Homidia linhaiensis Shi, Pan & Qi, 2009

Jing, Mei-dong & Ma, Yi-tong, 2022, Two new species and two new records of Homidia (Collembola, Entomobryidae) from China, ZooKeys 1135, pp. 181-212 : 181

Homidia linhaiensis Shi, Pan & Qi, 2009

Figs 65-66 , 67, 68 , 69 , 70-75

Homidia linhaiensis Shi, Pan & Qi, 2009: 63.

Examined specimens.

2♀ on slides, China, Jiangxi Province, Pingxiang City, Luxi Town, Shankouyan Park, 27°36'55"N, 114°01'39"E, 144 m asl, sample number 1231, collected by Y-T Ma, 7-XI-2020, in the rotten leaves of Salix babylonica ; 5♀ on slides, China, Jiangxi Province, Nanchang City, Xinjian District, Shizifeng Park, 28°48'48"N, 115°43'15"E, 193 m asl, sample number 1241, collected by Y-T Ma, 12-XI-2020, in the leaves litter of Phyllostachys edulis ; 2♀ on slides, China, Jiangxi Province, Shangrao City, Yunbifeng Park, 28°27'47"N, 117°58'55"E, 101 m asl, sample number 1246, collected by Y-T Ma, 14-XI-2020, in the leaves litter of Phyllostachys edulis .

Description.

Size. Body length up to 2.00 mm.

Colouration. Ground colour yellow. Ant. III & IV with scattered blue pigment. Eye patches dark blue. Th. III with a pair of dark blue spots and coxae and lateral of Th. II also with blue pigment (Figs 65 , 66 ).

Head. Antenna 0.44-0.59 × body length; antennal segment ratio I: II: III: IV = 1: 1.30-1.47: 1.21-1.33: 2.13-2.51. Eyes 8 + 8, interocular chaetae with p, r, and t. Dorsal cephalic chaetotaxy with three antennal (A), three ocellar (O) and six sutural (S) mac (Fig. 67 ). Chaetal formula of labial base as MRel1L2, chaetae e and l1 smooth, others ciliate, R/M as 0.56.

Thorax. Th. II with four medio-medial (m1, m2, m2i, m2i2), four medio-sublateral (m4, m4i, m4p, m4pi), 33 posterior mac. Th. III with 36-39 mac and two sens (Fig. 68 ).

Abdomen. Range of Abd. IV length as 6.28-9.32 × as dorsal axial length of Abd. III. Abd. I with 10 (a2, a3, a5, m2-5, m2i, m4i, m4p) mac, ms antero-internal to sens. Abd. II with six (a2, a3, m3, m3e, m3ea, m3ep) central, one (m5) lateral mac and two sens. Abd. III with two (a2, m3) central and five (am6, pm6, m7a, p6, p7) lateral mac, one ms and two sens. Abd. IV anteriorly with 9-13 mac arranged in irregular transverse row, A2 always present and anterior to transverse row; posteriorly with 10-16 central mac, laterally with 23-27 mac (Fig. 69 ). Anterior face of ventral tube with 24-28 ciliate chaetae, 3+3 of them as mac, line connecting proximal (Pr) and external-distal (Ed) mac oblique to median furrow (Fig. 70 ); posterior face with four distal smooth and numerous ciliate chaetae (Fig. 71 ). Manubrial plaque dorsally with 14-17 ciliate chaetae and three pseudopores (Fig. 72 ); ventrally with 37 ciliate chaetae on each side (Fig. 73 ). Dens with 12-21 smooth inner spines (Fig. 74 ). Mucro bidentate with subapical tooth larger than apical one; tip of basal spine reaching apex of subapical tooth; distal smooth section of dens almost equal to than mucro in length (Fig. 75 ).

Remarks.

This species was first described from Zhejiang Province by Shi et al. (2009) and can be easily distinguished from other known species of the genus by two small blue spots on Th. III, five mac on Abd. III laterally, presence of A2 on Abd. IV. The characters of our specimens agree well with the original description in chaetotaxy of body, labium, colour pattern, and other characters, but there are five smooth chaetae on posterior face of ventral tube from Zhejiang and four smooth chaetae from that from Jiangxi. In fact, the number of smooth chaetae on posterior face of ventral tube may varies intraspecifically from two to five in some species of the genus. Chaetotaxy of manubrial plaque is added here.

Distribution.

China (Jiangxi, Zhejiang).

Figures

Figure 69. Chaetotaxy of Abd. IV of Homidia linhaiensis. Scale bar: 50 μm.

Figures 65, 66. Habitus of Homidia linhaiensis. Scale bars: 500 μm.

Figures 67, 68. Homidia linhaiensis 67 dorsal chaetotaxy of head 68 chaetotaxy of Th. II-III. Scale bars: 20 μm (67); 50 μm (68).

Figures 70 - 75. Homidia linhaiensis 70 anterior face of ventral tube 71 posterior face of ventral tube 72 manubrial plaque 73 ventro-apical part of manubrium 74 proximal section of dens (circles also representing spines) 75 mucro. Scale bars: 20 μm.