Willowsia similis Pan & Zhang 2016, sp. nov.

Willowsia similis sp. nov.

urn:lsid:zoobank.org:act: 427 FEB52 -E400-490E-89C7-72CB02AE9EE6

Figs 10–12; Table 1

Diagnosis

Transverse bands on Th. III and Abd. II–III; cephalic mac S 0 absent; Th. II with 1 (m1) medio-medial and 2 (m4, m 4i) medio-lateral, and 12 (p1̅6, p 1i, p2a, p2p, p2a, p2e, p3p) posterior mac; chaetae a1 and a3 on Th. III as mic; Abd. I with 3 (m2̅4) mac; Abd. III with 3 (a2, a3, m3) central mac.

Etymology

Named after the similarity to Willowsia fascia Zhang & Pan sp. nov.

Material examined

Holotype

CHINA: ♀ on slide, Hunan Province, Changsha City, Yuelu Mountain, 28.195° N, 112.944° E, altitude 159 m, 9 Aug. 2012, Z.X. Pan and Q.P. Ren leg. (slide # 4381_1, sample # 4381), deposited in NJAU.

Paratypes

CHINA: 3 ♀♀ on slides and 3 in alcohol, same data as holotype. One paratype on slide (slide # 4381_4) deposited in MNHN, 3 in alcohol in TZU, and others (4381_2–3) in NJAU

Description

Body length up to 1.83 mm.

Ground colour yellow in alcohol. Ant. I̅IV gradually darker. Transverse bands on Th. III and Abd. II–III (Fig. 10 A–B). Scales brown, pointed, heavily striate with basal ribs very long, 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 (Fig. 10D).

Based on 7 measured specimens, antenna 1.95–2.44 times as long as cephalic diagonal. Antennal segment ratio as I: II: III: IV = 1: 2.07–2.30: 2.07–2.30: 2.45–2.93. Smooth spiny mic at base of antennae: 3 dorsal and 3 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. Dorsal cephalic chaetotaxy with 4 antennal (An), 4 median (M) and 6 sutural (S) mac; mac S 0, S 1 and Ps 2 absent (Fig. 11B). Tip of lateral process of labial palp not reaching apex of labial papilla. Labial chaeta R/M = 0.62–0.71. Cephalic groove with 6+6 ciliate chaetae (Fig. 11C).

Metatrochanteral organ with 10̅17 smooth spine-like chaetae; 8̅ 12 in L-shaped arms and 2̅5 between arms (Fig. 11D). Ungual basal paired inner teeth with tip reaching 51% from base, median one at 73% and distal one at 88%. Tenent hairs subequal to unguis in length (Fig. 11E). Abd. IV 3.21–3.45 times as long as Abd. III along dorsal midline. Ventral tube anteriorly with at least 11+11 ciliate chaetae (Fig. 11F); posteriorly not clearly seen; each lateral flap with about 9 chaetae and 3 of them weakly ciliate. Manubrium and base of dens dorsally with about 12 and 3 large differentiated chaetae, respectively (Fig. 11G); ventrally with 6+6 distal chaetae (Fig. 11H). Manubrial plaque with 2 pseudopores and 4 ciliate chaetae (Fig. 11G). Distal smooth part 1.81 times as long as mucro.

Th. II with 1 (m1) medio-medial, 2 (m4, m4i) medio-lateral, and 12 posterior mac; p6 as mac. Th. III with 14 mac; a1 and a3 as mic (Fig. 12A). 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 10 lateral mac; F2 and F3 as mesochaetae (Fig. 12B).

Ecology

In decomposing leaves of Cinnamomum camphora (L.) Nees & Eberm. in the forest.

DNA barcode

KU833225.

Remarks

Willowsia similis sp. nov. is characterized by the transverse bands on Th. III and Abd. II–III. For more comments, see remarks above on W. fascia Zhang & Pan sp. nov.