Eudigraphis sinensis Ishii & Liang, 1990

Eudigraphis sinensis Ishii & Liang, 1990 View in CoL

Fig. 3 View Figure 3

Material examined.

China • 3 ♂ 5 ♀; Zhejiang, Hangzhou, West Lake ; 30°24'60"N, 120 ° 13 ' 72 " E; 23 April 2024; Y. D. Wang leg.; GenBank: PQ 142931; CBF CZHZS 1 ; • 4 ♂ 3 ♀; Jiangsu, Nanjing, Zhongshan Mountain National Park ; 32°08'47"N, 118 ° 84 ' 38 " E; 12 April 2024; leg. Y. D. Wang leg.; GenBank: PQ 142932; CBF CZNJS 1 .

Diagnosis.

Anterior margin of the labrum is not granulated and is equipped with 3 + 3 lamellar teeth on the anterior margin. Oval bases of setae on coxa, prefemur, and femur of each leg with some long spines at apex. Antennal article VI with 3 thick basiconic sensilla, 1 setiform sensillum, and 1 conical sensillum; article VII with 2 thick basiconic sensilla, 1 setiform sensillum, and 1 conical sensillum.

Description.

Female. With 13 pairs of legs. Measurements: Body length 2.8 mm, caudal bundle 0.45 mm.

Head (Fig. 3 A View Figure 3 ): Eyes comprising 8 ommatidia. The posterior vertex possesses one pair of tufts each arranged in two rows: each anterior row comprises 12 trichomes, while the posterior row contains 10 (Fig. 3 A View Figure 3 ). The trichomes are depicted in Fig. 3 J View Figure 3 . The trichobothria are equal in size and arranged in an isosceles triangle configuration (Fig. 3 A View Figure 3 ). The gnathochilarium’s lateral palps are twice the length of the medial palp. Lateral palps with 13 sensilla, medial palp with 22 sensilla (Fig. 3 F View Figure 3 ). The anterior margin of the labrum is not granulated and is equipped with 3 + 3 lamellar teeth on the anterior margin. The clypeo-labrum with 6 + 6 setae (Fig. 3 E View Figure 3 ).

Antennae: Long antennae with proportions of antennal articles as depicted in Fig. 3 G View Figure 3 . Antennal article VIII with 4 sensory cones, antennal article VI with 3 thick basiconic sensilla (a, i, and p), 1 setiform sensillum (s) situated between a and i, and 1 conical sensillum (c) behind p (Fig. 3 I View Figure 3 ); article VII with 2 thick basiconic sensilla of a and p, 1 setiform sensillum (s) located between a and p, and 1 conical sensillum (c) behind p (Fig. 3 H View Figure 3 ).

Trunk: Collum with one pair of tufts, each consisting of 35 trichomes, lateral protuberance of collum with 6 trichomes in a row (Fig. 3 B View Figure 3 ). Tergites II, with one pair of tufts each consisting of 45 trichomes (Fig. 3 C View Figure 3 ) connected by a continuous posterior row of trichomes. Tergites III, with one pair of tufts each composed of 40 trichomes (Fig. 3 D View Figure 3 ) and connected by a continuous posterior row of trichomes. Tergites II – X exhibit a consistent pattern of trichome insertions.

Legs (Fig. 3 K View Figure 3 ): Trochanter, post-femur, tibia, and tarsus I lack setae. Prefemur and femur each with 1 seta, coxa I with 1 seta, coxa II with 2 or 3 setae, coxae III – XII with 3 setae, coxa XIII with 1 seta (Fig. 3 L View Figure 3 ), oval bases of setae on coxa, prefemur, and femur of each leg with some long spines at apex. Small setiform hair on tarsus II shorter than telotarsus (Fig. 3 M View Figure 3 ). Telotarsus is composed of an anterior process, with an enlarged base, almost as long as the claw. Lamella process and a posterior process are present (Fig. 3 N View Figure 3 ).

Telson: Dorso-medial trichomes on each side consist of 10 sockets of trichome a 1–10, a single trichome b, and three large protruding base sockets of trichome c 1–3 (Fig. 3 P View Figure 3 ). Two bundles of caudal trichomes are located beneath with a very narrow gap. The telson trichomes are of two types: those with hooks and those without hooks. The hooked trichomes of the caudal bundles most commonly possess 1–5 hooks (Fig. 3 O View Figure 3 ).

Male. With 13 pairs of legs. Measurements: Body length 2.5 mm, caudal bundle 0.4 mm. Lateral palps with 13 sensilla, medial palp with 21 sensilla. The anterior margin of the labrum is not granulated and is armed with 3 + 3 lamellar teeth on the anterior margin. Clypeo-labrum with 6 + 6 setae. Collum each with one pair of tufts consisting of 32 trichomes; tergites II and III with one pair of tufts comprised of 42 or 39 trichomes. Coxa I with 1 seta, coxa II with 2 or 3 setae, coxae III – X with 3 setae, coxae XI – XII with 2 setae, coxa XIII with 1 seta.

Distribution.

China (Zhejiang, Jiangsu).

Remarks.

This species closely resembles Eudigraphis kinutensis Haga, 1950 , but can be easily distinguished from the latter by the presence of 3 + 3 lamellar teeth on the anterior margin of the labrum (2 + 2 in E. kinutensis ).