Cyclogethes Kirejtshuk 1979
Creators: name: Liu, Meike
name: Wang, Xinyue
name: Yang, Xingke
name: Huang, Min
name: Audisio, Paolo
name: Gardini, Pietro
name: Sabatelli, Simone
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Nitidulidae
Cyclogethes

description: Key to identification of species of the genus Cyclogethes
[from Jelínek (2000b), updated and modified; Figs 5, 6 herein re-inked and slightly modified from Jelínek (2000b) and Kirejtshuk (1979, 1980)].
1 (2) Metatibiae peculiarly narrow (ratio MTLE/MTWI= 4.5–4.7), in both sexes markedly sinuated along their inner edge (Figs 2f–g), their outer edge without a series of spinules (only with a short series of very small hairs distad). Elytra without any trace of transversal strigosity, distinctly longer than their combined width, ratio ELLE/ELWI≈ 1.15 (Figs 1a, 2a). The whole body yellowish-brown, at most with barely darker, infuscate elytral discal portion. Male genitalia and ovipositor as figured (Figs 1b–d). Body length: 2.2–2.5 mm. SW China (Yunnan) (Fig. 4)................................... C. tibialis sp. nov.
2 (1) Metatibiae in both sexes wider (ratio MTLE/MTWI= 2.7–3.6), simply arcuated along their inner edge and not sinuated (Figs 11, 22–23 in Jelínek 2000b; Figs 6e–g herein), their outer edge with a series of normal, dense and moderately long spinules. Elytra with more or less distinct traces of transversal strigosity, shorter than or at most as long as their combined width (ratio ELLE/ELWI≈ 0.8–1.0)................................................................................. 3
3 (4) Elytra nearly as long as their combined width, ratio ELLE/ELWI ≈ or <1.0. Meso- and metatibiae markedly narrower than in the following species, ratio MTLE/MTWI= 3.5–3.6 (Fig. 22 in Jelínek 2000b; Fig. 6f herein). Prosternal process narrowed apically (Fig. 5 in Jelínek 2000b; Fig. 6a herein). Body yellowish-brown, elytra, metaventrite and abdomen blackish-brown to blackish, tips of elytra and apical margin of hypopygium yellowish. Male genitalia as figured (Figs 16–17 in Jelínek 2000b; Figs 5e–f herein). Ovipositor: Fig. 84 in Kirejtshuk 1980; Fig. 6h herein. Body length: 2.1–2.3 mm. N India (Uttar Pradesh, Uttarakhand), Nepal (Fig. 4)..................................................... C. aldridgei Kirejtshuk, 1980
4 (3) Elytra shorter than their combined width, ratio ELLE/ELWI <1.0. Meso- and metatibiae markedly wider than in the preceding species, ratio MTLE/MTWI= 2.8–3.0 (Figs 11, 23 in Jelínek 2000b; Figs 6e, g herein). Prosternal process not narrowed apically (Figs 6 –7, 9 in Jelínek 2000b; Figs 6b–d herein)............................................................. 5
5 (6) Prosternal process narrow, parallel-sided (Fig. 6 in Jelínek 2000b; Fig. 6b herein). Male: tegmen with deep V-shaped excision and smooth ventrolateral margins, median lobe of aedeagus broadly arcuately emarginate apically (Figs 18–19 in Jelínek 2000b; Figs 5g –h herein). Ovipositor: Fig. 43 in Kirejtshuk 1979 and in Fig. 6k herein. Length 1.9–2.1 mm. Vietnam, N Thailand, NE India (Darjeeling), SW China (Yunnan, Guizhou) (Fig. 4).............................. C. abnormis Kirejtshuk, 1979
6 (5) Prosternal process wider, and with more or less arcuate lateral margins (Figs 7, 9 in Jelínek 2000b; Figs 6c–d herein). Male: tegmen more elongate, its ventrolateral margins with series of incisions (Figs 12–13, 20 in Jelínek 2000b; Figs 5a–b, 5i herein).............................................................................................. 7
7 (10) Elytra transversely strigose with distinct, sometimes oblong, punctures.......................................... 8
8 (9) Male: genitalia (Figs 34–36 in Kirejtshuk 1979; Figs 5k–m herein) similar to those of C. orientalis, tegmen with shallow apical emargination reaching about one fifth of its length, incisions of ventrolateral margins situated more proximally than the bottom of the emargination; median lobe of the aedeagus parallel-sided, slender, with narrow terminal protuberance gently curved in lateral view. Ovipositor: Fig. 37 in Kirejtshuk 1979; Fig. 6j herein. Body length 1.9–2.1 mm. Vietnam, SW China (Yunnan) (Fig. 4).................................................................... C. spathulatus Kirejtshuk, 1979
9 (8) Male: tegmen (Figs 12–13 in Jelínek 2000b; Figs 5a–b herein) with apical emargination reaching about two fifths of its length, ventrolateral margins with series of incisions situated immediately at the tips of lateral lobes; median lobe of aedeagus without terminal protuberance (Figs 14–15 in Jelínek 2000b; Figs 5c–d herein). Ovipositor unknown. Body length 1.7–1.8 mm. NW Thailand (Fig. 4)................................................................ C. fuscipennis Jelínek, 2000
10 (7) Elytra transversely strigose without distinct punctures. Male: genitalia resembling those of C. spathulatus, tegmen with apical emargination reaching about one third of its length and series of incisions on ventrolateral margins situated besides the bottom of the incision; median lobe of the aedeagus slender, parallel-sided with narrow terminal protuberance strongly hooked in lateral view (Figs 20–21 in Jelínek 2000b; Figs 5i–j herein). Ovipositor: Fig. 30 in Kirejtshuk 1979; Fig. 6i herein. Body length 1.9–2.1 mm. Vietnam, N and S Thailand (Fig. 4)..................................... C. orientalis Kirejtshuk, 1979
description: Published as part of Liu, Meike, Wang, Xinyue, Yang, Xingke, Huang, Min, Audisio, Paolo, Gardini, Pietro & Sabatelli, Simone, 2024, A new Chinese Cyclogethes pollen beetle, with an updated key to species of the genus and notes on its phylogenetic positioning (Coleoptera: Nitidulidae: Meligethinae), pp. 359-372 in Zootaxa 5406 (2) on pages 367-370, DOI: 10.11646/zootaxa.5406.2.8, http://zenodo.org/record/10618518