Helochares (Hydrobaticus) trujillo, Short & Girón, 2018

Short, Andrew Edward Z. & Girón, Jennifer C., 2018, Review of the Helochares (Hydrobaticus) MacLeay of the New World (Coleoptera: Hydrophilidae: Acidocerinae), Zootaxa 4407 (1), pp. 29-50 : 45-46

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Helochares (Hydrobaticus) trujillo

n. sp.

Helochares (Hydrobaticus) trujillo   n. sp.

Figs. 2A View FIGURE 2 , 5F View FIGURE 5 , 7A View FIGURE 7 , 9A View FIGURE 9 , 10B View FIGURE 10 .

Type material. Holotype (male): “VENEZUELA: Merida State / Merida, Monte Zerpa Area / small roadside stream; 14.i.2006 / AS-06-027/ leg. A.E.Z. Short ”. ( MIZA)   . Paratypes (10): VENEZUELA: Merida: Same data as   holotype [8°37'48.9"N, 71°9'39.9666"W] (5, SEMC, MIZA, MALUZ, including DNA voucher SLE1192) GoogleMaps   . Trujillo: Laguna Agua Negra , 9°18' 22.3812"N, 70°10'30.9714"W, 21.i.2009, margin of lagoon, leg. Short, García, & Camacho, VZ 09-0121-04X (2, SEMC); same locality but 13.vii.2009, leg. Short et al., VZ09-0713-03A (3, SEMC, MIZA; includes DNA voucher SLE0034) GoogleMaps   .

Differential diagnosis. Body size 5.8–6.6 mm. Clypeus pale yellow to light brown in color, slightly darkened posteromedially ( Fig. 5F View FIGURE 5 ). Elytra with ten distinct rows of serial punctures; rows 1–4 not reaching the base of the elytra; rows 1–2 weakly impressed into shallow striae along most of their length ( Fig. 2A View FIGURE 2 ). Abdominal ventrites uniformly dark brown; pubescence dense and evenly distributed, the longest hairs shorter than those on the metaventrite. Aedeagus ( Fig. 7A View FIGURE 7 ) nearly 2.4-times longer than its greatest width; apex of parameres truncate, with outer corners forming a rounded right angle; inner corners of apex of parameres forming an acute angle; lateral outer margins of parameres diverging on apical third; median lobe with apex gradually tapering to an acute point.

Description. In addition to differential diagnosis: dorsal coloration yellow to medium brown, pronotal disc moderately darker ( Fig. 2A View FIGURE 2 ).

Distribution. Venezuela (Merida Andes region) ( Fig. 10B View FIGURE 10 ).

Etymology. Named after one of the Venezuelan states in which this species was collected.

Biology. All three collections of this species were made in densely vegetated, muddy margins of creeks and lagoons at high elevations (> 1800 m). This species has been observed to carry its egg case.


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