Coecobrya gejianbangi, Zhang & Bedos & Deharveng, 2016

Zhang, Feng, Bedos, Anne & Deharveng, Louis, 2016, Cave-dwelling Coecobrya from southern China with a survey of clypeal chaetae in Entomobryoidea (Collembola), European Journal of Taxonomy 226, pp. 1-21 : 3-7

publication ID	https://doi.org/ 10.5852/ejt.2016.226
DOI	https://doi.org/10.5281/zenodo.3853063
persistent identifier	https://treatment.plazi.org/id/6D0587ED-D71F-F230-3640-A3D0A49F58A1
treatment provided by	Valdenar
scientific name	Coecobrya gejianbangi
status	sp. nov.

Treatment

Coecobrya gejianbangi sp. nov.

urn:lsid:zoobank.org:act:FB0EB4BF-5950-4CFF-BC3A-A01347DB95C3

Figs 1A View Fig , 2 View Fig , 3 View Fig , 9B View Fig ; Table 1 View Table 1

Diagnosis

Size large; Ant. IV annulated; 11 ciliate clypeal chaetae; labial chaetae X 1 and M 1 present; unguis elongate and devoid of unpaired tooth; unguiculus truncate with a tiny tooth on outer edge; 9+9 mac on Abd. I with a1 as mac; Abd. II with 4+4 central mac; Abd. IV with 4+4 central and 9+9 lateral mac.

Etymology

Named after Mr. Jianbang Ge, who provided help for our trip in the Mulun Natural Reserve.

Material examined

Holotype

CHINA: ♀ on slide, Guangxi, Huanjiang, Mulun Natural Reserve, Dong Qiao Dong , 25.181667° N, 108.008611° E, altitude 440 m, 5 Nov. 2009, Tian MY leg. (# CHIgx09-077). Deposited in NJAU. GoogleMaps

Paratypes

CHINA: 2 ♀♀ on slides and 5 ♀♀ in alcohol, same data as holotype. One paratype deposited in NJAU and others in MNHN.

Description

Body length up to 4.2 mm. Body colour white ( Fig. 1A View Fig ).

Antenna 2.5–2.7 times as long as cephalic diagonal. Antennal segments ratio as I: II: III: IV = 1: 1.4–1.9: 1.1–1.9: 3.6–4.3. Long smooth straight chaetae absent on antennae. Ant. II distally with 3 dorsal rod-like S-chaetae. Two internal S-chaetae of Ant. III organ slightly expanded ( Fig. 2A View Fig ). Ant. IV distinctly annulated under light microscope but annulations not easily seen under stereoscope.

Eyes absent. Clypeal chaetae 11, all ciliate ( Fig. 9B View Fig ). Dorsal cephalic chaetotaxy with 5 sutural (S) and 4 mac in Gr. II ( Fig. 2B View Fig ). Lateral process of labial palp as thick as normal chaetae ( Fig. 2C View Fig ). Labial chaetae as m 1 m 2 rel 1 l 2; r and X 1 as spiny mic; chaetae X, X 2 and X 4 as ciliate mic; chaeta X 3 absent ( Fig. 2D View Fig ). Cephalic groove with 8 chaetae, anterior five smooth and others ciliate.

Trochanteral organ with 17–20 smooth spine-like chaetae; 8–9 in arms and 8–12 between them ( Fig. 2E View Fig ). Partial inner differentiated tibiotarsal chaetae ciliate with ciliations not closely appressed to axis. Unguis narrow with 2 subequal tiny inner teeth near base; unpaired tooth absent. Unguiculus truncate with a tiny tooth on outer edge ( Fig. 2 View Fig F–G). Abd. IV 4.0–5.0 times as long as Abd. III along dorsal midline. Ventral tube anteriorly with about 7 ciliate chaetae on each side ( Fig. 2H View Fig ); posteriorly with 16–18 chaetae, three of them smooth ( Fig. 2I View Fig ); each lateral flap with 7–8 smooth chaetae ( Fig. 2J View Fig ). Manubrial plaque with 2 pseudopores and 4 ciliate chaetae ( Fig. 2K View Fig ). Distal smooth part of dens 0.7–0.8 times as long as mucro.

Th. II with 3 medio-medial (m1, m2, m2i), 3(2) medio-lateral (m4, m4i, m4p) and 25–26 posterior mac; p4–5 and p4i as mac; mac m4i rarely absent. Th. III with about 35 mac; mac m5i and a6i present; p3p rarely present ( Fig. 3A View Fig ). Abd. I with 9 (a1–3, m2–4, m2i, m4i, m4p) mac. Abd. II with 4 (a2, a3, m3, m3e) central and 1 (m5) lateral mac. Abd. III with 1 (m3) central and 4 (a7, am6, pm6, p6) lateral mac; ms absent ( Fig. 3B View Fig ). Abd. IV with 4 central (I, M, B5, A6), 9 lateral mac (F1–3, F3a, E2–4, E2p, D3) and several additional large mesochaetae or small mac laterally ( Fig. 3C View Fig ). Abd. V with 3 sens ( Fig. 3D View Fig ). S-chaetae formula: 2+ms, 2/1+ms, 2, 2+ms, 2, 3. Uncertain number of longer S-like chaetae on Abd. IV.

Ecology

Cave-restricted species.

Remarks

Coecobrya gejianbangi sp. nov. is characterized by a very large size, distinctly annulated Ant. IV, elongate unguis devoid of unpaired tooth, 11 ciliate clypeal chaetae, labial chaetae X 1 and M 1 present, mac a1 on Abd. I, mac a2 and a3 on Abd. II, mac a7 on lateral Abd. III, and 9+9 lateral mac on Abd. IV. It is closest to another cave species, C. ciliata sp. nov., but differs from it in labial chaetae, and abdominal chaetotaxy ( Table 1 View Table 1 ).