Willowsia Shoebotham 1917
Creators: name: Pan, Zhixiang
name: Zhang, Feng
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Entognatha
Collembola
Entomobryidae
Willowsia

description: Willowsia fascia Zhang & Pan sp. nov.
urn:lsid:zoobank.org:act: C5A9737F-4430-4D9A-89D5-54393C51A795
Figs 1–3; Table 1
Diagnosis
Transverse bands on Abd. II–III; cephalic mac S 0 present; Th. II with 1 (m1) medio-median and 2 (m4, m4i) medio-lateral, and 11 (p1̅5, p1i, p2a, p2p, p2a, p2e, p3p) posterior mac; chaetae a2, a3, p5pi, p6pi on Th. III as mac; Abd. I with 3 (m2̅4) mac; Abd. III with 3 (a2, a3, m3) central mac.
Etymology
Named after the dark bands on the abdomen.
Material examined
Holotype
CHINA: ♀ on slide, Hubei Province, Yingshan County, Taohuachong Forest Park, 30.982° N, 116.020° E, altitude 802 m, 24 Jun. 2014, F. Zhang and D.-Y. Yu leg. (slide # 14HUB64_1, sample # 14 HUB242), deposited in NJAU.
Paratypes
CHINA: 3 ♀♀ and 1 ³ on slides and 2 in alcohol, same data as holotype. One paratype on slide in MNHN (slide # 14HUB64_4) and others in NJAU (slides # 14HUB64_1̅3).
Description
Body length up to 1.70 mm.
Ground colour yellow in alcohol. Ant. I̅IV gradually darker. Transverse bands on Abd. II–III (Fig. 1A). Scales brown, pointed, heavily striate with basal ribs very long (Fig. 1B), and only present dorsally on head and terga. Partial chaetae of the row along the posterior margin of each tergum transformed into scales and larger than other scales.
Based on 6 measured specimens, antenna 2.43–2.53 times as long as cephalic diagonal. Antennal segment ratio as I: II: III: IV = 1: 1.87–2.06: 1.60–1.88: 2.67–2.81. Smooth spiny mic at base of antennae: 3 dorsal and 4 ventral on Ant. I; 1 internal, 1 external and 1 ventral on Ant. II.
Labral intrusion U-shaped. Clypeal chaetae 10 in number, all ciliate and 3 of them smaller (Fig. 2C). Dorsal cephalic chaetotaxy with 4 antennal (An), 4 median (M) and 7 sutural (S) mac; mac S 1 absent; mac S 0 present; interocular chaeta r absent on one side in one specimen. Tip of lateral process of labial palp just reaching or slightly beyond apex of labial papilla. Labial chaeta R/M = 0.55–0.70. Cephalic groove with 6+6(5) ciliate chaetae (Fig. 2F).
Metatrochanteral organ with 8̅13 smooth spine-like chaetae; 6̅ 10 in L-shaped arms and 2̅3 between arms (Fig. 2G). Ungual basal paired inner teeth with tip reaching 50% from base, median one at 74% and distal one at 87%. Tenent hairs slightly longer than unguis in length (Fig. 2H). Abd. IV 2.54–3.95 times as long as Abd. III along dorsal midline. Ventral tube anteriorly not clearly seen; posteriorly with 6–8 chaetae, apical two smooth (Fig. 2I); each lateral flap with 8–12 chaetae and 3–4 of them weakly ciliate (Fig. 2J). Male genital plate papillate, not clearly seen. Manubrium and base of dens dorsally with 6 and 3 large differentiated chaetae, respectively. Manubrial plaque with 2 pseudopores and 4 ciliate chaetae (Fig. 2K). Distal smooth part of dens 1.62̅2.60 times as long as mucro.
Th. II with 1 (m1) medio-medial and 2 (m4, m4i) medio-lateral, and 11 posterior mac; m5 as mac. Th. III with 16 mac; a1 as mic; p5pi and p6pi as mac (Fig. 3A). Abd. I with 3 (m2̅4) mac. Abd. II with 3 (a2, m3, m3e) central and 1 (m5) lateral mac. Abd. III with 3 (a2, a3, m3) central and 3 (am6, pm6, p6) lateral mac. Abd. IV with 7 central and 9 lateral mac; F2 and F3 as mesochaetae (Fig. 3B).
Ecology
In decomposing leaves.
DNA barcode
KU833222.
Remarks
Willowsia fascia sp. nov. is characterized by the two transverse bands on Abd. II–III. The new species is closest to W. similis sp. nov. in the dark Abd. II–III, scale sculpture, clypeal chaetae, labrum, labium, claw, mucro and abdominal chaetotaxy, and differs from the latter in the unpigmented metathorax, mac S 0 present dorsally on the head, and thoracic chaetotaxy (Table 1). The great genetic distance (0.200) of the mitochondrial COI also indicates two independent species.
description: Published as part of Pan, Zhixiang & Zhang, Feng, 2016, Contribution to the Willowsia species having body scales of the long basal rib type: four new species and a redescription of W. qui (Collembola: Entomobryidae), pp. 1-25 in European Journal of Taxonomy 245 on pages 3-7, DOI: 10.5852/ejt.2016.245, http://zenodo.org/record/3850674