Coecobrya draconis, Zhang, Feng & Dong, Rui-Rui, 2014

Zhang, Feng & Dong, Rui-Rui, 2014, Three new species of Coecobrya (Collembola: Entomobryidae) from southern and northwest China, Zootaxa 3760 (2), pp. 260-274 : 270-273

Coecobrya draconis sp. nov.

Figs 32–46, Tab. 1

Types. Holotype: male on slide, China: Guangxi: Huanjiang: Dacai town: Shenglonggong, alt. 222m, 24˚46’24’’N, 108˚23’07’’E, in cave, 2.xii.2012, F. Zhang and Z.-H. Li leg. (sample number GX-SLD-1). Paratypes: 3 females on slide and 2 in alcohol, same data as holotype. All deposited in NJAU.

Description. Body length up to 1.33 mm. Body with scattered orange pigment ( Fig. 32).

Antenna 2.07–2.11 times as long as cephalic diagonal. Antennal segments ratio as I: II: III: IV = 1: 1.38– 1.64: 1.19–1.24: 2.25–2.71. Smooth spiny mic at base of antennae 3 dorsal and 2 ventral on Ant.I, 1 internal, 1 external and 1 ventral on Ant.II. Ant.II distally with 1 rod-like, expanded S. Chaetae 2 and 3 of Ant.III organ expanded; chaeta 8 dagger-like; chaeta 9 as long, thin sens ( Fig. 33 ). Subapical organite of Ant.IV slender, distally swollen. Antennae without long smooth straight chaetae.

Eyes absent. Prelabral and labral chaetae 4/ 5, 5, 4, all smooth; five chaetae of the first row subequal. Papilla E with 3 guard chaetae; lateral process of labial palp thick as normal chaetae, with tip reaching beyond apex of labial papilla ( Fig. 34 ). Subapical chaeta of maxillary outer lobe slightly thicker than apical one; 3 smooth sublobal hairs on maxillary outer lobe. Labial chaetae as MREL1L2, all smooth except R, R/M=0.7; chaetae H1-4 smooth and other posterior ones ciliate; X, X2 and X4 present. Cephalic groove posterior to labium with 7 chaetae, G1 smooth and others ciliate ( Fig. 35 ). Clypeus with 7 ciliate chaetae ( Fig. 36 ). Dorsal cephalic chaetotaxy with 4 antennal (An), 3 median (M) and 5 sutural (S) mac ( Fig. 37 ).

Trochanteral organ with 10–13 smooth spiny chaetae; 8−10 in arms and 2–3 between them ( Fig. 38 ). Partial inner differentiated tibiotarsal chaetae ciliate with ciliations not closely appressed to axis. Most distal tibiotarsal whorl with 10 chaetae. Unguis with 3 inner teeth; basal paired teeth unequal at 0.25 distance from base of inner edge. Unguiculus outer edge smooth and inner edge truncate. All tenent hair pointed ( Fig. 39 ). Abd.IV 3.27–3.75 times as Abd.III in length along dorsal midline. Ventral tube anteriorly with 5+5 large ciliate chaetae ( Fig. 40 ); posteriorly with 6 proximal ciliate and 2 distal smooth chaetae; each lateral flap with 5–6 smooth and 0–3 ciliate chaetae ( Fig. 41 ). Manubrium without smooth chaetae and anterior side with 8 distal ciliate chaetae in a row. Manubrial plaque with 2+2 pseudopores and 4+4 ciliate chaetae. Distal smooth part of dens 0.7 times of mucro in length. Mucronal basal spine reaching tip of tooth ( Fig. 42 ).

Th.II with 3 medio-medial (m1, m2, m 2i), 3 medio-lateral (m4, m 4i, m4p), 20−22 posterior mac, 1 ms and 2 schaetae. Th.III with about 34 mac and 2 lateral s-chaetae ( Fig. 43 ). Abd.I with 6 (a3, m2–4, m 2i, m4p) mac, 1 ms and 1 s-chaeta. Abd.II with 3 (a2, m3, m3e) central, 1 (m5) lateral mac and 2 s-chaetae. Abd.III with 1 (m3) central, 3 (am6, pm6, p6) lateral mac and 2 s-chaetae ( Fig. 44 ). Abd.IV with 4 central (M, B4–5, A6), 7 lateral mac (D3, E2–4, E2p, F1, De 3) and about 13 s-chaetae; two s-chaetae much shorter ( Fig. 45 ). Abd.V with 3 s-chaetae ( Fig. 46 ).

Ecology. In cave.

Etymology. Named after the cave name “Shenglong” ( draconis ), which means dragon in Chinese. Remarks. Coecobrya draconis sp. nov. is the first cave species in the genus reported from China. It is characterized by distal unpaired tooth closer to paired ones on unguis, smooth outer edge and truncate inner edge on unguiculus, 4 smooth chaetae posterior to labium, presence of mac p5 on Th.II, and 4+4 central and 7+7 lateral mac on Abd. IV. It is similar to C. communis in absence of eyes and manubrial smooth chaetae, and chaetotaxy of Abd.I, Abd.III and lateral Abd.IV. It differs from the latter in claw structure, absence of postlabial chaeta X3, 4+4 chaetae on manubrial plaque, and chaetotaxy of lateral Th.III, Abd.II and central Abd.IV ( Table 1 ).

Figures

FIGURES 33 – 41. Coecobrya draconis sp. nov.: 33, Ant. III organ; 34, labial papillae E; 35, chaetae on ventral side of head; 36, clypeal chaetae; 37, dorsal cephalic chaetotaxy; 38, trochanteral organ; 39, hind claw; 40, anterior face of ventral tube; 41, posterior face and lateral flap of ventral tube.

FIGURES 42 – 43. Coecobrya draconis sp. nov.: 42, mucro; 43, thoracic chaetotaxy.

FIGURES 44 – 46. Coecobrya draconis sp. nov.: Abdominal chaetotaxy. 44, Abd. I – III; 45, Abd. IV; 46, Abd. V.