Hydnobius, Schmidt, 1841
publication ID |
https://doi.org/ 10.11646/zootaxa.2102.1.1 |
DOI |
https://doi.org/10.5281/zenodo.5317192 |
persistent identifier |
https://treatment.plazi.org/id/D718473F-EA14-0C06-FF1C-F995F4EE5267 |
treatment provided by |
Felipe |
scientific name |
Hydnobius |
status |
|
Key to North American species of Hydnobius View in CoL (males)
1 Parameres narrow in apical one-half, straight ( Figs. 18 View FIGURES 15–20 , 40 View FIGURES 37–42 ) ...................................................................................... 2
- Parameres not as above, broad, sinuate, or curved ( Figs. 25 View FIGURES 22–27 , 33 View FIGURES 29–35 , 48 View FIGURES 44–50 )......................................................................... 3
2 Median lobe of aedeagus gradually narrowing to acute apex ( Fig. 18 View FIGURES 15–20 ); internal sac with two elongate rows of dark setae ( Fig. 18 View FIGURES 15–20 ), setae also visible posteriorly when internal sac is inverted; antennomere 7 clearly broader than antennomere 8 ( Fig. 15 View FIGURES 15–20 ) .................................................................................................................................. H. substriatus View in CoL
- Median lobe of aedeagus abruptly narrowing to acute apex ( Fig. 40 View FIGURES 37–42 ); internal sac densely covered with small scalelike setae ( Fig. 40 View FIGURES 37–42 ); antennomere 7 narrow, hardly broader than antennomere 8 ( Fig. 37 View FIGURES 37–42 )......................... H. laticeps View in CoL
3 Parameres broad or sinuate ( Figs. 25 View FIGURES 22–27 , 33 View FIGURES 29–35 , 59 View FIGURES 55–61 ); transcontinental or eastern species..................................................... 4
- Parameres narrow and outwardly curved ( Figs. 48 View FIGURES 44–50 , 54 View FIGURES 52–54 ); western species .................................................................. 6
4 Parameres broad, with apical one-half concave medially ( Fig. 25 View FIGURES 22–27 ); small body size, length of pronotum + elytra less than 2.2 mm ................................................................................................................................................ H. pumilus View in CoL
- Parameres not as above, larger body size, length of pronotum + elytra greater than 2.2 mm..................................... 5
5 Parameres sinuate ( Fig. 33 View FIGURES 29–35 ); internal sac with a pair of sclerotized oblong lobes ( Fig. 33 View FIGURES 29–35 ), lobes may be visible also when internal sac is inverted; male protibial spur broad ( Fig. 31 View FIGURES 29–35 ) ........................................................... H. longidens View in CoL
- Parameres straight ( Fig. 59 View FIGURES 55–61 ); internal sac does not contain sclerotized lobes; male protibial spur unmodified............. ............................................................................................................................................................... H. autumnalis View in CoL
6 Mesoventrite with median carina..................................................................................................................... H. kiseri View in CoL
- Mesoventrite without median carina.......................................................................................................... H. acarinus View in CoL
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