Homidia changensis, Jing & Ma, 2022

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

publication ID	https://dx.doi.org/10.3897/zookeys.1135.89373
publication LSID	lsid:zoobank.org:pub:18798B62-4F1F-4026-91F1-D773E0176082
persistent identifier	https://treatment.plazi.org/id/7A88BCD3-07D5-40B4-8E44-BE1F21AD6FC8
taxon LSID	lsid:zoobank.org:act:7A88BCD3-07D5-40B4-8E44-BE1F21AD6FC8
treatment provided by	ZooKeys by Pensoft
scientific name	Homidia changensis
status	sp. nov.

Treatment

Homidia changensis sp. nov.

Figs 41-42 View Figures 41, 42 , 43-49 View Figures 43–49 , 50-55 View Figures 50–55 , 56 View Figure 56 , 57 View Figure 57 , 58-64 View Figures 58–64

Type material.

Holotype. 1♀ on slide, China, Jiangxi Province, Nanchang City, Xinjian District, Jiuxi, 28°47'56"N, 115°45'11"E, 168 m asl, sample number 1243, collected by Y-T Ma, 12-XI-2020, deposited in NTU. Paratypes. 2♀ on slides, same data as holotype.

Description.

Size. Body length up to 2.33 mm.

Colouration. Ground colour yellow. Ant. II-IV and distal part of Ant. I brown. Eye patches dark blue. Coxae, tibiotarsi, posterior part of Abd. IV and Abd. V with scattered brown pigment (Figs 41 View Figures 41, 42 , 42 View Figures 41, 42 ).

Head. Antenna 0.50-0.57 × body length; antennal segment ratio I: II: III: IV = 1: 1.33-1.50: 1.17-1.30: 1.90-2.00. Apical bulb of Ant. IV bilobed (Fig. 43 View Figures 43–49 ). Ant. III organ with two rod-like chaetae (Fig. 44 View Figures 43–49 ). Ant. II with four distal rod-like chaetae (Fig. 45 View Figures 43–49 ). Eyes 8 + 8, G and H smaller than others; interocular chaetae with p, r, and t. Dorsal cephalic chaetotaxy with three antennal (A), three ocellar (O) and five sutural (S) mac (Fig. 46 View Figures 43–49 ). Basal chaeta of maxillary outer lobe thin, subequal to apical one; sublobal plate with three smooth chaeta-like processes (Fig. 47 View Figures 43–49 ). Lateral process (l.p.) of labial papilla E differentiated, as thick as normal chaeta, with tip almost reaching apex of papilla E (Fig. 48 View Figures 43–49 ). Chaetal formula of labial base as M1M2ReL1L2, chaeta e smooth, others ciliate, R/M1 as 0.63-0.70 (Fig. 49 View Figures 43–49 ).

Thorax. Th. II with four medio-medial (m1, m2, m2i, m2i2), three medio-sublateral (m4, m4i, m4p), 32-38 posterior mac, one ms and two sens (ms antero-internal to sens). Th. III with 38-47 mac and two sens (Fig. 50 View Figures 50–55 ). Pseudopores on coxa I-III as 2, 3, 2, respectively; coxal macrochaetal formula as 3/4+3(4), 3/4+2 (Figs 51-53 View Figures 50–55 ). Trochanteral organ with 45-48 smooth chaetae (Fig. 54 View Figures 50–55 ). Tenent hairs clavate and almost equal to inner edge of unguis. Unguis with four inner teeth, basal pair located at 0.31-0.41 distance from base of inner edge of unguis, distal unpaired teeth at 0.63-0.71 and 0.83-0.84 distance from base; unguiculus lanceolate, outer edge slightly serrate (Fig. 55 View Figures 50–55 ).

Abdomen. Range of Abd. IV length as 6.03-10.40 × as dorsal axial length of Abd. III. Abd. I with 11 (a1a, a1-3, a5, m2-4, m2i, m4i, m4p) mac, 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. 56 View Figure 56 ). Abd. IV with two normal sens; anteriorly with six or seven mac arranged in irregular transverse row, posteriorly with 5-7 (A4, A6, B4-6, A5 and Ae7 sometimes present) central mac, laterally with 20-22 mac (Fig. 57 View Figure 57 ). Abd. V with three sens, middle one posterior to m3 (Fig. 58 View Figures 58–64 ). Anterior face of ventral tube with 24-27 ciliate chaetae, 3+3 of them as mac, line connecting proximal (Pr) and external-distal (Ed) mac oblique to median furrow (Fig. 59 View Figures 58–64 ); posterior face with two or four distal smooth and numerous ciliate chaetae; lateral flap with six smooth and 14-16 ciliate chaetae (Fig. 60 View Figures 58–64 ). Manubrial plaque dorsally with 11 or 12 ciliate chaetae and 2-4 pseudopores (Fig. 61 View Figures 58–64 ); ventrally with 25-28 ciliate chaetae on each side (Fig. 62 View Figures 58–64 ). Dens with 16-28 smooth inner spines (Fig. 63 View Figures 58–64 ). Mucro bidentate with subapical tooth larger than apical one; tip of basal spine reaching apex of subapical tooth; distal smooth section of dens shorter than mucro in length (Fig. 64 View Figures 58–64 ).

Ecology.

In the leaves litter of Phyllostachys edulis .

Etymology.

Named after its locality: Nanchang City, which is abbreviated as Chang.

Remarks.

The new species is characterised by its colour pattern and coxal macrochaetotaxy, and can be easily distinguished from all known species of Homidia . It is similar to the Chinese species H. huashanensis Jia, Chen & Christiansen, 2005, H. jordanai Pan, Shi & Zhang, 2011, and H. unichaeta Pan, Shi & Zhang, 2010 and the Korean species H. koreana Lee & Lee, 1981 in colour pattern, but significant differences exist between these species, such as chaetotaxy on Abd. I and IV and number of dental spines (Table 3 View Table 3 ).