Review of the Helochares (Hydrobaticus) MacLeay of the New World (Coleoptera: Hydrophilidae: Acidocerinae)
Author
Short, Andrew Edward Z.
Author
Girón, Jennifer C.
text
Zootaxa
2018
2018-04-09
4407
1
29
50
journal article
22806
10.11646/zootaxa.4407.1.2
8e0aac3a-6556-4b96-a67e-fce9f0db0ba9
1175-5326
3766290
B45E9ABD-CB52-4EE7-91D6-783E8E958AC5
Helochares (Hydrobaticus) politus
n. sp.
Figs. 4A
,
5I
,
7I
,
10B
.
Type material.
Holotype
(male):
“
GUATEMALA
: Departamen-/to de
Huehuetenango
,/
11 km
N. Santa Eulalia
/ on road to
San Mateo
/
Ixtantan
,/
2865m
5.II>1965/
D. E. Breedlove
” (
CAS
).
Differential diagnosis.
Body size
6.6 mm
. Clypeus dark yellow with the central third darkened to dark brown. Elytra without any detectable serial punctures or striae (
Fig. 4A
). Abdominal ventrites uniformly dark brown; pubescence dense and evenly distributed, the longest hairs shorter than those on the metaventrite. Aedeagus (
Fig. 7I
) 2.5-times longer than its greatest width; apex of parameres rounded, with outer corners widely rounded; inner corners of apex of parameres forming a nearly right angle; lateral outer margins of parameres parallel, slightly constricted near midlength; maximum width of aedeagus at basal half, nearly as wide as maximum width of aedeagus at apical half; median lobe with apex gradually tapering to an acute point.
This species is extremely similar to
H. laevis
, from which it can only be definitively separated by the form of the aedeagus (
Fig. 7I
).
Description.
In addition to differential diagnosis: pronotum dark brown to black in central half (
Fig. 4A
). Ground punctation on head and pronotum moderately impressed, slightly less impressed on the elytra.
Distribution.
Guatemala
(
Fig. 10B
). The single specimen was taken at a very high elevation (
2865m
).
Etymology.
Politus
(L), after the smooth elytra which lacks any coarse serial punctures or striae.
Biology.
Nothing is known about the biology of this species.