Drabescus Stal 1870
Creators: name: Xu, Deliang
name: Zhang, Yalin
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cicadellidae
Drabescus

description: Key to species (males) of Drabescus from China
Note. The following species are not included in the key: D. albostriatus, D. extensus and D. fuscorufous (only known from the female) and type specimens of D. atratus and D. notatus (unknown sex).
1 Head strongly triangularly produced, median length approximately three times as long as next to eyes; crown and frontoclypeus with the median bulging longitudinal ridges.............................................. D. mucronatus sp. nov.
- Head rounded or angularly produced, median length nearly as long as next to eyes or less than twice as long as next to eyes; crown and frontoclypeus regions without ridge.............................................................. 2
2 Anterior margin of head conspicuously produced angularly in lateral view; aedeagus with dorsoatrium present or absent, preatrium present or absent............................................................................. 3
- Anterior margin of head broadly rounded in lateral view; aedeagus without dorsoatrium, preatrium present... D. hainanensis
3 Aedeagal shaft without process in ventral view.............................................................. 4
- Aedeagal shaft with process in ventral view................................................................ 7
4 Style without subapical tooth-like process.................................................................. 5
- Style with small subapical tooth-like processes................................................. D. multipunctatus
5 Ventral margin of pygofer side without serrate process subapically.............................................. 6
- Ventral margin of pygofer side with serrate processes subapically..................................... D. cuspidatus
6 Aedeagal shaft dorsolaterad expanded subapically in lateral view..................................... D. henanensis
- Aedeagal shaft not expanded subapically in lateral view.............................................. D. ineffectus
7 Dorsal margin of aedeagal shaft without tooth in lateral view................................................... 8
- Dorsal margin of aedeagal shaft with middle fine teeth in lateral view................................. D. bilaminatus
8 Aedeagal shaft with a pair of processes.................................................................... 9
- Aedeagal shaft with two pairs of processes................................................... D. quadrispinosus
9 Aedeagal shaft with process bifurcate apically............................................................. 10
- Aedeagal shaft with process not bifurcate apically.......................................................... 14
10 Bifurcate branch of aedeagus without small process......................................................... 11
- Bifurcate branch of aedeagus with small process................................................... D. jinxiuensis
11 Aedeagal shaft subapically expanded in lateral view......................................................... 12
- Aedeagal shaft not expanded subapically in lateral view...................................................... 13
12 Valve triangular; subgenital plates with inner margin constricted........................................ D. furcatus
- Valve arciform; subgenital plates with inner margin relatively straight.................................. D. lamellatus
13 Aedeagal shaft relatively short, tapered to acute apex.................................................. D. gracilis
- Aedeagal shaft relatively long and cylindrical, apex rounded................................................ D. lii
14 Aedeagal shaft with process shorter than or subequal to length of shaft.......................................... 15
- Aedeagal shaft with process longer than length of shaft............................................ D. formosanus
15 Crown, pronotum and scutellum totally bright yellow................................................. D. pallidus
- Crown, pronotum and scutellum not as above.............................................................. 16
16 Head and thorax with yellowish medial longitudinal band.................................................... 17
- Head and thorax not as above........................................................................... 20
17 Connective with stem more than twice the length of arms.................................................... 18
- Connective with stem less than twice the length of arms...................................................... 19
18 Aedeagus without dorsoatrium................................................................. D. albosignus
- Aedeagus with dorsoatrium developed............................................................ D. piceatus
19 Dorsal margin of aedeagal process with irregular dentate processes in lateral view...................... D. multidentatus
- Dorsal margin of aedeagal process not as above..................................................... D. ogumae
20 Style without subapical tooth-like process................................................................. 21
- Style with subapical tooth-like processes......................................................... D. convolutus
21 Aedeagal shaft distally expanded in lateral view............................................................ 22
- Aedeagal shaft distally not expanded in lateral view......................................................... 25
22 Style with lateral lobe prominent........................................................................ 23
- Style without lateral lobe...................................................................... D. minipenis
23 Aedeagal shaft with process extending nearly to apex of shaft in lateral view..................................... 24
- Aedeagal shaft with process extending nearly to half of shaft in lateral view........................... D. shillongensis
24 Connective Y-shaped, stem longer than arms.............................................. D. macrocladus sp. nov.
- Connective U-shaped, stem shorter than arms..................................................... D. pellucidus
25 Aedeagal shaft relatively straight in lateral view............................................................ 26
- Aedeagal shaft curved dorsad in lateral view............................................................... 28
26 Style with apical process wide, rather thick and relatively short................................................ 27
- Style with apical process narrow and very long.................................................. D. albofasciatus
27 Anteclypeus and frontoclypeus black................................................................ D. piceus
- Anteclypeus and frontoclypeus yellowish brown.................................................... D. testaceus
28 Aedeagal shaft with process extending nearly to apex of shaft................................................. 29
- Aedeagal shaft with process extending nearly to mid-length of shaft............................................ 30
29 Style with lateral lobe prominent; connective U-shaped........................................ D. nervosopunctatus
- Style without lateral lobe; connective Y-shaped...................................................... D. vilbastei
30 Connective with stem slender, longer than arms.................................................. D. limbaticeps
- Connective with stem robust, nearly as long as arms................................................... D. nitobei
description: Published as part of Xu, Deliang & Zhang, Yalin, 2023, Taxonomy of the leafhopper genus Drabescus Stål (Hemiptera: Cicadellidae Deltocephalinae) with description of two new species from China, pp. 393-404 in Zootaxa 5264 (3) on pages 396-397, DOI: 10.11646/zootaxa.5264.3.7, http://zenodo.org/record/7836835