Helochares
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publication ID |
https://doi.org/10.11646/zootaxa.4407.1.2 |
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publication LSID |
lsid:zoobank.org:pub:B45E9ABD-CB52-4EE7-91D6-783E8E958AC5 |
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DOI |
https://doi.org/10.5281/zenodo.3803384 |
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persistent identifier |
https://treatment.plazi.org/id/676A87E0-FFB7-B15E-2392-FB2D47900F17 |
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treatment provided by |
Plazi |
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scientific name |
Helochares |
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Key to the New World species of the Helochares subgenus Hydrobaticus
1. Elytra with distinct rows of serial punctures, sometimes deeply impressed into grooves (e.g., Fig. 2A View FIGURE 2 , C–E). Size variable (4.2– 6.6 mm). Widely distributed............................................................................. 2
- Elytra without rows of serial punctures ( Figs. 2B View FIGURE 2 , 4 View FIGURE 4 ). Size larger than 5.5 mm. Mexico and Central America.............. 8
2. Abdominal pubescence sparse and not uniformly distributed on each ventrite ( Fig. 6A View FIGURE 6 ). Abdominal ventrites uniformly very dark brown to almost black in coloration. Elytra with rows of serial punctures not impressed into striae............................................................................................ H. normatus (LeConte) (in part)
- Abdominal pubescence dense and uniform, not appearing sparse or absent on anterior half of each ventrite (e.g. Fig. 6 View FIGURE 6 B–D). Abdominal ventrites variously colored. Elytra with rows of serial punctures impressed into striae or not................. 3
3 Size larger (> 5.8 mm). Elytral serial punctures not impressed into striae or only very weakly so; absent or almost appearing absent anteromedially ( Fig. 2A View FIGURE 2 ).............................................................. H. trujillo n. sp.
- Size variable (4.2–6.0 mm). Elytra with rows of serial punctures impressed into striae or not; rows distinctly present anteromedially............................................................................................... 4
4 Abdominal ventrites pale in color, either uniformly yellowish brown or yellowish brown on lateral thirds with median third darker brown......................................................................................... 5
- Abdominal ventrites uniformly dark brown to almost black in color..............................................6
5 Parameres of aedeagus truncate at apex, with outer corners widely rounded ( Fig. 7 View FIGURE 7 F–H). More southern distribution ( Panama, Ecuador, Venezuela)....................................................................... H. nexus n. sp.
- Parameres of aedeagus with apex oblique to truncate, with outer corners widely rounded ( Fig. 8 View FIGURE 8 ). More northern distribution (this rarer form known from Mexico)............................................ H. normatus (LeConte) (in part)
6 Clypeus pale in coloration, not darkened medially ( Fig. 5A View FIGURE 5 ). Eastern North America............. H. maculicollis Mulsant
- Clypeus distinctly darkened medially ( Fig. 5E, H View FIGURE 5 ). South America............................................... 7
7 Pronotum almost entirely darkly colored ( Fig. 2D View FIGURE 2 ). Size smaller (4.7–4.8 mm). Ecuador................ H. zamora n. sp.
- Pronotum only darkened on central disc ( Fig. 2E View FIGURE 2 ). Size larger (5.2–5.5 mm). Peru............................ H. sp. A
8 Clypeus pale in coloration, not darkened medially ( Fig. 5G View FIGURE 5 ). Aedeagus with median lobe broadly rounded, with only a small “pinched” apex ( Fig. 7K View FIGURE 7 )............................................................... H. championi Sharp
- Clypeus distinctly darkened medially ( Fig. 5I View FIGURE 5 ). Aedeagus with median lobe tapered to a point at apex ( Fig. 7 View FIGURE 7 I– J)......... 9
9 Aedeagus with apex of parameres rounded ( Fig. 6I View FIGURE 6 ); 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................................................................................................... H. politus n. sp.
- Aedeagus with apex of parameres truncate ( Fig. 6J View FIGURE 6 ); lateral outer margins of parameres parallel along basal two thirds, slightly constricted at two thirds, diverging along apical third; maximum width of aedeagus at basal half, clearly narrower than maximum width of aedeagus at apical half........................................................... H. laevis n. sp.
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