Homidia oligoseta, 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.13839998
persistent identifier	https://treatment.plazi.org/id/F75FD2C9-613D-415C-A090-F9BAC8ED6ECB
taxon LSID	lsid:zoobank.org:act:F75FD2C9-613D-415C-A090-F9BAC8ED6ECB
treatment provided by	ZooKeys by Pensoft
scientific name	Homidia oligoseta
status	sp. nov.

Treatment

Homidia oligoseta sp. nov.

Figs 87–89 View Figures 87–89 , 90-96 View Figures 90–96 , 97, 98 View Figures 97, 98 , 99-106 View Figures 99–106 , 107 View Figure 107 , 108 View Figure 108 , 109–116 View Figures 109–116 , Tables 3 View Table 3 , 4 View Table 4

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 . Paratypes • 2 ♀ on slides, same data as holotype GoogleMaps • 4 ♀ on slides, China, Guangxi Zhuang Autonomous Region, Guilin City, Longsheng Autonomous County, Huaping Natural Reserve , Tianping Mountain , 1 - VI- 2023, 25 ° 38 ′ 01 ″ N, 109 ° 54 ′ 30 ″ E, 707.8 m asl, sample number 1282 GoogleMaps • 7 ♀ on slides, China, Guangxi Zhuang Autonomous Region, Guilin City, Longsheng Autonomous County, Huaping Natural Reserve , Tianping Mountain , Power Station , 2 - VI- 2023, 25 ° 37 ′ 40 ″ N, 109 ° 54 ′ 19 ″ E, 682.0 m asl, sample number 1283. All collected by Y-T Ma GoogleMaps .

Description.

Size. Body length up to 2.21 mm.

Coloration. Ground colour pale white to yellow; eye patches dark blue; brown to blue-violet pigment present on whole dorsal body, antennae, legs, ventral tube, and manubrium; some unpigmented irregular stripes or spots present on dorsal side of body; Th. II often with less brown pigment (Figs 87–89 View Figures 87–89 ).

Head. Antenna not annulated and 0.56–0.62 times length of body. Ratio of Ant. I – IV as 1.00 / 1.25–1.47 / 1.00 – 1.43 / 2.00 – 2.71. Distal part of Ant. IV with many sensory chaetae and normal ciliate chaetae, apical bulb bilobed (Fig. 90 View Figures 90–96 ). Sensory organ of Ant. III with two rod-like chaetae (Fig. 91 View Figures 90–96 ). Sensory organ of Ant. II with 2–3 rod-like chaetae (Fig. 92 View Figures 90–96 ). 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. 93 View Figures 90–96 ). Prelabral and labral chaetae as 4 / 5, 5, 4, all smooth, a 0, a 1 longer than a 2; labral papillae absent (Fig. 94 View Figures 90–96 ). Basal chaeta on maxillary outer lobe slightly thicker than as apical one; sublobal plate with three smooth chaetae-like processes (Fig. 95 View Figures 90–96 ). Lateral process (l. p.) of labial palp E differentiated, as thick as normal chaeta, with tip reaching or exceeding apex of papilla E (Fig. 96 View Figures 90–96 ). Labial base with MRel 1 L 2, chaetae e and l 1 smooth, other ciliate; R 0.53–0.60 length of M. All post-labial chaetae ciliate (Figs 97 View Figures 97, 98 , 98 View Figures 97, 98 ).

Thorax. Tergal ms formula on Th. II – Abd. V as 1, 0 / 1, 0, 1, 0, 0, sens as 2, 2 / 1, 2, 2, 39–55, 3 (Figs 99 View Figures 99–106 , 107 View Figure 107 – 109 View Figures 109–116 ). 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), 32–37 posterior mac. Th. III with 45–50 mac (Fig. 99 View Figures 99–106 ). Coxal macrochaetal formula as 3 (4) / 4 + 1, 3 (4) / 4 + 2 (Figs 100–102 View Figures 99–106 ). Trochanteral organ with 40–57 smooth chaetae (Fig. 103 View Figures 99–106 ). All tenent hairs pointed and 0.60–0.86 length of inner edge of unguis; unguis with three inner teeth, basal pair located at 0.30–0.36 distance from base of inner edge of unguis, unpaired tooth at 0.58–0.71 distance from base; unguiculus lanceolate, outer edge slightly serrate (Figs 104–106 View Figures 99–106 ).

Abdomen. Range of Abd. IV length as 4.75–6.25 times as dorsal axial length of Abd. III. Abd. I with 11 (10) (a 1–3, m 2 i, m 2–4, m 4 i, m 4 p and a 5, a 1 a sometimes absent) 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. 107 View Figure 107 ). Abd. IV with two (as, ps) normal sens, 3–4 (5) anterior, 4 (5) (A 4–6, B 4–5, A 5 rarely present) posterior and 11–17 lateral mac (Fig. 108 View Figure 108 ). Abd. V with three sens (Fig. 109 View Figures 109–116 ). Anterior face of ventral tube with 19–24 ciliate chaetae on each side, line connecting proximal (Pr) and external-distal (Ed) mac oblique to median furrow (Fig. 110 View Figures 109–116 ); posterior face with 5–7 smooth and numerous ciliate chaetae (Fig. 111 View Figures 109–116 ); lateral flap with 6–10 smooth and 7–12 ciliate chaetae (Fig. 112 View Figures 109–116 ). Manubrial plate dorsally with 9–12 ciliate mac and three pseudopores (Fig. 113 View Figures 109–116 ); ventrally with 22–30 ciliate chaetae on each side (Fig. 114 View Figures 109–116 ). Dens with 16–31 smooth inner spines (Fig. 115 View Figures 109–116 ). 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. 116 View Figures 109–116 ).

Etymology.

The name of the new species is derived from the Latin oligo and seta, which means only a few chaetae are present on each side of the anterior part of Abd. IV.

Ecology.

Found in the leaf litter.

Remarks.

The new species is very similar to H. huapingensis sp. nov. and H. acutus Jing & Ma, 2022 in the colour pattern and pointed tenent hair, but can be separated from them by the chaetotaxy of Abd. IV and smooth post-labial chaetae. The detailed character comparisons are listed in Tables 3 View Table 3 , 4 View Table 4 .