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-