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

http://dx.doi.org/10.11646/zootaxa.3918.2.9

publication LSID

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

persistent identifier

http://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 1–20View FIGURES 1 – 4. HView FIGURES 5 – 12. HView FIGURES 13 – 17. HView FIGURES 18 – 20. H Tab. 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 S 4407, 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 Figure ). Juveniles with similar but lighter coloration ( Fig. 4 View Figure ).

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 Figure ). 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 Figure ), 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 Figure ). Apical bulb of Ant. IV bilobed ( Fig. 8 View Figure ). Dorsal cephalic chaetotaxy with 3 antennal (A), 3 ocellar ( O) and 5 sutural (S) mac ( Fig. 5 View Figure ). Prelabral and labral chaetae as 4 /5, 5, 4, all smooth; labral papillae absent ( Fig. 9 View Figure ). 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 Figure ). Chaetal formula of labial base as M 1 M 2 ReL 1 L 2, e smooth and others ciliate; some chaetae posterior to labium slightly expanded ( Fig. 11 View Figure ). 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 Figure ). 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 (m 1, m 2, m 2 i and m 2 i 2) mediomedial, 3 (m 4, m 4 i and m 4 p) medio-sublateral and 3 S-chaetae (ms anterior to sens); posterior with about 30 mac; p 4, p 4 i, p 4 i 2 and p 5 as mac, p 6 as mic. Th. III with about 35 mac and 2 sens; p 5 and p 6 as mac ( Fig. 13 View Figure ). 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 Figure ). 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 (a 1–3, a 1 a, a 5, m 2–4, m 2 i, m 4 i and m 4 p; a 5 i sometimes present, m 5 rarely present) mac (ms antero-external to sens). Abd. II with 6 (a 2, a 3, m 3, m 3 e, m 3 ea and m 3 ep) central and 1 (m 5) lateral mac. Abd. III with 2 (a 2 and m 3) central and 4 (am 6, pm 6, p 6 and m 7 a) lateral mac ( Fig. 15 View Figure ). 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 (A 4–6, Ae 7, B 4–6; Ae 5 and Ae 6 sometimes present). Abd. V with 3 sens, middle one postero-external to m 3; m 3 a and a 5 i as mac ( Fig. 18 View Figure ). 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 Figure ); 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 Figure ). Manubrial plaque with 3 (2) pseudopores (1 specimen with 2 pseudopores) and 11–17 ciliate chaetae ( Fig. 19 View Figure ). Denes with 36–50 spines; basal chaetae (bs 1 and bs 2) spiny, bs 1 shorter than bs 2; 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 Figure ). 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 L 1 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) and great COIAbout COI divergence (> 18 %).

COI

University of Coimbra Botany Department