Sinella colorata, 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 : 470-471

publication ID	https://doi.org/ 10.5252/z2010n3a8
DOI	https://doi.org/10.5281/zenodo.5177946
persistent identifier	https://treatment.plazi.org/id/C36787F6-FA69-FFF0-FCAE-FC9AFC4AF919
treatment provided by	Felipe
scientific name	Sinella colorata
status	sp. nov.

Treatment

Sinella colorata View in CoL n. sp.

( Figs 1A, B View FIG ; 2 View FIG ; 3 View FIG )

TYPE MATERIAL. — China. Guangxi, Huanjiang, Mulun National Reserve, Min Li forest , litter, Berlese extraction, sample no. CHIgx05-102, 14.III.2005, Deharveng L. & Bedos A. leg., š holotype on slide ( NJU). — Paratypes: same data as holotype, 1 š, 1 specimen with sex not visible (probably ♀) on slide ( NJU) ; 1 š, 1 juvenile, 1 specimen with sex not visible (probably ♀) on slide ( MNHN) .

OTHER MATERIAL EXAMINED. — Same data as holotype, except Berlese extraction following sieving (CHIgx05-109), 1 ♀, 4 specimens with sex not visible on slide ( NJU) ; 1 š, 4 specimens with sex not visible on slide ( MNHN) .

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

ETYMOLOGY. — Named after its well-pigmented body. ECOLOGY. — In leaf litter of broadleaf forest.

DESCRIPTION

Body length up to 1.25 mm.

Body colour stable, pale beige-violet to pale orange, antennae pale violet-bluish ( Fig. 1A, B View FIG ). Eyes black, subdivided into a large anterior patch (2 eyes) and a small posterior patch (1 eye).

Head: antenna about 2 times as long as cephalic diagonal. Ratio of antennal segment I: II: III: IV as 1: 1.8-2.0: 1.5-1.6: 3.1-3.2. Ant. III organ with 2 slightly expanded rods. 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 as thick as normal chaetae, with tip just reaching apex of labial papilla ( Fig. 2A View FIG ). Subapical chaeta of maxillary outer lobe large, slightly larger than apical one; 4 smooth sublobal hairs on maxillary outer lobe ( Fig. 2B View FIG ). Basal chaetae on labium as MREL 1 L 2, all smooth; chaeta R 0.5 length of chaeta M. Ventral chaeta X behind labium smooth, X 4 ciliate, X 2 and X 3 absent ( Fig. 2C View FIG ). Dorsal cephalic chaetotaxy with 5 sutural macrochaetae (S) and 3 macrochaetae in Gr. II ( Fig. 2D View FIG ).

Thorax: dorsal macrochaetae shown in Figure 2E View FIG . Th. II with 3 (m1, m2, m2i) medio-medial, 3 (m4, m4p, m4i)medio-lateral,14-16 posterior macrochaetae (with p4 and p5 as macrochaetae,p4i often absent) and 3 lateral s-chaetae (the internal one smaller). Th. III with 20-22 macrochaetae and 2 s-chaetae; p5, m6p and a7 as microchaetae.Trochanteral organ with 8-13 smooth spiny chaetae, 6-10 in arms and 2or 3between them ( Fig. 2F View FIG ).Inner differentiated tibiotarsal chaetae ciliate with ciliations not closely appressed to axis; inner outstanding macrochaeta ciliate and tapered at tip, located at about 0.33 distance from base. Unpaired tooth of claw at 45% from inner edge base. Ungual inner basal paired teeth unequal, outer one much larger. A pair of small outer basal teeth. Unguiculus lanceolate with outer edge smooth. Tenent hairs of all tibiotarsi thin and acuminate ( Fig. 2G View FIG ).

Abdomen:Abd.IV 2.8-3.8 times as long as Abd.III along dorsal midline.Abd.I with 5 (m2i, m2-4, 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, 2 (pm6, p6) lateral macrochaetae and 3 s-chaetae; am6 as microchaeta ( Fig.2H View FIG ). Abd.IV with 3 (A6, B4-5) central, 6 (F1, E2-4, E2p, D3) lateral macrochaetae and about 13 s-chaetae ( Fig. 2I View FIG ). Abd.V with about 30 chaetae and 3 s-chaetae; m2, m3 and m5 always much larger than others ( Fig. 3A View FIG ). Tenaculum with 4+4 teeth and one large, distally bent, apparently weakly striate chaeta. Ventral tube anteriorly with 4 ciliate chaetae on each side ( Fig. 3B View FIG ); posteriorly with 6-10 smooth chaetae, always 4 in distal row ( Fig. 3C View FIG ); each lateral flap with 5 smooth chaetae in adults( Fig.3B View FIG ) and often 4 in subadults.Manubrium without smooth chaetae. Manubrial plaque with 2+2 pseudopores and 2+2 ciliate chaetae. Distal smooth part of dens 3 times the length of mucro. Mucro bidentate and basal spine short with tip reaching apex of subapical tooth ( Fig. 3D View FIG ).

REMARKS

Sinella colorata n. sp. is characterized by the presence of 4 smooth sublobal hairs on maxillary outer lobe, 3+3 eyes, ciliate chaeta X 4 behind labium, macrochaetae p4 and p5 on Th. II, macrochaeta m5i on Th. III, microchaeta am6 on Abd.III, and long distal smooth part of dens. The 4 sublobal hairs on maxillary outer lobe are observed in Sinella for the first time, though the character is unknown in many species. Among Sinella with 3+3 eyes, S. colorata n. sp. is closest to the Vietnamese species S. pseudostraminea Stach, 1965 in number of eyes, absence of external tooth on unguiculus, and 1+1 central macrochaetae on Abd.III; it diff ers from the latter in shorter mucronal basal spine, presence of a2 and absence of m3ep on Abd. II, and fewer macrochaetae on Abd. IV ( Table 1). The 3+3 eyed species of the genus Sinella may be separated by the following key.