Mengmena yulin Lin & Li, 2022

Zhang, Qiuqiu, Li, Shuqiang & Lin, Yucheng, 2022, Taxonomic study on Mysmenidae spiders (Mysmenidae, Araneae) from Xishuangbanna of Yunnan, China, ZooKeys 1124, pp. 59-108 : 59

Mengmena yulin Lin & Li sp. nov.

Fig. 6

Material examined.

Holotype ♀ (IZCAS) and paratypes 4♀ (IZCAS), China: Yunnan, Mengla County, Menglun Town , XTBG, the secondary tropical rainforest (22.036°N, 101.389°E; 598 ± 17 m), 9-13.VIII.2006, by pitfall trapping, G. Zheng leg.; 31♀ (NHMSU), same data as holotype, 1-15.VII.2007, by searching, G. Zheng leg.

Etymology.

The specific name derives from the Chinese pinyin for rainforest (yǔ lín), refers to it living in rainforest habitats. The epithet is a noun in apposition.

Diagnosis.

The new species is similar to Mengmena banna sp. nov. but can be distinguished by having a straight and smooth posterior brim formed by the fusion of the copulatory ducts, and the copulatory opening situated above this brim (Fig. 6E, F vs. Fig. 3H, I ).

Description.

Female. Measurement : total length 0.78. Prosoma 0.32 long, 0.29 wide, 0.28 high. Abdomen 0.49 long, 0.48 wide, 0.53 high. Clypeus 0.05 high. Sternum 0.21 long, 0.20 wide. Length of legs [total length (femur, patella, tibia, metatarsus, tarsus)]: I 0.92 (0.30, 0.11 0.19, 0.15, 0.17); II 0.85 (0.28, 0.10, 0.17, 0.13, 0.17); III 0.66 (0.19, 0.09, 0.12, 0.11, 0.15); IV 0.79 (0.25, 0.10, 0.16, 0.12, 0.16).

Somatic characters (Fig. 6A-C ). Coloration: prosoma light-yellow centrally, deep yellow marginally. Ocular base black. Chelicera yellow. Endites, labium and sternum light-yellow. Abdomen grey dorsally, pale yellow ventrally, brown marginally. Legs yellow. Prosoma: carapace pear-shaped. Cephalic part slightly elevated. AME absent, six eyes in two rows, white, with black rings. ALE and PLE contiguous. Sternum scutiform, plump, covered with sparse setae. Legs: covered with setae and bristles, a sclerotized femoral spot present at apical ventral surface of leg I and II. Abdomen: round in dorsum.

Epigyne (Fig. 6D-F ): spermathecae small, ovate, widely separated by at least four times their width (Figs 6E, F ). Fertilization ducts short, derived from inner side of the spermathecae and bent anteriorly to form an arc (Fig. 6F ). Copulatory ducts arising from ventral of spermathecae, both sides of copulatory duct fused at the midline position and forming two symmetrical peak shapes (the anterior brim of the fused copulatory ducts broad arc shape, the posterior brim of the fused copulatory ducts near straight) (Fig. 6E, F ). Copulatory opening inconspicuous, situated above the straight brim (Fig. 6E, F ).

Male. Unknown.

Distribution.

Known only from the type locality.

Figures

Figure 3. Mengmena banna sp. nov. A-C male habitus D-F female habitus G epigyne H, I vulva A, D, I dorsal B, E, G, H ventral C, F lateral. Abbreviations: CD = copulatory duct; CO = copulatory opening; FD = fertilization duct; FS = femoral spot; MC = Metatarsal clasping spine; S = spermatheca. Scale bars: 0.50 mm (A-F); 0.10 mm (G-I).

Figure 6. Mengmena yulin sp. nov. A-C female habitus D epigyne E, F vulva. A, F dorsal B, D, E ventral C lateral. Abbreviations: CD = copulatory duct; FD = fertilization duct; FS = femoral spot; S = spermatheca. Scale bars: 0.50 mm (A-C); 0.10 mm (D-F).