Deione cheni, Mi & Li, 2021

Mi, Xiaoqi & Li, Shuqiang, 2021, Nine new species of the spider family Araneidae (Arachnida, Araneae) from Xishuangbanna, Yunnan, China, ZooKeys 1072, pp. 49-81 : 49

Deione cheni sp. nov.

Fig. 8

Type material

. Holotype. ♀ (IZCAS-Ar42537), China: Yunnan, Xishuangbanna, Mengla County, Menglun Town, Menglun Nature Reserve, secondary tropical seasonal moist forest (21°54.72'N, 101°16.94'E, ca 650 m), 16-31.V.2007, G. Zheng leg. Paratypes: 1♀ (IZCAS-Ar42538), Xishuangbanna Tropical Botanical Garden, site 3 around the dump (21°54.34'N, 101°16.79'E, ca 620 m), 2.V.2019, Y. Tong leg.; 2♀ (IZCAS-Ar42539-42540), Xishuangbanna Tropical Botanical Garden, low bamboo plantation (21°53.89'N, 101°16.72'E, ca 570 m), 12.V.2019, Z. Bai leg.

Etymology

. The species is named after Mr. Zhigang Chen, one of the collectors of the type specimens; noun (name) in genitive case.

Diagnosis

. The new species resembles congeneric species in habitus, but it can be distinguished by the: 1) rhomboid epigyne in ventral view; 2) short, ventrally directed scape.

Description

. Female (holotype, Fig. 8 ). Total length 6.30. Carapace 2.50 long, 1.70 wide. Abdomen 4.20 long, 2.50 wide. Clypeus 0.13 high. Eye sizes and interdistances: AME 0.15, ALE 0.10, PME 0.15, PLE 0.10, AME-AME 0.15, AME-ALE 0.53, PME-PME 0.20, PME-PLE 0.58, MOA length 0.43, anterior width 0.35, posterior width 0.45. Leg measurements: I 5.00 (1.50, 1.75, 1.15, 0.60), II 4.95 (1.50, 1.75, 1.15, 0.55), III 3.45 (1.05, 1.25, 0.65, 0.50), IV 4.90 (1.45, 1.80, 1.10, 0.55). Carapace rectangular, dark brown, with dense, pale setae. Chelicerae dark brown, 5 promarginal teeth, 3 retromarginal teeth. Endites dark brown basally, yellow distally, labium triangular, dark brown. Sternum heart-shaped, dark brown. Legs yellow with brown annulations. Abdomen oval, about 1.7 times longer than wide, with two pairs of long setae anteriorly, two pairs of vertically arranged lateral tubercles posteriorly, dorsum yellow with big grayish brown patch, patch with two pairs of constrictions laterally; venter yellow with big grayish black patch medially. Spinnerets grayish yellow, at posterior 1/3 of the abdomen.

Epigyne (Fig. 8A-C ): rhomboid, about 1.8 times wider than long, with very short, ventrally directed scape; copulatory openings arcuate; copulatory ducts shorter than a spermatheca length; spermathecae elliptical, touching each other.

Variation

. Total length: ♀♀ 4.90-6.30.

Distribution

. China (Yunnan).

Figures

Figure 8. Deione cheni sp. nov., holotype A epigyne, ventral view B ibid., posterior view C ibid., anterior view D habitus, dorsal view E ibid., ventral view F ibid., lateral view. Scale bars: 0.1 mm (A-C); 1 mm (D-F)