Coecobrya annulata Zhang & Bedos & Deharveng 2016, sp. nov.
Creators: name: Zhang, Feng
name: Bedos, Anne
name: Deharveng, Louis
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Entognatha
Collembola
Entomobryidae
Coecobrya
Coecobrya annulata

description: Coecobrya annulata sp. nov.
urn:lsid:zoobank.org:act: D7CC34A6-E891-46AA-8FBD-570CAB9C9449
Figs 1B, 4, 5, 9C; Table 1
Diagnosis
Ant. IV weakly annulated; 9 smooth clypeal chaetae; tiny mic r, X, X 2 and X 4 on the ventral side of head; partial inner differentiated tibiotarsal chaetae “smooth”; unguiculus lanceolate with a tiny tooth on outer edge; 9+9 mac on Abd. III with 2+2 lateral mac; Abd. IV with 6+6 central and 8+8 lateral mac.
Etymology
Named after the weakly annulated Ant. IV (Latin word “annulata”).
Material examined
Holotype CHINA: ♀ on slide, Guangxi, Longzhou, Dong Liang Dong, 14 Apr. 2010, Louis Deharveng and Anne Bedos leg. (# CHIgx10-03). Deposited in NJAU.
Paratypes CHINA: 2 ♀♀ on slides and 4 ♀♀ in alcohol, same data as holotype. One paratype deposited in NJAU and others in MNHN.
Description
Body length up to 3.0 mm. Body colour white or with weak orange pigments (Fig. 1B).
Antenna 2.1–2.8 times as long as cephalic diagonal. Antennal segments ratio as I: II: III: IV = 1: 1.8–2.1: 2.1–2.4: 2.7–3.4. Long smooth straight chaetae absent on antennae. Two internal S-chaetae of Ant. III organ paddle-like (Fig. 4A). Ant. IV weakly annulated in large specimens.
Eyes absent. Clypeal chaetae 9, all smooth (Fig. 9C). Dorsal cephalic chaetotaxy with 5 sutural (S) and 4(5) mac in Gr. II (Fig. 4B). Papilla E with 4 guard chaetae; lateral process of labial palp as thick as normal chaetae. Labial chaetae as mrel 1 l 2; chaetae r, X, X 2 and X 4 as smooth tiny mic; chaeta X 3 absent (Fig. 4C). Cephalic groove with 8 chaetae, anterior three and the fifth smooth and others ciliate.
Trochanteral organ with 15–23 smooth spine-like chaetae; 8–11 in arms and 7–12 between them (Fig. 4D). Partial inner differentiated tibiotarsal chaetae “smooth” with ciliations closely or moderately appressed to axis. Unguis with 3 inner teeth; 2 paired teeth unequal, outer one large. Unguiculus lanceolate with a tiny tooth, sometimes inconspicuous, on its outer edge (Fig. 4E). Abd. IV 4.6–6.2 times as long as Abd. III along dorsal midline. Ventral tube anteriorly with 7 ciliate chaetae on each side (Fig. 4F); posteriorly with 11–14 smooth chaetae (Fig. 4G); each lateral flap with 8–11 smooth. Manubrial plaque with 2(1) pseudopores and 4(5) ciliate chaetae. Distal smooth part of dens subequal to mucro in length (Fig. 4H).
Th. II with 3 medio-medial (m1, m2, m2i), 3 medio-lateral (m4, m 4i, m4p) and 24–25 posterior mac; p5 as mac (Fig. 5A). Th. III with 27–28 mac; p5, m 5i and a 6i as mac (Fig. 5B). Abd. I with 6 (m2–4, m 2i, a3, m4p) mac. Abd. II with 3 (a2, m3, m3e) central and 1 (m5) lateral mac. Abd. III with 1 (m3) central and 2 (pm6, p6) lateral mac (Fig. 5C). Abd. IV with 6 central (I, M, B4–5, A5–6), 8 lateral mac (F1–3, E2–4, E2p, D3) (Fig. 5D). Abd. V with 4 mac (m2, m3, m5, a 5i) (Fig. 5E). 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 with troglomorphic characters (long antennae, slightly modified claw, large size).
Remarks
Coecobrya annulata sp. nov. is characterized by annulated Ant. IV, two paddle-like internal S-chaetae of Ant. III organ, tiny mic r, X, X 2 and X 4 on the ventral side of head, 9 smooth clypeal chaetae, an outer tiny tooth on unguiculus (sometimes inconspicuous), 2+2 lateral mac on Abd. III, 6+6 central and 8+8 lateral mac on Abd. IV. It is also the only species having ms on Abd. III among Chinese cave Coecobrya species. It is closest to C. oculata sp. nov. from which it differs in anophthalmy, smooth clypeal chaetae, chaetae on the ventral side of head, “smooth” inner differentiated tibiotarsal chaetae, ventral tube and dorsal chaetotaxy (Table 1).
description: Published as part of Zhang, Feng, Bedos, Anne & Deharveng, Louis, 2016, Cave-dwelling Coecobrya from southern China with a survey of clypeal chaetae in Entomobryoidea (Collembola), pp. 1-21 in European Journal of Taxonomy 226 on pages 8-10, DOI: 10.5852/ejt.2016.226, http://zenodo.org/record/3840350