Tomocerus jilinensis, Ma, Yitong, 2011

Ma, Yitong, 2011, A new species of Tomocerus (Collembola: Tomoceridae) from China, Zootaxa 2756, pp. 61-64 : 61-63

Tomocerus jilinensis , sp. nov.

Figs 1 – 13 , Table 1

Type material. Holotype female, CHINA, Jilin, Baihe Town, 8.Viii.2009, collection number 1116. Paratypes: 3 females, same data as holotype; 5 females, CHINA, Jilin, Fusong County, Xianren Bridge, 10.viii. 2009, collection number 1120; 7 females, CHINA, Jilin, Changbaishan Mountain, collection number, 1123. All deposited in School of Life Science, Nantong University, China.

Description. Body length up to 3.0 mm. Ground colour pale yellow; eye patches dark blue; ant. segments III & IV pigmented blue; Ant. I & II pigmented pale blue.

Head: Ant. 0.8 – 1.1 times length of body, 3.6 – 5.8 times length of head. Ratio of Ant. segments I – IV as 1.0/1.3 – 2.3/ 6.3 – 9.1/1.3 – 3.8 ( Fig. 1 ). Head capsule anteriorly with 2+4 macrochaetae, medially with 2+7 macrochaetae, posteriorly with 4+4 macrochaetae; numerous small occipital setae ( Fig. 2 ). Labral setae 4/5, 5, 4, marginally with 4 recurving spinules ( Fig. 3 ).

Macrochaetae and bothriotricha of Th. II – III as shown in Fig. 4 . Anterior part of Th. II with 11 macrochaetae, anterior part of Th. III with 1 macrochaeta, posterior part of Th. II & III with 3 macrochaetae on each segment. Trochanteral organ with 1/1 smooth setae ( Fig. 5 ). Tibiotarsus with numerous pointed smooth setae of different sizes and 4 – 7,5 – 8,7 – 9 blunt spiny setae respectively on ventral side of legs I – III ( Fig. 6 ). Unguis slender, with 5, occasionally with 4 or 6 inner teeth; pseudonychia 0.42 – 0.69 times as long as inner edge of unguis. Unguiculus lanceolate, with 1 inner tooth. Tenent hair strongly developed, 1.1 – 1.3 times length of inner edge of unguis, apex spatulate ( Fig. 7 ).

Character jilinensis n. sp. emeicus vulgaris Arrangement of proximal dental spines two rows one row two rows

Macrochaetae and bothriotricha on Abd. I – V as shown in Fig. 4 . Abd. I, II & IV with 3 macrochaetae, posterior part of Abd. III & IV with 4 and 2 macrochaetae respectively. Ventral tube scaled, anterior face with 35 – 49 smooth setae of different sizes on each side ( Fig. 8 ); posterior face with 71(specimen 1116b) smooth setae ( Fig. 9 ) and lateral flap with 74 (specimen 1123d) smooth setae ( Fig. 10 ). Tenaculum unscaled, corpus with 6 – 17 smooth setae ( Fig. 11 ). Manubrium dorso-laterally with a row of 10 – 13 large setae on each side, all weakly ciliate and strongly tapering near apex; blunt principal setae absent. Dental spine formula 5 – 8/4 – 6, I, 1, I; spines simple, dark brown, finely striate or plicated, proximal spines in two rows ( Fig. 12 ). Mucro elongate; outer dorsal lamella with 3 – 9 intermediate teeth; outer basal tooth with corner toothlet; apical and subapical teeth subequal ( Fig. 13 ).

This species is similar to T. emeicus Liu, 1999 and T. vulgaris Tullberg, 1871 in ungual characteristics and chaetotaxy of the head, but differs from the latter two as shown in Table 1 .

Figures

FIGURES 1 – 8. Tomocerus jilinensis sp. nov. 1, habitus; 2, dorsum of head; 3, labrum; 4, dorsal chaetotaxy of Th. II – Abd. V; 5, trochanteral organ; 6, hind tibiotarsus, showing blunt spiny setae; 7, hind foot complex; 8, ventral tube, anterior face of left half.

FIGURES 9 – 13. Tomocerus jilinensis sp. nov. 9, ventral tube, posterior face; 10, ventral tube, lateral flap; 11, tenaculum; 12, dental spines; 13, mucro.

Tables

TABLE 1. Comparison of T. jilinensis n. sp., T. emeicus and T. vulgaris.

Length ratio of antennae to body	≈1	<1	<1
Ground colour Blunt setae of tibiotarsus	pale yellow 4 – 7, 5 – 8, 7 – 9	pale yellow 5, 5, 5	dark 4, 4, 4 – 5
Shape of dental spines	simple	compound	simple
Distal dental spines	I, 1, I	I, 1, I	I, 2, I