Willowsia tanae Chang 2018, sp. nov.
Creators: name: Chang, Yan
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Collembola
Entomobryomorpha
Entomobryidae
Willowsia
Willowsia tanae

description: Willowsia tanae sp. nov.
urn:lsid:zoobank.org:act:070A4536-56EA-4325-A733-2901AF6512A4
Figs 8 ̅10, Tables 1, 4
Diagnosis
Antennae and legs almost wholly blue pigmented and blue pigment present on most part of dorsum from Th. III to Abd. V; Abd. I with 3 mac; Abd. II with 3 central mac; Abd. III with 3 central and 3 lateral mac; Scales spinulate type and present on Ant. I̅II, dorsal side of head and terga, coxa to tibiotarsus, anterior face of ventral tube and ventral side of manubrium.
Etymology
Named after Ms Hongdan Tan, who collected the specimens.
Material examined
Holotype CHINA: ♀, on slide, Shangkanzhe Village, Laochang Town, Pan County, Guizhou Province, 25°39'34'' N, 104°48'27'' E, 1366 m a.s.l., in litter, 22 Jan. 2016, Hongdan Tan leg. (Collection number 1166, NTU).
Paratypes CHINA: 6 ♀♀, on slide, same data as holotype.
Description
MEASUREMENT. Body length up to 1.5 mm.
COLOUR. Ground colour pale yellow. Eyepatches dark blue. Antennae and legs almost wholly blue pigmented. Lateral side of Th. II and head behind eyepatches with blue pigment. Blue pigment present on most part of dorsum from Th. III to Abd. V (Figs 8A–8C).
HEAD. Antenna 0.3̅0.4 × as long as body. Antennal segments ratio as I: II: III: IV = 1: 1.4̅1.7: 1.4̅1.7: 2.1̅2.9. Distal part of Ant. IV with many sensory chaetae, normal ciliate chaetae and a bilobed apical bulb (Fig. 9A). Dorsal cephalic chaetotaxy with 7̅8 antennal (An), 4 median (M) and 9 sutural (S) mac (Fig. 9B). Interocular chaetae as p, s, t, all finely ciliate (Fig. 9B). Eyes 8+8, G and H smaller (Fig. 9B). Labral chaetae as 4/5, 5, 4, all slender; prelabral chaetae ciliate, other smooth, labral papillae not clearly seen (Fig. 9C). Lateral process of labial palp almost as thick as normal chaetae, with tip not reaching apex of labial papilla (Fig. 9D). Subapical chaeta of maxillary outer lobe equal to apical one, three smooth hairs on sublobal plate (Fig. 9E). Labial triangular chaetae as in Fig. 9F, MREL1L2 all finely ciliate.
THORAX. Dorsal macrochaetae shown as in Fig. 9G. Th. II with 2 (m1, m2) medio-median, 3 (m4, m 4i, m4p) medio-sublateral, 13 posterior mac, 1 ms and 2 sens. Th. III with 9 (10, p1p rarely present) median, 6̅7 (m5, a6, p5, p6, m6, m6e, m 5i sometimes absent) lateral mac and 2 sens. Trochanteral organ with 25̅26 smooth spiny chaetae (Fig. 9H). Unguis with 4 inner teeth, one pair located 0.5̅0.6 from base of inner edge of unguis, distal unpaired two respectively at 0.7 and 0.9 distance from base. Unguiculus acuminate and outer edge serrate. Tenent hair thick with clavate tip, slightly longer than length of inner edge of unguis (Fig. 9I).
ABDOMEN. Abd. IV 2.5̅3.2 × as long as Abd. III along dorsal midline. Dorsal mac shown in Figs 10A –10B. Abd. I with 3 (m2, m3, m4) mac, 1 ms and 1 sens; sens inner to ms. Abd. II with 3 (a2, m3, m3e) central, 1 (m5) lateral mac and 2 sens. Abd. III with 1 (m3) central, 3 (am6, pm6, p6) lateral mac, 1 ms and 2 sens (Fig. 10A). Abd. IV with 7 central (A3, A4, A6, B3, B4, B5, B6) and 11̅13 lateral mac as in Fig. 10B. Ventral tube anteriorly with 16̅18 ciliate chaetae (Fig. 10C), posteriorly with 24 ciliate chaetae and 2 smooth chaetae (Fig. 10D), laterally with 6̅7 ciliate chaetae and 5 smooth chaetae (Fig. 10E). Tenaculum with a striate chaeta (Fig. 10F). Manubrial plaque with 5̅6 ciliate chaetae and 2 pseudopores (Fig. 10G). Dens without spines, uncrenulated dens 1.1̅1.2 times as mucro in length. Mucro bidentate, two teeth subequal and tip of basal spine reaching subapical tooth (Fig. 10H).
SCALES. Hyaline, spinulate type, leaf-like and present on Ant. I̅II, dorsal side of head and terga, coxa to tibiotarsus, anterior face of ventral tube and ventral side of manubrium (Fig. 10I).
Remarks
The new species is most similar to the Chinese species W. variabilis Ma, 2016 in colour pattern and scale type, but Abd. I̅IV with 3, 3, 1 and 7 central mac in the former respectively, but 7̅8, 5, 2, 10̅13 central mac in the latter. It is also similar to the species W. sexachaeta sp. nov. in chaetotaxy, but their colour patterns are different. The differences between the three species are shown in Table 4.
description: Published as part of Chang, Yan, 2018, Three new species of Willowsia (Collembola: Entomobryidae) from Guizhou Province, China, pp. 1-18 in European Journal of Taxonomy 470 on pages 14-17, DOI: 10.5852/ejt.2018.470, http://zenodo.org/record/1492621