Coecobrya mulun, Zhang & Qu & Deharveng, 2010

Zhang, Feng, Qu, Ji-Qiang & Deharveng, Louis, 2010, Two syntopic and remarkably similar new species of Sinella and Coecobrya from South China (Collembola, Entomobryidae), Zoosystema 32 (3), pp. 469-477 : 474

publication ID	https://doi.org/ 10.5252/z2010n3a8
persistent identifier	https://treatment.plazi.org/id/C36787F6-FA6D-FFF5-FF6F-FE3EFEDEF919
treatment provided by	Felipe
scientific name	Coecobrya mulun
status	sp. nov.

Treatment

Coecobrya mulun View in CoL n. sp.

( Figs 1C, D View FIG ; 4 View FIG )

TYPE MATERIAL. — China. Guangxi, Huanjiang, Mulun National Reserve, Min Li Forest , sample no. CHIgx05-102, 14.III.2005, Deharveng L. & Bedos A. leg., ♀ holotype on slide. — Paratypes: same data as holotype, 1 ♀ on slide ( NJU) ; 1 ♀ on slide ( MNHN) .

OTHER MATERIAL EXAMINED. — Same data as holotype, except Berlese extraction following sieving (CHIgx05- 109), 1 ♀ ( MNHN) ; 1 specimen with sex not visible on slide ( NJU) .

TYPE LOCALITY. — China, Guangxi, Huanjiang, Mulun National Reserve, Min Li Forest.

ETYMOLOGY. — Named after the type locality.

ECOLOGY. — In leaf litter of broadleaf forest.

DESCRIPTION

Body length up to 1.40 mm.

Body pale violet-bluish; antennae violet-bluish ( Fig. 1C, D View FIG ). Eyes black, subdivided into a large anterior patch (2 eyes) and a small posterior patch (1 eye).

Head: antenna 1.6-1.9 times as long as cephalic diagonal. Ratio of antennal segments I: II: III: IV as 1: 1.5-1.8: 1.3-1.5: 2.3-2.5. Ant. III organ not clearly seen. Ant. IV without apical bulb. Eyes 3+3. Labral papillae absent. Prelabral and labral chaetae 4/5, 5, 4, all smooth. Lateral process of labial palp slightly thicker than normal chaetae, with tip reaching beyond apex of labial papilla ( Fig. 4A View FIG ). Subapical chaeta of maxillary outer lobe large, subequal to apical one; 3 smooth sublobal hairs on maxillary outer lobe ( Fig. 4B View FIG ). Basal chaetae on labium as MREL 1 L 2, all smooth; R 0.4 length of chaeta M; ventral chaeta X behind labium smooth and 0.5 length of chaeta M; chaetae X 2 and X 4 ciliate; chaeta X 3 absent ( Fig. 4C View FIG ). Cephalic dorsal chaetotaxy with 5 sutural macrochaetae (S) and 4 macrochaetae in Gr. II ( Fig. 4D View FIG ).

Thorax: dorsal macrochaetae shown in Figure 4E View FIG . Th. II with 3 (m1, m2, m2i) mediomedial, 3 (m4, m4i, m4p) medio-lateral, 17-20 posterior macrochaetae (with p4, p5 and p4i as macrochaetae) and 3 lateral s-chaetae (the internal one smaller). Th. III with 23 macrochaetae and 2 s-chaetae; p5 as microchaeta and m5i as macrochaeta. Trochanteral organ with 10 or 11 smooth spiny chaetae, 7 or 8 in arms and 2-4 between them ( Fig. 4F View FIG ). Inner differentiated tibiotarsal chaetae ciliate with ciliations not closely appressed to axis; inner outstanding macrochaeta ciliate and tapered, located at about 0.33 distance from base. Unpaired tooth of claw at 65% from inner edge base. Ungual inner basal paired teeth unequal, outer one larger. A pair of small outer basal teeth. Unguiculus with outer edge smooth. Tenent hair on hind leg clavate and others thin and acuminate, subequal to unguiculus in length in the only specimen (holotype) where tenent hairs have been preserved ( Fig. 4G View FIG ).

Abdomen: Abd. IV 3-3.6 times as long as Abd. III along dorsal midline. Abd. I with 5 (m2-4, a3, m4p) central macrochaetae and 2 s-chaetae. Abd. II with 3 (a2, m3, m3e) central, 1 (m5) lateral macrochaetae and 2 s-chaetae. Abd. III with 1 (m3) central, 3 (am6, pm6, p6) lateral macrochaetae and 3 s-chaetae ( Fig. 4H View FIG ). Abd. IV with 3 (A6, B4-5) central, 6 (D3, F1, E2-4, E2p) lateral macrochaetae and about 13 s-chaetae ( Fig. 4I View FIG ). Abd. V with 3 s-chaetae ( Fig. 4J View FIG ). Tenaculum with 4+4 teeth and one large, distally bent, apparently weakly striate chaeta. Ventral tube anteriorly with 5 ciliate chaetae on each side ( Fig. 4K View FIG ); posteriorly with 8 smooth chaetae ( Fig. 4L View FIG ); each lateral flap with 7 smooth chaetae. Manubrium without smooth chaetae. Manubrium plaque with 2+2 pseudopores and 3+3 ciliate chaetae. Distal smooth part of dens 1.5 times length of mucro. Mucro falcate and basal spine long with tip reaching apex of apical tooth ( Fig. 4M View FIG ).

REMARKS

All Coecobrya known so far had 0+0 or 1+1 eyes, except C. tetrophthalma (Denis, 1948) from Vietnam with 2+2 eyes. With 3+3 eyes, C. mulun n. sp. has the highest number of eyes recorded in Coecobrya . Many morphological and chaetotaxic features are shared by C. mulun n. sp. and C. tetrophthalma , but all are also found in various other species of the genus: 3 sublobal hairs on the maxillary outer lobe, 4 dorsal cephalic macrochaetae in Gr. II, similar claw structure (but see below), chaetotaxy of Abd. II, 1+1 central macrochaetae on Abd. III, and 3+3 central macrochaetae on Abd. IV. The two species differ by the number of eyes, pigmented versus unpigmented body, 5 versus 3 sutural chaetae on head and several chaetotaxic characters summarized in Table 1.