Coecobrya oculata, 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 : 14-16

publication ID	https://doi.org/ 10.5852/ejt.2016.226
DOI	https://doi.org/10.5281/zenodo.3853065
persistent identifier	https://treatment.plazi.org/id/6D0587ED-D710-F239-3665-A36DA1885D65
treatment provided by	Valdenar
scientific name	Coecobrya oculata
status	sp. nov.

Treatment

Coecobrya oculata sp. nov.

urn:lsid:zoobank.org:act:ABEEC710-582D-4381-9D81-83C2D5948912

Figs 1D View Fig , 8 View Fig ; Table 1 View Table 1

Diagnosis

Small size; eyes 1+1; clypeal chaetae ciliate; chaeta R, H 1, H 2, X, X 2 and X 4 ciliate on the ventral side of head; unguiculus lanceolate with outer edge serrate; Abd. IV with 4+4 central and 8+8 lateral mac.

Etymology

Named after the presence of eyes.

Material examined

Holotype CHINA: ♀ on slide, Guangxi, Shanglin, Longshan, Jinlun Dong , 23.45239° N, 108.74154° E, 19 Mar. 2005, Louis Deharveng and Anne Bedos leg. (# CHIgx05-137 ). Deposited in NJAU. GoogleMaps

Paratypes CHINA: ♀ on slide and 5 in alcohol, same data as holotype; GoogleMaps 3 ♀♀ on slides and 4 in alcohol, Guangxi, Shanglin, Longshan, Ganlin Dong , 23.45932° N, 108.73436° E, 18 Mar. 2005, Louis Deharveng and Anne Bedos leg. (# CHIgx05-136 ). Deposited in MNHN. GoogleMaps

Description

Body length up to 1.38 mm. Body colour white ( Fig. 1D View Fig ).

Antenna 1.6–1.7 times as long as cephalic diagonal. Antennal segments ratio as I: II: III: IV = 1: 1.5–1.8: 1.2–1.6: 2.6–2.7. Long, smooth straight chaetae absent on antennae.Ant. II distally with 1 small rod-like S-chaeta. Ant. III organ with 2 rods. Ant. IV not annulated.

Eyes 1+1. Clypeal chaetae ciliate but their arrangement not clearly seen. Dorsal cephalic chaetotaxy with 4 sutural chaetae and 5(4) mac in Gr. II ( Fig. 8B View Fig ). Lateral process of labial palp straight, thicker than normal chaetae ( Fig. 8C View Fig ). Labial base as mRel 1 l 2, chaeta R ciliate and 0.45–0.60 length of M; chaetae H 1, H 2, X, X 2 and X 4 ciliate; chaeta X 3 absent ( Fig. 8D View Fig ). Cephalic groove with 6 chaetae, the first and the third smooth and others ciliate.

Trochanteral organ with 9–13 smooth spine-like chaetae; 7–9 in arms and 2–4 between them ( Fig. 8E View Fig ). Inner differentiated tibiotarsal chaetae ciliate with ciliations not closely appressed to axis. Ungual basal paired teeth unequal, outer one large. Unguiculus lanceolate with outer edge serrate ( Fig. 8F View Fig ). Abd. IV 3.0–4.4 times as long as Abd. III along dorsal midline. Ventral tube anteriorly with 4 ciliate chaetae on each side and two of them much larger ( Fig. 8G View Fig ); posteriorly with 6 smooth chaetae ( Fig. 8H View Fig ); each lateral flap with 5 smooth chaetae and 1 additional ciliate chaeta rarely present. Manubrial plaque with 2 pseudopores and 3(2) ciliate chaetae. Distal smooth part of dens slightly longer than mucro ( Fig. 8I View Fig ).

Th. II with 4 (m1, m1i, m2, m2i) medio-median, 3 (m4, m4i, m4p) medio-lateral and 21–23 posterior mac. Th. III with about 29 mac; m5i, a6i, p5, m6e, m6i as mac; a4i2 and a6i sometimes absent in young specimens ( Fig. 8J View Fig ). Abd. I with 6 (m2–4, m2i, a3, m4p) mac. Abd. II with 3 (a2, m3, m3e) central and 1 (m5) lateral mac. Abd. III with 1 (m3) central and 3 (am6, pm6, p6) lateral mac ( Fig. 8K View Fig ). Abd. IV with 4 central (A6, B4–5, M), 8 lateral mac; F2 and F3 as mac ( Fig. 8L View Fig ). Abd. V with 3 sens ( Fig. 8M View Fig ). S-chaetae formula: 2+ms, 2/1+ms, 2, 2+ms, 2, 3. About 6 long S-like chaetae on Abd. IV.

Ecology

Cave-restricted species, non-troglomorphic.

Remarks

Coecobrya oculata sp. nov. is characterized by small size, 1+1 eyes, ciliate chaetae R, H 1, H 2, X, X 2 and X 4 on the ventral side of head, serrate outer edge of unguiculus, absence of ms on Abd. III and 4+4 central mac on Abd. IV. See Table 1 View Table 1 for comparison with other Chinese cave species.