Mysmena rostella Lin & Li, 2008

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 rostella Lin & Li, 2008

Figs 27 , 28 , 29

Mysmena rostella Lin & Li, 2008: 492, fig. 5A-I (♂).

Type material.

Holotype ♂ (IZCAS), China: Yunnan, Mengla, XTBG, secondary tropical montane evergreen broad-leaved forest (21.963°N, 101.200°E; 895 ± 10 m), by searching, 6.VIII.2007, G. Zheng leg. Examined.

Other material examined.

6♂ 6♀ (IZCAS), China: Yunnan, Mengla, Menglun Nature Reserve , secondary tropical montane evergreen broad-leaved forest (21.913°N, 101.191°E; 880 ± 15 m), by pitfall trapping, 16-31.V.2007, G. Zheng leg. ; 2♂ 3♀ (NHMSU), China: same site as for preceding (21.914°N, 101.211°E; 876 ± 15 m), by pitfall trapping, 1-15.IV.2007, G. Zheng leg.

Diagnosis.

Mysmena rostella is similar to M. luosuo sp. nov. in the shape of male palp and the configuration of vulva (cf. Figs 28C, D , 29B, C and Figs 25D, E , 26B, C ), but males can be distinguished by having five pairs of modified spines on the chelicerae, three pairs in M. luosuo (Fig. 27C vs. Fig. 24C ), and by longer embolus extending prolaterally, shorter embolus coils only at the top of bulbus in M. luosuo (Fig. 28A, C vs. Fig. 25A, B, D ). Females distinguished from M. luosuo by the reniform spermathecae, but near globular in M. luosuo (Fig. 29C vs. Fig. 26C ).

Description.

Male. See Fig. 27A-D and Lin and Li (2008): 492, 495.

Palp (Fig. 28A-D ): orange, comparatively large. Except for retrolateral region, a row of long setae almost encircled the distal brim of tibia (Fig. 28A-D ). Cymbium nearly transparent, tip specialized as cymbial conductor, a distal keel on outer wall of cymbium conductor, the cymbial process tip shape, parallel to the cymbial conductor (Fig. 28A-D ). Paracymbium big, with long setae (Fig. 28B ). Bulb ball shape, embedded in a translucent membranous tegulum. Tegulum with apical apophysis. Embolus long and winding, the tip interacts with cymbial conductor. Spermatic ducts can be seen through tegulum (Fig. 28D ).

New morphological data.

Female. Measurements: total length 0.57 Prosoma 0.18 long, 0.21 wide, 0.18 high. Abdomen 0.39 long, 0.38 wide, 0.36 high. Clypeus 0.05 high. Sternum 0.16 long, 0.14 wide. Length of legs: I 0.61 (0.17, 0.07, 0.15, 0.12, 0.10); II 0.52 (0.18, 0.08, 0.12, 0.08, 0.06); III 0.52 (0.16, 0.08, 0.12, 0.07, 0.09); IV 0.50 (0.14, 0.08, 0.12, 0.10 0.06).

Somatic characters (Fig. 27E-G ). Coloration: prosoma brown-yellow, endites brown, labium white, sternum brown with four yellow spots, ocular base black. Abdomen yellow dorsally, brown ventrally, with white and yellow spots. Legs brown-yellow. Prosoma: carapace nearly pear-shaped. The eight eyes in two rows, AER and PER straight in dorsal view. Chelicerae, endites and labium rectangle, and sternum scutiform, covered with short setae. Legs: number of setae and bristles same as in male, a sclerotized subdistal-ventral femoral spot present at surface of leg I and II. Abdomen: as in male.

Epigyne (Fig. 29A-C ): the scape short and thick, and the surface with fine folds (Fig. 29B ). Spermathecae small, nearly semicircle. Fertilization ducts short, derived from lateral of spermathecae, twisted anteriorly and then extended to the anterior of spermathecae. Copulatory ducts slightly sclerotized, coiled around the spermathecae, hooklike symmetrically, connected to the ventral of spermathecae (Fig. 29B, C ).

Distribution.

Southwestern China (Yunnan).

Remarks.

The female description of M. rostella is provided for the first time.

Figures

Figure 24. Mysmena luosuo sp. nov. A, B, D male habitus C male prosoma E-G female habitus A, F dorsal B, G ventral C anterolateral D, E lateral. Abbreviations: CS = cheliceral spines on male; FS = femoral spot; MC = Metatarsal clasping spine. Scale bars: 0.50 mm (A, B, D-G); 0.20 mm (C).

Figure 25. Mysmena luosuo sp. nov. A bulbus B male palp C cymbium D, E male palp A, B apical C retroventral D prolateral E retrolateral. Abbreviations: Cy = cymbium; CyC = cymbial conductor; CyF = cymbial fold; CyFs = setae on cymbial fold; CyP = cymbial process; DL = distal lobe on cymbium; E = embolus; PC = paracymbium; MK = median keel on cymbium; SD = spermatic duct; Te = tegulum; Ti = palpal tibia. Scale bars: 0.10 mm (A-C); 0.20 mm (D, E).

Figure 26. Mysmena luosuo sp. nov. A epigyne B-C vulva A, B ventral C dorsal. Abbreviations: CD = copulatory duct; FD = fertilization duct; S = spermatheca; Sp = scape. Scale bars: 0.20 mm (A); 0.10 mm (B-C).

Figure 27. Mysmena rostella A, B, D male habitus C male prosoma E-G female habitus A, F dorsal B, G ventral C anterolateral D, E lateral. Abbreviations: CS = cheliceral spines on male; FS = femoral spot; MC = Metatarsal clasping spine. Scale bars: 0.50 mm (A, B, D-G); 0.20 mm (C).

Figure 28. Mysmena rostella A-D male palp A dorsal B ventral C prolateral D retrolateral. Abbreviations: AA = apical apophysis on tegulum; Cy = cymbium; CyC = cymbial conductor; CyP = cymbial process; DK = distal keel on cymbium; E = embolus; SD = spermatic duct; Te = tegulum; Ti = palpal tibia. Scale bars: 0.10 mm (A, B); 0.20 mm (C, D).

Figure 29. Mysmena rostella A epigyne B-C vulva A, B ventral C dorsal. Abbreviations: CD = copulatory duct; FD = fertilization duct; S = spermatheca; Sp = scape. Scale bars: 0.10 mm (A-C).