Mysmena dai 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

Mysmena dai Lin & Li sp. nov.

Fig. 30

Type material.

Holotype ♀ (IZCAS), China: Yunnan, Mengla, Menglun, XTBG, primary tropical seasonal rainforest (21.917°N, 101.275°E; 588 ± 17 m), by searching, 19-25.X.2006, G. Zheng leg.

Etymology.

The new species is named after the Dai people, an ethnic minority living in Xishaungbanna of Yunnan Province; noun in apposition.

Diagnosis.

Females of this new species seems most similar to M. leucoplagiata (Simon, 1880) and M. mooatae (Baert, 1988) in the configuration of vulva and the rugose long scape, but can be distinguished by the globular spermathecae and the distal end of the descending fertilization ducts, while twisted, ovoid spermathecae, and ascending fertilization ducts in M. leucoplagiata (Fig. 30F vs. fig. 11 in Kraus, 1967), semicircle spermathecae in M. mooatae (Fig. 30F vs. fig. 24 in Baert, 1988).

Description.

Female (holotype). Measurements: total length 0.56 Prosoma 0.18 long, 0.23 wide, 0.20 high. Abdomen 0.38 long, 0.30 wide, 0.36 high. Clypeus 0.05 high. Sternum 0.17 long, 0.13 wide. Length of legs: I 0.64 (0.16, 0.08, 0.16, 0.12, 0.12); II 0.51 (0.12, 0.10, 0.15, 0.08, 0.06); III 0.35 (0.10, 0.05, 0.10, 0.06, 0.04); IV 0.47 (0.20, 0.05, 0.10, 0.08 0.04).

Somatic characters (Fig. 30A-C ). Coloration: prosoma brown-yellow dorsally, yellow ventrally, ocular base of AER black. Abdomen silver yellow dorsally, yellow ventrally, with “U-shaped” white stripes. Legs brown-yellow. Prosoma: carapace nearly pear-shaped. Eight eyes in two rows, AER and PER straight in dorsal view. Chelicerae, endites as in male, labium triangle, and sternum in the shape of a scutiform, covered with short setae. Legs: covered with setae and bristles. A sclerotized subdistal-ventral femoral spot present at surface of leg I and II. Abdomen: near oval in dorsum, covered with pale short setae.

Epigyne (Fig. 30D-F ): the posterior brim with sparse short setae, internal structures visible via translucent cuticle (Fig. 30D ). Scape long, with narrow folds (Fig. 30E, F ). Spermathecae small, nearly globose, separated by 4 × diameter. Fertilization ducts short, derived from lateral of spermathecae vertical posteriorly, curved to the middle distally. Copulatory ducts membranous, connected to lateral margin of spermathecae, fused at the midline position of lower edge of vulva (Fig. 30E, F ).

Male. Unknown.

Distribution.

Southwestern China (Yunnan).

Remarks.

The vulva configuration of this species similar to type species of this genus ( M. leucoplagiata (Simon, 1880)): the presence of scape, the same deriving of fertilization ducts, and same trajectory and extension of copulatory ducts. Therefore, we propose it as a new species.

Figures

Figure 30. Mysmena dai 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; S = spermatheca; Sp = scape. Scale bars: 0.50 mm (A-C); 0.20 mm (D-F).