Pentacentrus Saussure, 1878

Dai, Jin-Hong, Xie, Can-Hong & Ma, Li-Bin, 2024, Pentacentrus rectangulus sp. nov., the twelfth Pentacentrus species recorded in China (Orthoptera: Gryllidae; Pentacentrinae), Zootaxa 5514 (6), pp. 585-588 : 586

Key to the species of Pentacentrus Saussure known from China

1. Occiput with longitudinal yellow stripe.................................. Pentacentrus multicapillus Liu & Shi, 2011

-- Occiput without longitudinal yellow stripe................................................................. 2

2. The color of scape and peduncle segments different from the first three flagellar segments......................................................................................... Pentacentrus medogensis Zong, Qiu & Liu, 2017

-- The color of scape and peduncle segments same as the first three flagellar segments................................ 3

3. Lateral lobes of the epiphallus not touching.................................. Pentacentrus parvulus Liu & Shi, 2014

-- Lateral lobes of the epiphallus touching.................................................................... 4

4. Lateral lobes of the epiphallus with hook-like sclerites........................................................ 5

-- Lateral lobes of the epiphallus without hook-like sclerites..................................................... 6

5. Lateral lobes of the epiphallus with setae on the dorsal surface and at apex....... Pentacentrus transversus Liu & Shi, 2015

-- Lateral lobes of the epiphallus with setae only at the apex..................... Pentacentrus biflexuous Liu & Shi, 2014

6. Dorsum of lateral lobes of the epiphallus covered with tufts of bristles........................................... 7

-- Apex of lateral lobes of the epiphallus covered with tufts of bristles............ Pentacentrus emarginatus Liu & Shi, 2014

7. In lateral view, apex of epiphallus sharply bent dorsally at a right angle................. Pentacentrus rectangulus sp. nov.

-- In lateral view, apex of epiphallus not bent or slightly bent..................................................... 8

8. Ectoparamere longer than lateral lobes of the epiphallus....................................................... 9

-- Ectoparamere shorter than lateral lobes of the epiphallus..................................................... 10

9. Lateral lobes of the epiphallus form a triangular shape.................... Pentacentrus acutiparamerus Liu & Shi, 2014

-- Lateral lobes of the epiphallus form an elongated shape................... Pentacentrus sororius Zong, Qiu & Liu, 2017

10. In lateral view, apex of ectoparamere bent ventrally............................ Pentacentrus formosanus Karny, 1915

--- In lateral view, apex of ectoparamere bent dorsally.......................................................... 11

11. Pronotum with yellow longitudinal stripes................................... Pentacentrus bituberus Liu & Shi, 2011

--- Pronotum without yellow longitudinal stripes....................... Pentacentrus dulongjiangensis Li, Xu, & Liu, 2019

Taxonomy

Family Gryllidae Laicharting, 1781

Subfamily Pentacentrinae Saussure, 1878

Genus Pentacentrus Saussure, 1878

Pentacentrus Saussure, 1878: 539

Chinese name: K̊ĸ

Type species: Pentacentrus pulchellus Saussure, 1878

Diagnosis. Body slender, pubescent. Vertex inclined. Cheeks narrow. Ocelli arranged linearly. Antennal scape as wide as frontal rostrum. Pronotum with anterior field narrower than posterior field. Anterior tibiae only equipped with internal tympanum. Forelegs and midlegs almost equal in length. Tegmen ornamented with dark patches, patchy near the basal field, striped near the apical field. Forewings extending beyond the abdominal tip. Hindwings longer than the forewings.