Platyscelis, Latreille, 1818

Bai, Xing-Long & Ren, Guo-Dong, 2019, Revision of the genus Platyscelis Latreille, 1818 from China (Coleoptera: Tenebrionidae: Platyscelidini), Zootaxa 4609 (1), pp. 101-126: 102-103

publication ID

https://doi.org/10.11646/zootaxa.4609.1.4

publication LSID

lsid:zoobank.org:pub:5C8DF6F4-2918-47A8-8D56-37240B8E5B90

persistent identifier

http://treatment.plazi.org/id/039287CC-FFE3-FF8E-7BB4-FCB8FA3BDB98

treatment provided by

Plazi

scientific name

Platyscelis
status

 

Key to species of the genus Platyscelis  from China (based on males)

1 Lateral carina of elytra reaching sutural angle, visible completely in dorsal view................................... 2

- Lateral carina of elytra merging with epipleura, not reaching sutural angle, visible completely or only in anterior part in dorsal view............................................................................................... 3

2 Elytral surface without longitudinal carinae or indistinct; outer margin of protibiae straight, outer angle of apex rectangular; metatibiae weakly curved; apex of parameres nearly straight in lateral view ( Fig. 34View FIGURES 21–36)................................................................................................. Platyscelis (Pleiopleura) ovata Ballion, 1878 

- Elytral surface with longitudinal carinae obviously; distal part of outer margin of protibiae obviously curved to inner side, outer angle of apex obtuse; metatibiae obviously curved; apex of parameres curved to ventral side in lateral view ( Fig. 36View FIGURES 21–36)................................................................. Platyscelis (Pleiopleura) striata Motschulsky, 1859 

3 Anterior margin of pronotum deeply emarginate, strial punctures merging into longitudinal long furrows at sides, interstriae with extremely dense and coarse punctures; distal part of parameres wrapped in a hat ( Figs. 29–30View FIGURES 21–36)................................................................................. Platyscelis (Platyscelis) subcordata Seidlitz, 1893 

- Anterior margin of pronotum weakly emarginate or straight, strial punctures not merging into longitudinal long furrows at sides; distal part of parameres not wrapped in a hat ( Figs. 5–28, 31–32View FIGURES 5–20View FIGURES 21–36).......................................... 4

4 Outer margins of parameres without hooks at apex in dorsal view ( Figs. 7, 15View FIGURES 5–20)..................................... 5

- Outer margins of parameres with hooks at apex in dorsal view ( Figs. 5, 9, 11, 13, 17, 19View FIGURES 5–20, 21, 23, 25, 27, 31View FIGURES 21–36)............. 6

5 Pronotum with sparse punctures on disc, moderately dense and shallow at sides, narrowly depressed or weakly flatted at sides of basal; elytra long oval; apex of protibiae moderately extended; protarsi wide, mesotarsi narrower than protarsi; apex of parameres strongly narrower than base in dorsal view and hook-liked curved to dorsal side in lateral view ( Figs. 7–8View FIGURES 5–20)...................................................................... Platyscelis (Platyscelis) amdoensis Egorov, 1989 

- Pronotum with dense punctures on disc, denser at sides, widely flatted at sides from base to middle; elytra short oval; apex of protibiae strongly extended; protarsi narrow, mesotarsi nearly equal to protarsi; apex of parameres weakly narrower than base in dorsal view and straight in lateral view ( Figs. 15–16View FIGURES 5–20).............. Platyscelis (Platyscelis) brevis Baudi di Selve, 1876 

6 Elytral surface covered with soft and thick setae ( Figs. 37–38View FIGURES 37–38).................................................. 7

- Elytral surface covered with soft setae occasionally, especially at apex, or nearly without any setae.................... 8

7 Elytral surface with long thick setae ( Fig. 38View FIGURES 37–38); metatibiae straight and narrow; parameres narrowing towards apex arcuately, outer margins with extremely weak hooks at apex in dorsal view, apex not curved to dorsal side in lateral view ( Figs. 21–22View FIGURES 21–36).................................................................. Platyscelis (Platyscelis) freyi Kaszab, 1940 

- Elytral surface with short thick setae ( Fig. 37View FIGURES 37–38); metatibiae curved, wide and flat; parameres narrowing towards apex straightly, outer margins with long and sharp hooks at apex in dorsal view, apex curved to dorsal side in lateral view ( Figs. 5–6View FIGURES 5–20)........................................................................ Platyscelis (Platyscelis) acutipenis  sp. nov. 8 Elytral surface without longitudinal carinae or traces......................................................... 9

- Elytral surface with longitudinal carinae and traces.......................................................... 14

9 Posterior angles of pronotum rectangular, sharp and weakly protruded outward apically........................................................................................... Platyscelis (Platyscelis) suiyuana Kaszab, 1940 

- Posterior angles of pronotum obtuse or rectangular, neither sharp nor protruded outward apically..................... 10

10 Pronotal punctures extremely dense and coarse and merged at sides; parameres wide and short in dorsal view ( Fig. 27View FIGURES 21–36)...................................................................... Platyscelis (Platyscelis) licenti Kaszab, 1940 

- Pronotal punctures unconnected at sides; parameres long in dorsal view ( Figs. 9, 11, 13, 19View FIGURES 5–20)......................... 11

11 Parameres narrow, narrowing from base to apex gradually at sides in dorsal view ( Figs. 9, 11View FIGURES 5–20); elytral punctures shallow, nearly disappeared at apex................................................................................... 12

- Parameres wide at base, emarginate at middle at sides in dorsal view ( Figs. 13, 19View FIGURES 5–20); elytral punctures clear............. 13

12 Pronotum not depressed along lateral margins; outer margins of parameres with short and obtuse hooks at apex in dorsal view, apex curved to ventral side in lateral view ( Figs. 9–10View FIGURES 5–20).... Platyscelis (Platyscelis) angusticollis angusticollis Kaszab, 1940 

- Pronotum depressed along lateral margins from base to middle; outer margins of parameres with long and sharp hooks at apex in dorsal view, apex straight in lateral view ( Figs. 11–12View FIGURES 5–20).... Platyscelis (Platyscelis) angusticollis platytarsis Kaszab, 1940 

13 Elytra apically wide and nearly straight, emarginate at sutural angle, surface with dense and deep punctures; parameres moderately narrowing towards apex in dorsal view, apex curved to dorsal side in lateral view ( Figs. 13–14View FIGURES 5–20)................................................................................ Platyscelis (Platyscelis) bogatshevi Egorov, 1989 

- Elytra apically round, not emarginate at sutural angle, surface with sparse punctures; parameres strongly narrowing towards apex in dorsal view, apex curved to ventral side in lateral view ( Figs. 19–20View FIGURES 5–20)..................................................................................................... Platyscelis (Platyscelis) densipunctata  sp. nov.

14 Lateral carina of elytra wide, visible completely in dorsal view........... Platyscelis (Platyscelis) confusa Schuster, 1934 

- Lateral carina of elytra narrow, apex not visible in dorsal view occasionally...................................... 15

15 Punctures extremely dense and moderately coarse on head; pronotal punctures dense and coarse at sides, and merged partially; parameres obviously wide in dorsal view, apex curved to dorsal side occasionally in lateral view ( Figs. 23–24View FIGURES 21–36).......................................................................... Platyscelis (Platyscelis) gebieni Schuster, 1915 

- Punctures dense and fine on head; pronotum with unconnected oval dense and fine punctures at sides; parameres narrow in dorsal view, dorsal side straight in lateral view ( Figs. 25–26View FIGURES 21–36)................. Platyscelis (Platyscelis) helanensis  sp. nov.