Crossodonthina bidentata Luo & Chen, 2009

Jiang, Ji-Gang & Wang, Qing-Yun, 2024, Species groups of Crossodonthina Yosii (Collembola: Neanuridae), with the description of a new species and a new record for C. bidentata Luo & Chen, Zootaxa 5471 (2), pp. 241-252 : 249

Crossodonthina bidentata Luo & Chen, 2009

New record

Figs 2 , 11–13

Materials. Nine females, Mountain Wuyi National Nature Reserve , Fujian Province, China , on the roadside from Tongmuguan to Mountains Huanggang. Coordinates : 27°49’09”N, 117°43’17”E, alt. 1151–1156m, under humid leaves near rocks, leg. Ji-Gang Jiang, 14.v.2017 (J2017051402). Studied specimens are kept in the Key Laboratory of Zoology, Hunan University of Arts and Science ( HUAS), Changde, Hunan Province, China .

Diagnosis. Body length 2.2–2.6mm. Two eyes per side on head; Di tubercles fused on Abd. V; mandible with two teeth and two rami.

Remarks. Most characters of the sampled material from Fujian Province agree with the specimens from Zhejiang Province, the type locality of C. bidentata . Even so, some obvious differences have been noticed. The body macro and mesochaetae are always smooth ( Fig. 11 ) and the maxilla is tri-branched in Fujian’s individuals ( Figs 12–13 ), whereas the body macro and mesochaetae are serrated, and maxilla is bi-branched in Zhejiang's specimens. The hypothesis that these distinct populations belong to different species cannot be ruled out, and further studies should be carried out to confirm or refute it.

Figures

FIGURES 1–2. Habitus and color in ethanol: 1, C. quadridentata sp. nov.; 2, C. bidentata.

FIGURES 11–13. Crossodonthina bidentata from Fujian province: 11, chaetal types; 12–13, left and right maxillae, respectively.