Homidia longiantenna, Zhou & Huang & Ma, 2024

Zhou, Rong, Huang, Ling & Ma, Yi-Tong, 2024, Smooth post-labial chaetae in Homidia (Collembola, Entomobryidae) and the description of four new species from China with the aid of DNA barcoding, ZooKeys 1213, pp. 41-73 : 41-73

publication ID	https://doi.org/ 10.3897/zookeys.1213.123839
publication LSID	lsid:zoobank.org:pub:5ABCB962-61FB-4CBC-906B-99B14014637E
DOI	https://doi.org/10.5281/zenodo.13839992
persistent identifier	https://treatment.plazi.org/id/67A3996A-CCA2-42CC-BD48-3C878435D11F
taxon LSID	lsid:zoobank.org:act:67A3996A-CCA2-42CC-BD48-3C878435D11F
treatment provided by	ZooKeys by Pensoft
scientific name	Homidia longiantenna
status	sp. nov.

Treatment

Homidia longiantenna sp. nov.

Figs 1 View Figure 1 , 2-8 View Figures 2–8 , 9-11 View Figures 9–11 , 12-17 View Figures 12–17 , 18 View Figure 18 , 19 View Figure 19 , 20–27 View Figures 20–27 , Tables 2 View Table 2 , 3 View Table 3

Type material.

Holotype • ♀ on slide, China, Guangxi Zhuang Autonomous Region, Guilin City, Longsheng Autonomous County, Huaping Natural Reserve , Tianping Mountain , 31 - V- 2023, 25 ° 37 ′ 52 ″ N, 109 ° 54 ′ 47 ″ E, 935.4 m asl, sample number 1281 GoogleMaps . Paratype • ♀ on slide, same data as holotype. All collected by Y-T Ma GoogleMaps .

Description.

Size. Body length up to 3.02 mm.

Coloration. Ground colour pale yellow; eye patches dark blue; scattered brown pigment present on body, especially tibiotarsus, lateral and posterior parts of Abd. IV, sometimes Ant. III – IV and Abd. II – III also with brown pigment (Fig. 1 View Figure 1 ).

Head. Antenna not annulated and 0.98–1.07 times length of body. Ratio of Ant. I – IV as 1.00 / 1.24–1.50 / 1.06 – 1.30 / 2.06 – 2.60. Distal part of Ant. IV with many sensory chaetae and normal ciliate chaetae, apical bulb bilobed (Fig. 2 View Figures 2–8 ). Sensory organ of Ant. III with two rod-like chaetae (Fig. 3 View Figures 2–8 ). Sensory organ of Ant. II with 3 (4) rod-like chaetae (Fig. 4 View Figures 2–8 ). Eyes 8 + 8, G and H smaller than others, interocular chaetae as p, r, t mes. Dorsal chaetotaxy of head with four antennal (An), five median (M) and eight sutural (S) mac (Fig. 5 View Figures 2–8 ). Prelabral and labral chaetae as 4 / 5, 5, 4, all smooth, a 0, a 1 longer than a 2; labral papillae absent (Fig. 6 View Figures 2–8 ). Basal chaeta on maxillary outer lobe almost as thick as apical one; sublobal plate with three smooth chaetae-like processes (Fig. 7 View Figures 2–8 ). Lateral process (l. p.) of labial palp E differentiated, as thick as normal chaeta, with tip almost reaching apex of papilla E (Fig. 8 View Figures 2–8 ). Labial base with MM 1 R 1 ReL 1 L 2, chaeta e smooth and other ciliate, R 1 sometimes absent, R 0.60–0.73 length of M; anterior post-labial chaetae slightly expanded (Figs 9–11 View Figures 9–11 ).

Thorax. Tergal ms formula on Th. II – Abd. V as 1, 0 / 1, 0, 1, 0, 0, sens as 2, 2 / 1, 2, 2, 23, 3 (Figs 12 View Figures 12–17 , 18 View Figure 18 – 20 View Figures 20–27 ). Th. II with four medio-medial (m 1, m 2, m 2 i, m 2 i 2), three medio-sublateral (m 4, m 4 i, m 4 p), 30–38 posterior mac. Th. III with about 39–41 mac (Fig. 12 View Figures 12–17 ). Coxal macrochaetal formula as 3 / 4 + 1, 3 / 4 + 2 (Figs 13–15 View Figures 12–17 ). Trochanteral organ with 71–76 smooth chaetae (Fig. 16 View Figures 12–17 ). Tenent hair clavate, 0.95–0.98 length of inner edge of unguis; unguis with three inner teeth, basal pair located at 0.38–0.39 distance from base of inner edge of unguis, unpaired tooth at 0.62–0.64 distance from base; unguiculus lanceolate, outer edge slightly serrate (Fig. 17 View Figures 12–17 ).

Abdomen. Range of Abd. IV length as 9.00–9.30 times as dorsal axial length of Abd. III. Abd. I with 11 (a 1 a, a 1–3, m 2 i, m 2–4, m 4 i, m 4 p and a 5) mac. Abd. II with six (a 2, a 3, m 3, m 3 e, m 3 ea, m 3 ep) central, one (m 5) lateral mac. Abd. III with two (a 2, m 3) central, four (am 6, pm 6, m 7 a, p 6) lateral mac (Fig. 18 View Figure 18 ). Abd. IV with two (as, ps) normal sens, 14–20 anterior, 6–7 (A 4–6, B 4–6, Ae 7, A 4 sometimes absent) posterior and 24–26 lateral mac (Fig. 19 View Figure 19 ). Abd. V with three sens (Fig. 20 View Figures 20–27 ). Anterior face of ventral tube not seen entirely, line connecting proximal (Pr) and external-distal (Ed) mac oblique to median furrow (Fig. 21 View Figures 20–27 ); posterior face with five or eight distal smooth and numerous ciliate chaetae (Fig. 22 View Figures 20–27 ); lateral flap with 7–8 smooth and 19–30 ciliate chaetae (Fig. 23 View Figures 20–27 ). Manubrial plate dorsally with 14–15 ciliate mac and 3 (2) pseudopores (Fig. 24 View Figures 20–27 ); ventrally with 33–41 ciliate chaetae on each side (Fig. 25 View Figures 20–27 ). Dens with 54–78 smooth inner spines (Fig. 26 View Figures 20–27 ). 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. 27 View Figures 20–27 ).

Etymology.

Named after its characteristic long antennae.

Ecology.

Found in the leaf litter.

Remarks.

The new species is characterised by the long antennae and the slightly expanded post-labial chaetae, and can be easily distinguished from all known species of Homidia . It is similar to the species H. apigmenta Shi, Pan & Zhang, 2010 , H. pseudofascia Pan, Zhang & Li, 2015 , and H. wanensis Pan & Ma, 2021 in the expanded post-labial chaetae and colour pattern, but can be separated from them by the long antennae and other characters. It is also similar to H. jordanai Pan, Shi & Zhang, 2011 in the long antennae, but significant differences exist between them, such as the post-labial chaetotaxy and central mac on Abd. III and other characters. The detailed character comparisons are listed in Table 2 View Table 2 .