt. ca. 490 m a.s.l. , water depth 0.5 m , substrate: travertine mud covered by some leaves . Paratypes : 4/5/0, same data as holotype, one female dissected and slide mounted . Diagnosis — Dorsal shield colour pattern consisting of a light-reddish elongated central patch; lateral margins posterior to IV-L insertions with developed triangular projection on each side of ventral shield. Description — Dorsal and ventral shields anteriorly lightly fused; dorsal shield with seven pairs of glandularia (the seventh pair inconspicuous, flanking the excretory pore); postocularia well distanced from anterior margin; excretory pore projecting, located at the posterior end of dorsal shield; anterior portion of dorsal shield with 14-15 pairs of triangular, posteriorly-directed (hyaline?) denticles ( Figures 13A , 14A ); dorsal shield colour as shown in Figures 15 A-B; eye pigment well developed. Ventral shield oval, slightly truncate at anterior end, lateral margins rounded, with well developed triangular projection on each side ( Figures 13B , 14B ), posterior to the insertions of IV-L. Lateral margins of Cx-I/II with 1-3 strong, hook-like, posteriorly-directed projections; two pairs of glandularia in region between genital field and opening for insertion of IV-L, these relatively close together; a relatively long longitudinal ridge posterior to IV-L insertions. Genital field with three pairs of Ac, arranged in an arc. Palp: ventral margin of P-2 convex, distal margin of P- 3 with well developed hyaline extensions, ventral margin of P-4 convexly protruding in the centre, here with two seta (one long and heavy, another long and slender) on small elevated ridges ( Figures 13 C-D,14C). Legs: number of swimming setae: II-