Helochares (Hydrobaticus) zamora, 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 : 46-48

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Helochares (Hydrobaticus) zamora

n. sp.

Helochares (Hydrobaticus) zamora   n. sp.

Figs. 2D View FIGURE 2 , 5E View FIGURE 5 , 7B View FIGURE 7 , 10B View FIGURE 10 .

Type material. Holotype (male): “ECUADOR:/ Zam.-Chin. Prov. / Zamora / 9 June 1976 / A. Langley et al. ”, “collected in/ roadside pool”, “ECUADOR PEACE CORPS/ SMITHSONIAN INSTITUTION/ AQUATIC INSECT SURVEY”. ( USNM)   . Paratypes (4): ECUADOR: Pastaza Province: 21 km W. Puyo, 9.v.1977, leg. P.J. Spangler & D.R. Givens, “PGS, DRG-23” (1 male, USNM)   ; Zamora-Chinchipe Province: Same data as holotype (1 male, SEMC; 1 female, UNSM)   ; Yanzatza, 7.xi.1979, Rio Yanzatza , sandy margin, leg. J. Anderson (1 male, USNM)   .

Differential diagnosis. Body size 4.7–4.8 mm. Clypeus appearing dark brown in median third, with lateral thirds distinctly paler ( Fig. 5E View FIGURE 5 ). Elytra with ten rows of serial punctures, usually appearing weakly impressed into striae ( Fig. 2D View FIGURE 2 ). Abdominal ventrites uniformly dark brown; pubescence dense and evenly distributed, the longest hairs shorter than those on the metaventrite. Aedeagus ( Fig. 7B View FIGURE 7 ) 2.2-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 only slightly diverging on apical half; median lobe with apex broadly rounded.

The coloration of the pronotum, which is entirely darkened, will separate this species from all others, as well as the distinct form of the aedeagus.

Description. In addition to differential diagnosis: pronotum dark brown throughout except for anterior and lateral margins, which appear slightly paler ( Fig. 2D View FIGURE 2 ). Ground punctation on head and pronotum moderately impressed. Elytra appearing nearly parallel-sided to slightly broader posteriorly.

Distribution. Ecuador ( Fig. 10B View FIGURE 10 ). All three colleting events are from the eastern lowlands of the Andes.

Etymology. Named after the type locality of Zamora, Ecuador.

Biology. Three specimens are listed as being found in a “roadside pool”, while another was collected along the “sandy margin” of a river.


Smithsonian Institution, National Museum of Natural History


University of Kansas - Biodiversity Institute