Sinhomidia bicolor ( Yosii, 1965 ) Zhang, Deharveng, Greenslade & Chen, 2009

Jin, Han, Jia, Shao-Bo, Yan, Hua-Chao & Jordana, Rafael, 2017, A new species of the Chinese endemic genus Sinhomidia (Collembola: Entomobryinae) described and the first description of amale of Sinhomidia bicolor, Zootaxa 4358 (3), pp. 569-576 : 570-572

Sinhomidia bicolor ( Yosii, 1965) Zhang, Deharveng, Greenslade & Chen, 2009

Figs 1–8 , Figs 14–18 , Table 1

Locality. CHINA, Baiyun Mount, Guangdong Province, 171m asl, coordinates 23°10'N, 113°17'E. On litter, leg. Jia, Yan & Jin, September 20, 2016. One male: collection code number CGZ161010504 J. Two females: collection code number CGZ161005507J, CGZ161010503 J. Deposition School of Life Sciences, Liaocheng University.

Description of male. Body length up to 3.3 mm. Ground colour pale yellow in alcohol. Eye patches dark purple. Ant I and II lightly pigmented, Ant III and IV deeply pigmented ( Figs 4, 5 ). Deep purple pigment present dorso-laterally on mesothorax, whole of Abd II and III; Abd IV with scattered pigment on anterior and posteriorlaterally and on posterior side of manubrium ( Fig. 1 ). Hind femur deep purple ( Fig. 7 ). Differences in the distribution of colour of females from the same locality to those in Zhang et al. (2009).

Head. Ant five times as long as cephalic diagonal. Ant I–II with scales ( Figs 2, 3 ).

Thorax. Trochanteral organ with about 38–45 smooth spiny chaetae ( Fig. 14 ). Coxal macrochaetal formula: 3, 3/4+2, 2+2+2 ( Fig. 15 ). Leg covered with scales to femur ( Fig. 7 ), tibiotarsi without scales ( Fig. 8 ).

Abdomen. Dorsal face of manubrium covered with scales ( Fig. 6 ). Basal two thirds of dens with 40–43 spines arranged in one or two rows along inner edge, scales absent. Dental basal chaetae bs1 and bs2 multilaterally ciliate, bs1 much thicker and longer than bs2. A pair of testes on both sides of thorax and abdomen, with medial unpaired duct connecting to genital tract and extending anteriorly to Abd I. Genital tract gradually narrowing from anterior to posterior, following a 360° twist to connect with genital plate ( Fig. 17 ). Genital plate with 15 circinate chaetae around the genital pore.

Chaetotaxy. Dorsal chaetotaxy of head with the absence of An2e compared to females ( Fig. 18 ). Dorsal Th III with about 20 mac. Lateral sensilla probably present in its normal location but not all seen S formula:?2/122, mS formula:?0/101

Body scales. Scales narrow, pointed and fusiform with coarse striations, present on Ant. I–II, head, thorax, basal segments of legs but not on tibiotarsus, abdomen and on the posterior side of the manubrium.

Remarks. Males were not included in previous descriptions of this species so are described here. Our male specimen agrees with the description in female specimens except An chaetal number of head and number of Th III chaetae. The colour differs from the female as there is no colour on Abd IV, only scattered pigment. The females in our sample are similar to that described in Zhang et al. (2009). Only one male has been found, which has some sexual dimorphism compared to females, so could be only an individual variation. This shortened description above emphasises the distinction of male from female.

Figures

FIGURES 1–13. Sinhomidia bicolor male: 1, colour pattern; 2, Ant I with scales; 3, Ant II with scales; 4, Ant III without scales; 5, Ant IV without scales; 6, Manubrium with scales; 7, Hind femur with scales; 8, Tibiotarsi leg 2 without scales. Sinhomidia guangxiensis sp. nov: 9, colour pattern; 10, Ant I without scales; 11, Manubrium without scales; 12, Hind femur without scales; 13, body scales.Bar 1 and 9 = 1 mm; bar 2–8, 10–13 = 0.1 mm.

FIGURES 14–18. Sinhomidia bicolor male: 14, trochanteral organ; 15, coxal chaetotaxy legs 1, 2 and 3; 16, dens and mucro (only the spines are figured, not the chaetae neither their insertions), 17, male genital tract, 18, head chaetotaxy. Bar 14 = 25 µm, Bar 15,18 = 50 µm, Bar 16 and 17 = 0.1mm.