Stenothemus, Bourgeois, 1907
|
publication ID |
https://doi.org/ 10.5852/ejt.2021.757.1409 |
|
publication LSID |
lsid:zoobank.org:pub:171E0461-2EFC-4E53-8FC3-D902A1AE26DA |
|
DOI |
https://doi.org/10.5281/zenodo.5038624 |
|
persistent identifier |
https://treatment.plazi.org/id/03C7082F-3C54-8F30-FF67-FA1BFADCFD4B |
|
treatment provided by |
Felipe |
|
scientific name |
Stenothemus |
| status |
|
Key to the species of Stenothemus from Southwest China
1. Pronotum subrounded, with protruding and acute posterior angles ................................................. 2
– Pronotum subquadrate, with nearly rectangular and obtuse posterior angles .................................. 7
2. Elytra yellow, with irregular dark brown markings .......................................................................... 3
– Elytra yellow or brown, without dark markings ............................................................................... 4
3. Aedeagus ( Fig. 2G‒I View Fig ): ventral process of each paramere nearly parallel to dorsal plate in lateral view, laterophyses feebly exceeding middle emargination between dorsal plates; female reproductive system ( Fig. 4C View Fig ): spermathecal duct very long, slightly longer than diverticulum ............................ .................................................................................................................... S. diffusus Wittmer, 1974
– Aedeagus ( Fig. 6A‒C View Fig ): ventral process of each paramere at an obvious angle to dorsal plate in lateral view, laterophyses clearly exceeding middle emargination between dorsal plates; female reproductive system ( Fig. 8A View Fig ): spermathecal duct moderately long, much shorter than diverticulum .............................................................................................. S. grahami Wittmer, 1974
4. Aedeagus: dorsal plate of each paramere acute at apex .................................................................... 5
– Aedeagus: dorsal plate of each paramere rounded at apex ............................................................... 6
5. Body larger, more than 7.5 mm in length; aedeagus ( Švihla 2004: figs 155‒156): apical part of dorsal plate strongly narrowed, middle emargination between dorsal plates very deep, longer than half its length .............................................................................................................. S. jindrai Švihla, 2004
– Body smaller, 6.6 mm in length; aedeagus ( Fig. 10G‒I View Fig ): apical part of dorsal plate slightly narrowed, middle emargination between dorsal plates moderately deep, nearly as long as half its length ........ ...................................................................................... S. jindraimimus Y. Yang & X. Yang sp. nov.
6. Body yellow, pronotum darkened at anterior angles; aedeagus ( Švihla 2004: figs 161‒163): dorsal plates of parameres separated from each other, ventral process of each paramere slightly thickened apically ............................................................................................................. S. benesi Švihla, 2004
– Body brown, pronotum lightened at anterior angles; aedeagus ( Fig. 2A‒C View Fig ): dorsal plates of parameres approaching each other, ventral process of each paramere distinctly thickened apically .................. ............................................................................................... S. shaanxiensis Švihla, 2004 stat. nov.
7. Body uniformly black ( Fig. 1E View Fig ) ..................................................................... S. dundai Švihla, 2004
– Body at least bicolored ..................................................................................................................... 8
8. Pronotum distinctly widened anteriorly; aedeagus ( Fig. 6D‒F View Fig ): dorsal plates of parameres conjoined, with a rounded emargination in middle of apical margin .... S. minutissimus (Pic, 1933) comb. nov.
– Pronotum nearly parallel-sided; aedeagus: dorsal plates of parameres separated ............................ 9
9. Middle antennomeres without smooth impressions in males ......................................................... 10
– Middle antennomeres with smooth impressions in males ...............................................................11
10. Head, pronotum and scutellum testaceous, elytra yellow .... S. singularicollis (Pic, 1933) comb. nov.
– Head and pronotum black brown, scutellum yellow, elytra black ( Fig. 5C View Fig ) .. S. tryznai Švihla, 2004
11. Antennae flattened or thickened, very long, almost reaching apices of elytra in males ................. 12
– Antennae simple filiform, moderately long, at most extending to ¾ length of elytra in males ...... 13
12. Antennomeres IV‒XI flattened; aedeagus ( Fig. 11A‒C View Fig ): ventral process distinctly thickened apically, bent dorsally in lateral view; apex of laterophyses exceeding middle emargination between dorsal plates ..................................................................................... S. laticornis Y. Yang & H. Liu sp. nov.
– Antennomeres IV‒XI cylindrically thickened; aedeagus ( Fig. 10A‒C View Fig ): ventral process slightly narrowed apically, bent ventrally in lateral view; apex of laterophyses not reaching middle emargination between dorsal plates ............................ S. chongqingensis Y. Yang & H. Liu sp. nov.
13. Pronotum yellow, nearly as long as wide; aedeagus ( Fig. 10D‒F View Fig ): lateroapical part of dorsal plate longitudinally ridged; female reproductive system ( Fig. 12C View Fig ): diverticulum and spermatheca extremely long, diverticulum much shorter than spermatheca ........................................................... ................................................................................................. S. flavicollis Y. Yang & S. Ge sp. nov.
– Pronotum reddish brown or black, distinctly longer than wide; aedeagus: dorsal plate not ridged; female reproductive system: diverticulum and spermatheca moderately long, diverticulum much or slightly longer than spermatheca .................................................................................................... 14
14. Aedeagus ( Fig. 2D‒F View Fig ): ventral process of each paramere moderately long, apex of laterophyses not reaching middle emargination between dorsal plates; abdominal sternite VIII ( Fig. 3B View Fig ): lateroapical angles widely rounded, posterior margin roundly emarginate in middle, sclerotized membrane simple, without rectangular longitudinal sclerite ............................. S. davidi ( Pic, 1926) comb. nov.
– Aedeagus ( Fig.6G‒I View Fig ): ventral process of each paramere short, apex of laterophyses clearly exceeding middle emargination between dorsal plates; abdominal sternite VIII ( Fig. 7D View Fig ): lateroapical angles triangular and protruding, posterior margin rectangularly emarginate in middle, sclerotized membrane with a rectangular sclerite present at center and a small longitudinal sclerite on each side ............... ................................................................................................ S. gracilis Y. Yang & X. Yang sp. nov.
Note
Stenothemus kansuensis Pic, 1933 is not included in the key because the type was not located by us.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.