Willowsia hainanensis, Zhou & Pan & Ma, 2021

Zhou, Rong, Pan, Zhixiang & Ma, Yitong, 2021, Three new species Willowsia (Collembola: Entomobryidae) from China and notes on W. japonica, Zootaxa 4991 (1), pp. 73-92 : 82-84

publication ID	https://doi.org/ 10.11646/zootaxa.4991.1.3
publication LSID	lsid:zoobank.org:pub:302E6E93-FB9D-4DE3-B5C5-E515D99A281F
DOI	https://doi.org/10.5281/zenodo.5099634
persistent identifier	https://treatment.plazi.org/id/03E9879E-A104-EE1F-FF22-AC7CFEBFF896
treatment provided by	Plazi
scientific name	Willowsia hainanensis
status	sp. nov.

Treatment

Willowsia hainanensis sp. nov.

Figs 50−72 View FIGURES 50−51 View FIGURES 52−61 View FIGURES 62−66 View FIGURES 67−72 , Table 1 View TABLE 1

Types. Holotype: adult female on slide, China, Hainan Province, Wanning City, Shangen Town, Lizhikan Villege , 18°58′8″ N, 110°28′56″ E, 11, March, 2011, collection number: 1123, by Xingna Wang with entomological aspirator GoogleMaps . Paratypes: Three adult females on slides, same data as holotype. All deposited in NTU.

Description. Body length up to 1.85 mm, holotype 1.85 mm. Ground colour pale yellow in alcohol. Eye patches dark blue. A light blue pigment present on Ant. I−IV, lateral of Th. III and Abd. IV, distal part of hind femur and posterior part of Abd. V ( Fig. 50 View FIGURES 50−51 ).

Scales. Scales long basal rib type, present on Ant. I−II, head, terga, legs, ventral side of manubrium ( Figs 51 View FIGURES 50−51 & 52 View FIGURES 52−61 ).

Head. Antennae 0.38−0.43 times as long as body. Antennal segments ratio as I: II: III: IV = 1: 2.13−2.43: 1.63−2.00: 2.25−2.50. Distal part of Ant. IV with many smooth sensory chaetae, normal ciliate chaetae and a bilobed apical bulb ( Fig. 53 View FIGURES 52−61 ). Sensory organ of Ant. III as 2 rods ( Fig. 54 View FIGURES 52−61 ). Sensory organ of Ant. II as 1 rods ( Fig. 55 View FIGURES 52−61 ). Dorsal cephalic chaetotaxy as 4 antennal (An), 3 median (M) and 5 sutural (S) mac. Ps2 absent. Interocular mes as p, q, r, s, t. Eyes 8+8, G and H smaller ( Figs 56 & 57 View FIGURES 52−61 ). Labral setae as 4/5, 5, 4, all slender; prelabral chaetae ciliate, other smooth, labral papillae not clearly seen, maybe each papilla with one minute denticle ( Fig. 58 View FIGURES 52−61 ). Lateral process of labial palp slightly curved, with tip almost reaching apex of labial papilla ( Fig. 59 View FIGURES 52−61 ). Subapical chaeta of maxillary outer lobe thin, subequal to apical one; 3 smooth hairs on sublobal plate ( Fig. 60 View FIGURES 52−61 ). Labial triangular chaetae as MREL 1 L 2, all ciliate and R 0.46−0.52 length of M ( Fig. 61 View FIGURES 52−61 ).

Thorax. Th. II with 3 (m4, a5, m5) mac on T2 area, 4 posterior mac, 2 sens on each side. Th. III with 9 (m5 rarely absent) mac, 2 sens on each side ( Fig. 62 View FIGURES 62−66 ). Trochanteral organ with 39−40 smooth spiny chaetae ( Fig. 63 View FIGURES 62−66 ). Unguis with 4 inner teeth, one pair located 0.41−0.44 from base of inner edge of unguis, distal unpaired two respectively at 0.68−0.74 and 0.90−0.92 distance from base. Unguiculus acuminate and outer edge serrate. Tenent hair thick with clavate tip, longer than inner side of unguis ( Fig. 64 View FIGURES 62−66 ).

Abdomen. Abd. IV 3.38−3.88 times as long as Abd. III along dorsal midline. Abd. I with 2 (m3, m4) mac, 1 ms and 1 sens, ms inner to sens. Abd. II with 1 (a2) mac on A1 area, 2 (m3, m3e) mac on A2 area, 1 (m5) lateral mac and 2 sens. Abd. III with 1−2 (a2, a3 sometimes present) mac on A4 area, 1 (m3) mac on A5 area, 3 (am6, pm6, p6) lateral mac, 1 ms and 2 sens. Abd. IV with 7 central and 15−17 lateral mac. Accessory mic of bothriotrichal complexes of Abd. II−IV unmodified ( Figs 65−66 View FIGURES 62−66 ). Ventral tube anteriorly with 12 ciliate chaetae on each side, 3 of them much larger than others ( Fig. 67 View FIGURES 67−72 ), posteriorly with 2 apical smooth chaetae and 8 ciliate chaetae of different sizes ( Fig. 68 View FIGURES 67−72 ), laterally with 4−5 smooth and 4−7 ciliate chaetae ( Fig. 69 View FIGURES 67−72 ). Manubrial plaque dorsally with 4 ciliate chaetae and 2 pseudopores ( Fig. 70 View FIGURES 67−72 ), ventrally with 10−11 ciliate chaetae on each side ( Fig. 71 View FIGURES 67−72 ). Uncrenulated dens 1.32−1.38 times as mucro in length. Mucro bidentate, two teeth subequal and tip of basal spine reaching subapical tooth ( Fig. 72 View FIGURES 67−72 ).

Ecology. In rotten straw of rice.

Etymology. Named after its locality: Hainan Province.

Remarks. The new species is more similar to another Chinese species,

W. guangdongensis Zhang, Xu & Chen, 2007 in sculpture of scale, few body mac, but it can be distinguished from the latter by colour pattern, chaetotaxy on Th. II, prelabral chaetae and other characters. It is somewhat similar to W. nigromaculata ( Lubbock, 1873) in sculpture of scale, but their colour pattern and chaetotaxy are different ( Table 1 View TABLE 1 ).