Homidia pseudofascia, Pan, Zhi-Xiang, Zhang, Feng & Li, You-Bang, 2015

Pan, Zhi-Xiang, Zhang, Feng & Li, You-Bang, 2015, Two closely related Homidia species (Entomobryidae, Collembola) revealed by morphological and molecular evidence, Zootaxa 3918 (2), pp. 285-294 : 286-287

publication ID

https://doi.org/ 10.11646/zootaxa.3918.2.9

publication LSID

lsid:zoobank.org:pub:61608B31-413E-4203-A3DB-1697281E0F47

DOI

https://doi.org/10.5281/zenodo.5685276

persistent identifier

https://treatment.plazi.org/id/0391878E-FFA2-DB73-87B8-F9D232D749DB

treatment provided by

Plazi

scientific name

Homidia pseudofascia
status

sp. nov.

Homidia pseudofascia sp. nov.

Figs 1–20 View FIGURES 1 – 4. H View FIGURES 5 – 12. H View FIGURES 13 – 17. H View FIGURES 18 – 20. H Tab. 1 View TABLE 1

Type material. Holotype female on slide, Wuxi City, Yuantouzhu Park, Jiangsu Province, P. R. China, 31°31′08.92"N, 120°11′17.60"E, altitude 19± 3 m, sample number S4407, collected by Zhi-Xiang Pan, Yu-Han Pan, Chen-Chong Si and Qu-Ping Ren, 17.VII.2013. Paratypes: 4 females on slides and 3 in ethanol, same data as holotype. All types deposited in TZU except 1 paratype in NJAU.

Etymology. Named after the similarity between new species and H. fascia.

Description. Body length up to 2.74 mm.

Colour pattern. Ground colour pale white in ethanol. Eye patches dark blue and a transverse band between patches. Lateral head with a paired dark spots behind eye patches. Antennae gradually darker from Ant. I to Ant. IV. Thorax with lateral strips. A pair of separate narrow strips present on central Th. II. A median and a posterior pairs of transverse narrow but unconnected bands on Abd. IV with a pair of small spots between them. A pair of spots on lateral Abd. V. Coxa, apex of femur and tibiotarsus dirty ( Figs 1–3 View FIGURES 1 – 4. H ). Juveniles with similar but lighter coloration ( Fig. 4 View FIGURES 1 – 4. H ).

Head. Eyes 8+8, G and H smaller than others and always difficult to observe under light microscope; eye patch with 3 chaetae ( Fig. 5 View FIGURES 5 – 12. H ). Antennal length 1.54–2.24 times as cephalic diagonal in axial direction; antennal segments ratio as I: II: III: IV = 1: 1.55–2.41: 1.54–2.31: 2.26–3.96. Ant. II with 5 basal smooth mic ( Fig. 6 View FIGURES 5 – 12. H ), 3–5 (3 longer and 0–2 shorter) distal rod-like S-chaetae. Ant. III organ with 2 rod-like and 3 short guard S-chaetae ( Fig. 7 View FIGURES 5 – 12. H ). Apical bulb of Ant. IV bilobed ( Fig. 8 View FIGURES 5 – 12. H ). Dorsal cephalic chaetotaxy with 3 antennal (A), 3 ocellar ( O) and 5 sutural (S) mac ( Fig. 5 View FIGURES 5 – 12. H ). Prelabral and labral chaetae as 4/5, 5, 4, all smooth; labral papillae absent ( Fig. 9 View FIGURES 5 – 12. H ). Maxillary outer lobe with 1 apical, 1 subapical chaetae and 3 sublobal hairs on sublobal plate, subapical chaeta slightly larger than apical one ( Fig. 10 View FIGURES 5 – 12. H ). Chaetal formula of labial base as M1M2ReL1L2, e smooth and others ciliate; some chaetae posterior to labium slightly expanded ( Fig. 11 View FIGURES 5 – 12. H ). Five papillae A–E on labial palp with 0, 5, 0, 4, 4 guard chaetae, respectively. Lateral process (l.p.) thin with tip exceeding apex of papilla E ( Fig. 12 View FIGURES 5 – 12. H ). Mandible with 4/5 (left/right side) teeth.

Thorax. Complete body sens as 22/122(≥43)3, ms as 10/10100. Th. II with 4 (m1, m2, m 2i and m 2i 2) mediomedial, 3 (m4, m 4i and m4p) medio-sublateral and 3 S-chaetae (ms anterior to sens); posterior with about 30 mac; p4, p 4i, p 4i 2 and p5 as mac, p6 as mic. Th. III with about 35 mac and 2 sens; p5 and p6 as mac ( Fig. 13 View FIGURES 13 – 17. H ). Coxal macrochaetal formula as 3 (3 pseudopores)/4+1, 3 (2 pseudopores)/4+2 (pseudopores unclear). Trochanteral organ with 40–45 smooth chaetae ( Fig. 14 View FIGURES 13 – 17. H ). Tenent hair clavate. Unguis with 4 inner, 2 lateral and 1 outer teeth. Unguiculus lanceolate with outer edge slightly serrate.

Abdomen. Abd. IV length 7–11 times as Abd. III along dorsal medial axis. Abd. I with 11–13 (a1–3, a1a, a5, m2–4, m 2i, m 4i and m4p; a 5i sometimes present, m5 rarely present) mac (ms antero-external to sens). Abd. II with 6 (a2, a3, m3, m3e, m3ea and m3ep) central and 1 (m5) lateral mac. Abd. III with 2 (a2 and m3) central and 4 (am6, pm6, p6 and m7a) lateral mac ( Fig. 15 View FIGURES 13 – 17. H ). Abd. IV with at least 41 elongate and 2 normal length sens; “eyebrow” with 8–11 mac arranged in irregular transverse row; posterior central with 7–9 (A4–6, Ae7, B4–6; Ae5 and Ae6 sometimes present). Abd. V with 3 sens, middle one postero-external to m3; m3a and a 5i as mac ( Fig. 18 View FIGURES 18 – 20. H ). Anterior face of VT with many ciliate chaetae, 4+4 of them as mac, line connecting proximal (Pr) and external-distal (Ed) mac oblique to medial furrow ( Fig. 16 View FIGURES 13 – 17. H ); posterior face with 5 (2+1+2) subapical smooth chaetae; lateral flap with 5 smooth and 13 ciliate chaetae on each side ( Fig. 17 View FIGURES 13 – 17. H ). Manubrial plaque with 3(2) pseudopores (1 specimen with 2 pseudopores) and 11–17 ciliate chaetae ( Fig. 19 View FIGURES 18 – 20. H ). Denes with 36–50 spines; basal chaetae (bs1 and bs2) spiny, bs1 shorter than bs2; chaeta pi unclear. Mucro bidentate with subapical tooth larger than apical one; basal spine short, with tip reaching subapical tooth; distal smooth part of dens shorter than mucro in length ( Fig. 20 View FIGURES 18 – 20. H ). Tenaculum with 4+4 teeth and 1 large, multi-laterally basal ciliate chaeta.

Ecology. Found in bamboo leaf litter.

Remarks. This new species is characterized by colour pattern, labial basal chaeta M duplicated, e smooth and L1 ciliated, 7–9 central mac on posterior Abd. IV. The new species is most similar to H. fascia in dorsal chaetotaxy of the body, chaetae of ventral tube and mucro. However, it can be discriminated from the latter by the colour pattern, labial chaetae, lateral process of labial palp ( Table 1 View TABLE 1 ) and great COI divergence (>18%).

Kingdom

Animalia

Phylum

Arthropoda

Class

Entognatha

Order

Collembola

Family

Entomobryidae

Genus

Homidia

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