Willowsia baoshanensis, Chai, 2017

Chai, Rui & Ma, Yitong, 2017, Two new species of Willowsia (Collembola: Entomobryidae) from Yunnan Province, China, European Journal of Taxonomy 311, pp. 1-12 : 2-6

Willowsia baoshanensis sp. nov.

urn:lsid:zoobank.org:act:A334FCB0-054E-4527-BC0B-F61A322CD9DC

Figs 1−3 ; Table 1

Diagnosis

Eyepatches and lateral margin of Th. II and III with a little blue pigment; Abd. I with 4+4 mac; Abd. II usually with 4+4 dorso-central mac; Abd. III with 2+2 dorso-central and 3+3 lateral mac; spinulate type scales present on Ant. I, head, terga, legs, ventral tube and ventral side of manubrium.

Etymology

The specific epithet refers to the type locality: Baoshan City.

Type material

Holotype

CHINA: ♀, on slide, collected in Guanjia Village, Xinjie Town, Longyang District , Baoshan City , Yunnan Province, rotten leaves of bamboo, 10 Aug. 2014, Xinnan Jiang leg. (collection number: 1148, Nantong University).

Paratypes

CHINA: 5 ♀♀ on slides, 2 ♀♀ in alcohol, same data as holotype.

Description

COLOUR PATTERN. Body length up to 1.9 mm. Ground color pale yellow. Eyepatch dark blue. Ant. IV and tibiotarsus with blue pigment. Lateral margin of Th. II and III also with a little blue pigment ( Fig. 1 A−C).

HEAD. Antenna 0.43−0.57 times as long as body. Ratios of length of antennal segments I:II:III:IV = 1:1.6−2.0:1.6−2.4:2.5−4.1. Distal part of Ant. IV with many sensory setae, normal ciliate setae and apical bulb bilobed ( Fig. 2A ). Dorsal cephalic chaetotaxy with 6−7 antennal (An), 5 (4) median (M 1 −M 4, an additional seta between M 2 and M 3 rarely absent) and 8 sutural (S 0 −S 5, S 4i, S 5i) mac. Interocular area with p, s, t setae. Eyes 8+8, G and H smaller ( Fig. 2B ). Labral setae as 4/5, 5, 4, all slender; prelabral setae ciliate, other smooth; distal margin of labrum with 4 papillae, each with 1 denticle ( Fig. 2C ). Lateral process of labial palp straight, as thick as normal setae, with tip not reaching apex of labial papilla ( Fig. 2D ). Labial triangle setae as in Fig. 2E , all finely ciliate.

THORAX. Dorsal macrochaetae shown as in Fig. 2F . Th. II with 2 (m1, m2) medio-median, 2 (m4, m4i) medio-lateral and 14−18 posterior mac on each side, 2 specialized setae (S-setae) on antero-lateral margin not clearly seen. Th. III with 13−15 median and 7 (m5, a6, a6i, p5, p6, m6, m6e) lateral mac on each side. Trochanteral organ with 26−30 smooth spiny setae ( Fig. 2G ). Unguis with 4 inner teeth, one pair located 0.38−0.39 from base of inner edge of unguis, distal unpaired two respectively at 0.68−0.71 and 0.84−0.89 distance from base. Unguiculus acuminate and outer edge serrate. Tenent hair thick with clavate tip, almost equal length to inner side of unguis ( Fig. 2H ).

ABDOMEN. Abd. IV 4.2−8.0 times as long as Abd. III along dorsal midline. Dorsal mac shown in Figs 2I and 3A . Abd. I with 4 (m2, m3, m4, m4p) mac. Abd. II with 4 (a2, m3, m3e, m3ep) (rarely 5, a3 present), 1 (m5) lateral mac and 2 S-setae. Abd. III with 2 (a2, m3) dorso-central, 3 (am6, pm6, p6) lateral mac and 3 S-setae ( Fig. 2I ). Abd. IV with 11−18 central (rarely 7, A3, A4, A6, B3, B4, B5, B6 always present) and 15−17 lateral mac as in Fig. 3A . Ventral tube anteriorly with 3 large and about 9 small ciliate setae ( Fig. 3B ), posteriorly with 2 apical smooth setae and about 36 ciliate setae of different sizes ( Fig. 3C ), laterally with 6 smooth and 8 ciliate setae of different sizes ( Fig. 3D ). Manubrial plaque with 8−9 ciliate setae and 3 pseudopores on each side ( Fig. 3E ). Dens without spines, uncrenulated dens 1.5−1.7 times as long as mucro. Mucro bidentate, two teeth subequal and tip of basal spine reaching subapical tooth ( Fig. 3F ).

SCALES. All scales spinulate type and present on Ant. I, head, body, legs and ventral tube, ventral side of manubrium ( Fig. 3G ).

Remarks

The new species can be distinguished from other species of the genus in its color pattern. It is very similar to Chinese species W. guangxiensis Shi & Chen, 2004 and W. shi Pan, Zhang & Chen, 2006 in scales and chaetotaxy on Abd. I, but their color pattern, labial triangle setae, chaetotaxy on Abd. II and III and ungual inner teeth are different as shown in Table 1 .

Figures

Fig. 1. Willowsia baoshanensis sp. nov. A−C. Habitus (A, C = paratypes; B = holotype) Scale bars: 500 μm.

Fig. 2. Willowsia baoshanensis sp. nov. A. Apex of Ant. IV. B. Dorsal chaetotaxy of head. C. Labrum. D. Lateral process of labial palp. E. Labium. F. Chaetotaxy of Th. II−III. G. Trochanteral organ. H. Hind foot complex. I. Chaetotaxy of Abd. I−III. Scale bars: A, C–E, G–H = 15 μm; B, F, I = 50 μm.

Fig. 3. Willowsia baoshanensis sp. nov. A. Chaetotaxy of Abd. IV. B. Anterior face of ventral tube. C. Posterior face of ventral tube. D. Lateral flap of ventral tube. E. Plaque of manubrium. F. Distal part of dens and mucro. G. Scale. Scale bars: A = 50 μm; B–G = 15 μm.