Homidia qianensis, Jing & Ma, 2023

Jing, Mei-Dong & Ma, Yi-Tong, 2023, Three new species of Entomobryidae (Collembola, Entomobryoidea) from China, ZooKeys 1167, pp. 293-315 : 293

publication ID	https://dx.doi.org/10.3897/zookeys.1167.104090
publication LSID	lsid:zoobank.org:pub:848C2EA6-2420-46A5-B1D5-EED9B018CDC2
persistent identifier	https://treatment.plazi.org/id/F8D9C9A6-093F-4EF7-A90B-C947430F81DD
taxon LSID	lsid:zoobank.org:act:F8D9C9A6-093F-4EF7-A90B-C947430F81DD
treatment provided by	ZooKeys by Pensoft
scientific name	Homidia qianensis
status	sp. nov.

Treatment

Homidia qianensis sp. nov.

Figs 31-32 View Figures 31, 32 , 33-39 View Figures 33–39 , 40-43 View Figures 40–43 , 44 View Figure 44 , 45, 46 View Figures 45, 46 , 47-53 View Figures 47–53

Type material.

Holotype. ♀ on slide, China, Guizhou Province, Liupanshui City, Pan County, Laochang Town, Shangkanzhe Village, 25°39'34″N, 104°48'28″E, 1677 m asl, sample number 1176, collected by H-D Tan, 6-II-2017, from bamboo litter, deposited in NTU. Paratype. ♀ on slide, same data as holotype.

Description.

Size. Body length up to 2.38 mm.

Coloration. Ground colour pale white or yellow. Ant. I pale yellow and Ant. II-IV blue. Eye patches dark blue and a transverse blue stripe between eye patches. Blue pigment present on dorsal head and Th. II-III laterally, legs, ventral tube and Abd. V. Abd. II-III with an irregular transverse blue stripe, respectively. Abd. IV with an irregular transverse blue stripe medially and a narrow blue stripe posteriorly (Figs 31 View Figures 31, 32 , 32 View Figures 31, 32 ).

Head. Antenna 0.64-0. 69 times body length; antennal segment ratio I: II: III: IV = 1: 1.20-1.27: 1.05-1.09: 1.92-2.27. Apical bulb of Ant. IV bilobed (Fig. 33 View Figures 33–39 ). Ant. III organ with two distal rod-like chaetae ventrally (Fig. 34 View Figures 33–39 ). Ant. II with four distal rod-like chaetae ventrally (Fig. 35 View Figures 33–39 ). Eyes 8 + 8, G and H smaller than others; interocular chaetae with p, r, and t mes. Dorsal cephalic chaetotaxy with four antennal (An1, An2, An3a1, An3), five median (M1, M2, M3i, M3, M4) and nine sutural (S0, S1, S2, S3, S3p, S4, S4i, S5i, S5) mac (Fig. 36 View Figures 33–39 ). Labral chaetae as 4/5, 5, 4, all smooth; labral papillae not seen (Fig. 37 View Figures 33–39 ). Lateral process (l.p.) of labial papilla E differentiated, as thick as normal chaeta, with tip almost reaching apex of papilla E (Fig. 38 View Figures 33–39 ). Chaetal formula of labial base as MReL1L2, chaeta e smooth, others ciliate, R/M as 0.50-0.58 (Fig. 39 View Figures 33–39 ). Basal chaeta of maxillary outer lobe thin, subequal to apical one; sublobal plate with three smooth chaeta-like processes (Fig. 40 View Figures 40–43 ).

Thorax. Th. II with four medio-medial (m1, m2, m2i, m2i2), three medio-sublateral (m4, m4i, m4p), 36-38 posterior mac, one ms and two sens (ms antero-internal to sens). Th. III with 47 mac and two sens (Fig. 41 View Figures 40–43 ). Trochanteral organ with 53 smooth spiny chaetae (Fig. 42 View Figures 40–43 ). Tenent hair capitate and almost subequal to inner edge of unguis in length. Unguis with four inner teeth and distal one very faint, basal pair located at 0.43-0.49 distance from base of inner edge of unguis, distal unpaired teeth at 0.65-0.70 and 0.87 distance from base, respectively; unguiculus lanceolate, outer edge slightly serrate (Fig. 43 View Figures 40–43 ).

Abdomen. Range of Abd. IV length as 6.43-7.50 times as dorsal axial length of Abd. III. Abd. I with 11 (a1a, a1-3, a5, m2-4, m2i, m4i, m4p), ms antero-external 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 four (am6, pm6, m7a, p6) lateral mac, one ms and two sens (Fig. 44 View Figure 44 ). Abd. IV with two normal sens and about half length of elongate sens; anteriorly with 12-13 mac arranged in irregular transverse row, posteriorly with nine central mac (A4-6, B4-6, Ae5-7), laterally with 21-23 mac (Fig. 45 View Figures 45, 46 ). Abd. V with three sens, middle one posterior to m3 (Fig. 46 View Figures 45, 46 ). Anterior face of ventral tube with 30 ciliate chaetae, 3+3 of them as mac, line connecting proximal (Pr) and external-distal (Ed) mac oblique to median furrow (Fig. 47 View Figures 47–53 ); posterior face with numerous ciliate chaetae and six smooth chaetae apically (Fig. 48 View Figures 47–53 ); lateral flap not seen entirely (Fig. 49 View Figures 47–53 ). Manubrial plate dorsally with 13-14 ciliate chaetae and three pseudopores (Fig. 50 View Figures 47–53 ); ventrally with 36-37 ciliate chaetae on each side (Fig. 51 View Figures 47–53 ). Dens with 54-57 smooth inner spines (Fig. 52 View Figures 47–53 ). 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 mucro in length (Fig. 53 View Figures 47–53 ).

Etymology.

Named after its locality: Guizhou Province, which is abbreviated as Qian.

Ecology.

In the leaf litter of bamboo.

Remarks.

The new species is characterised by its colour pattern on the antennae and nine sutural mac on the head. Among 77 known species of the genus, 51 species have eight sutural mac and only nine species have nine sutural mac. There are some significant differences among them, such as colour pattern on the antennae and thorax, mac on Abd. III-IV and other characters, which are listed in Table 2 View Table 2 .