Microdipoena shenyang, Zhang & Lin, 2023

Zhang, Qiuqiu & Lin, Yucheng, 2023, Phylogenetic placement of eight poorly known spiders of Microdipoena (Araneae, Mysmenidae), with descriptions of five new species, ZooKeys 1175, pp. 333-373 : 333

Microdipoena shenyang sp. nov.

Figs 15 , 16 , 17

Type material.

Holotype ♀ and paratype 7♂ 1♀ (NHMSU-LN01); 3♂ (NHMSU-No.63); 7♂ 6♀ (NHMSU-No.64) China: Liaoning Province, Shenyang City, Huanggu District, Beiling Forest Park (42°01.503'N, 123°43.823'E; 352 m elev.), 15-25.X.2010, X. Sun leg.

Etymology.

The specific name is derived from the type locality; noun in apposition.

Diagnosis.

Male of this new species differs from other congeners by the embolic end twisted into a complex structure, having a cymbial tooth, which is located on the dorsal edge of cymbium, the peculiar shape conductor with a small membranous process and a large, thickened process on lower sides (cf. Figs 12B, C, F , 16A, B, F , 20C , 22B, D , and Lopardo and Hormiga 2015: fig. 132A-F). Female seems similar to M. jobi and M. lisu sp. nov. in the configuration of vulva and having a long scape with wide at basally and weakly sclerotized at distally, but can be distinguished by the smaller spermathecae spaced by ca 3.5 × their diameter and the more visible fertilization ducts (cf. Figs 17C , 13C , 14F ).

Description.

Male: Total length 1.02. Carapace 0.40 long, 0.48 wide, 0.48 high. Clypeus 0.08 high. Sternum 0.28 long, 0.34 wide. Abdomen 0.62 long, 0.62 wide, 0.70 high. Length of legs: I 1.24 (0.30, 0.12, 0.28, 0.26, 0.28); II 1.14 (0.26, 0.12, 0.26, 0.24, 0.26); III 1.03 (0.26, 0.12, 0.22, 0.19, 0.24); IV 1.06 (0.28, 0.12, 0.20, 0.22, 0.24).

Somatic characters

(Fig. 15A-C ). Coloration: carapace dark brown. Chelicera, endites, labium dark yellow, sternum yellow with two small brown spots. Legs yellow-brown. Abdomen black with symmetrical white spots dorsally and ventrally. Prosoma: carapace nearly round in dorsal view and peak-shaped in lateral view. Cephalic part elevated and flat. Sternum scutiform, plump, covered with sparse setae. Legs: covered with setae. Mating clasper on metatarsus I, two strong spines on tibia I. Abdomen: nearly globose in dorsal view, cover pale setae.

Palp (Fig. 16A-G ): The cymbium long and translucent, covering 3/4 of the bulb horizontally, cymbial tooth on the distal cymbium, the tip specialized as cymbial conductor, and the other tip forming a large cymbial process. Paracymbium large, with long setae. Conductor 7-shaped, sclerotized, with two large apophyses apically and a tooth-shaped apophysis basally. Tegulum translucent, slightly swollen. Embolus filiform, the tip with complex structure, the other structure coiled into two circles. Spermatic ducts can be seen through translucent tegulum.

Female (holotype). Total length 1.25. Carapace 0.42 long, 0.46 wide, 0.42 high. Clypeus 0.08 high. Sternum 0.32 long, 0.28 wide. Abdomen 0.83 long, 0.83 wide, 0.96 high. Length of legs: I 1.20 (0.28, 0.12, 0.24, 0.26, 0.30); II 1.08 (0.26, 0.12, 0.20, 0.24, 0.26); III 1.04 (0.28, 0.12, 0.18, 0.22, 0.24); IV 1.00 (0.28, 0.12, 0.16, 0.20, 0.24).

Somatic characters

(Fig. 15D-F ). Coloration: carapace pale brown. Ocular base black. Chelicera, endites, labium yellow; sternum yellow with two brown stripes. Legs yellow-brown. Abdomen silvery brown with multiple symmetrical yellow spots dorsally, black with multiple arched yellow stripes and spots ventrally. Prosoma: carapace nearly pear-shaped in dorsal view. Cephalic part slightly elevated. Sternum scutiform, slightly plump, covered in sparse setae. Legs: covered with setae and bristles. Femurs I and II with sclerotized femoral spot. Abdomen: nearly globose in dorsal view, covered with pale setae.

Epigyne (Fig. 17A-C ): scape long, with thin folds, tip sclerotized. Copulatory duct short, the sclerotized part coiled in two circles, membranous part coiled under the spermathecae. Paired spermathecae semicircular, separated by 4 × diameter. Fertilization ducts slightly sclerotized, originated from the lower edge of the spermathecae and bent anteriorly.

Distribution.

China (Liaoning)

Figures

Figure 12. Microdipoena jobi Kraus, 1967 from Georgia A bulbus with conductor removed, from behind B cymbium, prolateral C conductor, dorsal D embolic end, retrolateral E male palp, apical F male palp, prolateral G male palp, retrolateral. Abbreviations: CT = cymbial tooth, Cy = cymbium, CyC = cymbial conductor, CyP = cymbial process, E = embolus, Pa = patella, PC = paracymbium, T = tegulum, Ti = tibia. Scale bars: 0.10 mm.

Figure 13. Microdipoena jobi Kraus, 1967 from Georgia A epigyne, ventral B vulva, ventral C vulva, dorsal. Abbreviations: CD = copulatory duct, FD = fertilization duct, S = spermathecal, Sp = Scape. Scale bars: 0.10 mm.

Figure 14. Microdipoena lisu sp. nov., female from Yunnan of China A habitus, dorsal B habitus, ventral C habitus, lateral D epigyne, ventral E vulva, ventral F vulva, dorsal. Abbreviations: CD = copulatory duct, FD = fertilization duct, S = spermathecal, Sp = Scape. Scale bars: 0.50 mm (A-C); 0.10 mm (D-F).

Figure 15. Microdipoena shenyang sp. nov., male (A-C) and female (D-F) from Liaoning of China A habitus, dorsal B habitus, ventral C habitus, lateral D habitus, lateral E habitus, dorsal F habitus, ventral. Abbreviations: FS = femoral spot, TS = tibial spine on male leg I. Scale bars: 0.50 mm.

Figure 16. Microdipoena shenyang sp. nov. from Liaoning of China A conductor, dorsal B cymbium, ventral C bulbus with conductor removed, prolateral D bulbus with conductor removed, retrolateral E embolic end, apical-lateral F male palp, prolateral G male palp retrolateral. Abbreviations: CT = cymbial tooth, Cy = cymbium, CyC = cymbial conductor, CyP = cymbial process, E = embolus, Pa = patella, PC = paracymbium, SD = spermatic duct, T = tegulum, Ti = tibia. Scale bars: 0.10 mm (A, B, E-G); 0.20 mm (C, D).

Figure 17. Microdipoena shenyang sp. nov. from Liaoning of China A epigyne, ventral B vulva, ventral C vulva, dorsal. Abbreviations: CD = copulatory duct, FD = fertilization duct, S = spermathecal, Sp = scape. Scale bars: 0.10 mm.

Figure 20. Microdipoena yinae Lin & Li, 2013, from Sichuan of China A male palp, apical B bulbus with conductor removed, dorsolateral C conductor, dorsal D male palp, prolateral E male palp, retrolateral. Abbreviations: Cy = cymbium, CyC = cymbial conductor, CyP = cymbial process, E = embolus, Pa = patella, PC = paracymbium, SD = spermatic duct, T = tegulum, Ti = tibia. Scale bars: 0.10 mm.

Figure 22. Microdipoena zhulin sp. nov. from Guangxi of China A palp, apical B conductor, dorsal C cymbium, apical D cymbium, prolateral E left tibia I and metatarsus I, prolateral F palp, prolateral G palp, ventral H palp, retrolateral. Abbreviations: CT = cymbial tooth, Cy = cymbium, CyC = cymbial conductor, CyP = cymbial process, E = embolus, MC = mating clasper, Pa = patella, PC = paracymbium, T = tegulum, Ti = tibia, TS = tibial spine. Scale bars: 0.10 mm.