Willowsia, Shoebotham, 1917

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), European Journal of Taxonomy 245, pp. 1-25 : 3-7

publication ID	https://doi.org/ 10.5852/ejt.2016.245
publication LSID	lsid:zoobank.org:pub:E42F1AE2-B8E6-43C8-896C-75A87814642A
DOI	https://doi.org/10.5281/zenodo.3854738
persistent identifier	https://treatment.plazi.org/id/03BECF3D-D80C-F86D-D83E-FE22FC2D2FB4
treatment provided by	Valdenar
scientific name	Willowsia
status

Treatment

Willowsia fascia Zhang & Pan sp. nov.

urn:lsid:zoobank.org:act:C5A9737F-4430-4D9A-89D5-54393C51A795

Figs 1–3 View Fig View Fig View Fig ; Table 1 View 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. GoogleMaps

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 View Fig ). Scales brown, pointed, heavily striate with basal ribs very long ( Fig. 1B View Fig ), 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 View Fig ). 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 View Fig ).

Metatrochanteral organ with 8̅13 smooth spine-like chaetae; 6̅ 10 in L-shaped arms and 2̅3 between arms ( Fig. 2G View Fig ). 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 View Fig ). 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 View Fig ); each lateral flap with 8–12 chaetae and 3–4 of them weakly ciliate ( Fig. 2J View Fig ). 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 View Fig ). 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 View Fig ). 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 View Fig ).

Ecology

In decomposing leaves.

DNA barcode

KU833222 View Materials .

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 View Table 1 ). The great genetic distance (0.200) of the mitochondrial COI also indicates two independent species.