Stenothemus Bourgeois, 1907
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publication ID |
https://doi.org/ 10.11646/zootaxa.5047.2.3 |
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publication LSID |
lsid:zoobank.org:pub:0C398339-EF37-45C2-AA8C-3BDAF601E2AB |
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persistent identifier |
https://treatment.plazi.org/id/03F9A67D-FF96-FFE0-FF0C-5F8DFA4A4AF7 |
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treatment provided by |
Plazi |
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scientific name |
Stenothemus Bourgeois |
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Key to the species of Stenothemus Bourgeois
1. Female with abdominal tergite VIII curled ventrally on both sides ( Yang et al., 2014: figs 9‒10); male genitalia: ventral process of each paramere elongate and more or less expanded terminally, dorsal plate strongly narrowed apically, ventral process and dorsal plate bent ventrally together ( Yang et al. 2014: figs 21‒41).......................... S. harmandi species-group
- Female with abdominal tergite VIII normal, not as above; male genitalia: ventral process and dorsal plate of each paramere normal, not as above or hardly bent ventrally.............................................................. .. 2
2. Body stout, less than 4.0 × as long as wide; head width across eyes nearly as long as or narrower than anterior margin of pronotum in males; male genitalia: dorsal plates simple and not layered............................................ .. 3
- Body slender or stout, if stout, dorsal plates layered in the middle; if slender, the body more than 4.0 × as long as wide, head width across eyes wider than anterior margin of pronotum in males................................................................................all other species (including dozens of species will be treated in a forthcoming work)
3. Scutellum pitch black; male genitalia: ventral processes of parameres slender and bent inwards at apical part in ventral view, not thickened at apex, laterophyses tilting ventrally at an angle of more than 45° with dorsal plates, compressed and longitudinally divided at apical part ( S. laterophysus species-group)......................................................... 4
- Scutellum yellow; male genitalia: ventral processes of parameres stouter and diverging apically in ventral view, thickened at apex, laterophyses relatively parallel to dorsal plates, expanded apically, divided at apices ( S. notaticollis species-group)... 5
4. Head with a triangular marking on vertex, legs mostly yellow, black at apical part of femora and basal part of tibiae ( Fig. 1A View FIGURE 1 ); male genitalia: ventral processes of parameres nearly as long as dorsal plates, laterophyses stout at basal part and abruptly narrowed apically in ventral view ( Švihla 2004: fig. 146).................................. S. laterophysus Švihla, 2004
- Head with a longitudinal marking on vertex, legs mostly black, yellow at coxae, trochanters and basal part of femora ( Fig. 2A View FIGURE 2 ); male genitalia: ventral processes of parameres longer than dorsal plates, laterophyse slender and evenly narrowed in ventral view ( Figs 3A‒C View FIGURE 3 )..................................................................... S. nigritibius sp. nov.
5. Head and elytra pitch black, pronotum mostly pitch black, yellowish brown or reddish brown at anterior angles.......... 6
- Head and elytra pale-yellow or brown, pronotum pale-yellow with black brown markings on disc...................... 7
6. Male antennae shorter and slightly over elytral half-length, antennomeres II slightly longer than wide at apices, III more longer than II ( Fig. 2C View FIGURE 2 ); male genitalia: strongly swollen laterally at basal part in ventral view, dorsal plates longer than ventral processes of parameres, with outer apical angles acute in dorsal view ( Figs 3G‒I View FIGURE 3 ).................... S. acutiapicis sp. nov.
- Male antennae longer and reaching apical one-third length of elytra, antennomeres II obviously longer than wide at apices, III less longer than II ( Fig. 2B View FIGURE 2 ); male genitalia: moderately swollen laterally at basal part in ventral view, dorsal plates nearly as long as ventral processes of parameres, with outer apical angels subrounded in dorsal view ( Figs. 3D‒F View FIGURE 3 ).................................................................................................. S. parameratus sp. nov.
7. Male genitalia: dorsal plates evenly narrowed apically, ventral processes with apices directing ventrally in ventral view ( Wittmer, 1974: fig. 1)............................................................. S. notaticollis ( Gorham, 1895)
- Male genitalia: dorsal plates abruptly narrowed in the middle, ventral processes with apices directing laterally in ventral view ................................................................................................... 8
8. Head and elytra uniformly pale-yellow, legs mostly yellow, tibiae and tarsi dark brown ( Švihla, 2011: fig. 24); male genitalia: dorsal plates narrower and acute at apices, with nearly straight inner margins ( Švihla, 2011: figs 105‒107).................................................................................................. S. tamil Švihla, 2011
- Head and elytra mostly black brown, with reddish brown marking on vertex, leg black brown, coxae, trochanters and basal part of femora yellowish brown; male genitalia: dorsal plates wider, subrounded at apices and widely emarginate at inner margins ( Wittmer, 1974: fig. 3; Švihla, 2011: figs 108‒109)..................................... S. bourgeoisi Wittmer, 1974
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