Willowsia guangdongensis, Zhang & Chen, 2007

Zhang, Feng & Chen, Guo-Liang Xu Jian-Xiu, 2007, A new species of Willowsia (Collembola: Entomobryidae) from South China, Zootaxa 1645 (1), pp. 63-68 : 64-65

Willowsia guangdongensis sp. nov.

Figs 1–20 , Tab.1

Type material. HOLOTYPE: male, China, Guangdong Province, Heshan, Heshan Hilly Land Interdisciplinary Experimental Station, Chinese Academy of Sciences , 15.ix.2006, collection number C9522, coll. Jian-xiu Chen, Feng Zhang, and Jigang Jiang. PARATYPES: two females and two males, same data as holotype .

Description. Body length: up to 1.86 mm.

Color pattern. Ground color pale yellow in alcohol. Eye patches dark blue. Antennae and each segment gradually darker towards apex, Ant. III and IV dark blue. Transverse dark blue band present just behind antennal bases. Body dorsum with scattered blue pigment present on area anterior to eye patches, along lateral margins from thorax to anterior parts of Abd. III, along posterior margins of Abd. IV and V, and on whole Abd. VI. Abd. III and IV respectively with one pair of pale blue patches on dorso-lateral sides. Each leg with two dark blue bands respectively on apex of femur and mid of tibiotarsus ( Fig. 1 ).

Head. Antenna 1.9-2.3 times as long as cephalic diagonal. Antennal segments ratio as I: II: III: IV = 1: 1.56–1.78: 1.33-1.56: 2.00–2.22. Antennal apical bulb distinct and unilobed ( Fig. 2 ). Sensory organ of Ant. III as two small rods ( Fig. 3 ).

Eyes 8+8, eyes A and B largest and subequal, G and H smallest and subequal. Labral papillae absent. Prelabral and labral setae 4/ 5, 5, 4, all smooth. Outer differentiated seta of labial palp slightly curved, as thick as normal setae, with tip nearly reaching apex of labial papilla ( Fig. 4 ). Subapical seta of maxillary outer lobe large, subequal in length to and slightly thicker than apical one; 3 smooth hairs on sublobal plate ( Fig. 5 ). Labial triangular setae (after Chen & Christiansen 1993) as M 1, r, E, L 1, L 2; all finely ciliate, r 0.5 length of M 1 ( Fig. 6 ). Cephalic dorsal chaetotaxy with four antennal (An), three median (M) and four sutural (S) macrochaetae. Interocular setae (after Mari-Mutt 1986) as pqrst ( Fig. 7 ).

Thorax and legs. Dorsal macrochaetae (after Szeptycki 1979) shown in Fig. 8 . Th. II with three posterior macrochaetae (p1–3) on each side. Th. III with totally 9 macrosetae, four of them (p5, p6, m6 and m6e) on posterior lateral margin.

Figures

FIGURES 1–13. Willowsia guangdongensis, sp. nov.: 1, color pattern; 2, Ant. IV apical bulb; 3, sensory organ of Ant. III; 4, outer labial palp; 5, maxillary outer lobe; 6, labial triangular setae; 7, cephalic dorsal chaetotaxy; 8, body dorsal macrochaetotaxy; 9, trochanteral organ; 10, tibiotarsal inner differentiated setae; 11, hind foot complex; 12, bothriotrichial complex on Abd. II; 13, bothriotrichial complex on Abd. II.

FIGURES 14–20. Willowsia guangdongensis, sp. nov.: 14, bothriotrichial complex on Abd. IV; 15, tenaculum; 16, anterior face of ventral tube and lateral flap; 17, posterior face of ventral tube; 18, dorsal part of manubrium, apical area; 19, mucro; 20, body scale.TABLE 1. Comparison among the Chinese Willowsia species