Mysmena arcilonga Lin & Li, 2008

Figs 16, 17, 18

Mysmena arcilongus Lin and Li 2008: 497, fig. 7A-I (♂).

Type material.

Holotype ♂ (IZCAS), China: Yunnan, Mengla, Menglun, XTBG, Rubber plantation (21.908°N, 101.266°E; 569 ± 11 m), by searching, 21.VII.2007, G. Zheng leg. Examined.

Other material examined.

8♂ 25♀ (IZCAS), China: Yunnan, Mengla, Menglun, XTBG, primary tropical seasonal rainforest (21.926°N, 101.406°E; 558 ± 17 m), by searching, 5-12.IX.2006, G. Zheng leg. ; 3♂ 2♀ (NHMSU), China: same site as for preceding (22.136°N, 101.431°E; 790 ± 15 m), by searching, 5-12.I.2007, G. Zheng leg.

Diagnosis.

This species can be distinguished from other congeners except for M. furca, M. luosuo sp. nov., and M. rostella by the presence of modified cheliceral spines on males, a row of cymbial serrula on the cymbium, a long, bow-shaped embolus spans retrolaterally to the entire bulbus, and the partial swollen copulatory ducts larger than the spermathecea (cf. Figs 16C, 17A-D, 18B-C). Its males differed from that of Mysmena furca, M. luosuo sp. nov., and M. rostella by having a long, bow-shaped embolus and a serrated cymbial conductor (CyC, Fig. 17B, C), but short embolus in M. furca (Fig. 23C), twisted embolus and absence of a serrated CyC in M. luosuo sp. nov. (Fig. 25B, E), long hooked embolus and CyC with a distal keel in M. rostella (Fig. 28A, C). Females by the curved, rod-shaped spermathecae and the long fertilization ducts (Fig. 18C), but transverse ovoid spermathecae and short fertilization ducts in M. furca and M. luosuo sp. nov. (Figs 23F, 26C), reniform spermathecae in M. rostella (Fig. 29C).

Description.

Male. See Fig. 16A-D and Lin and Li (2008): 497.

Palp (Fig. 17A-D): Orange, the tibia comparatively small, about one-quarter the volume of the bulb; except for retrolateral region, a row of long setae almost encircled the distal brim of tibia (Fig. 17A-D). Cymbium nearly transparent, the tip specialized as a wide cymbial conductor; a row of cymbial serrula on the cymbium; there is a distal lobe on cymbium and a median keel on the middle of the cymbium (Fig. 17B-D). Paracymbium big, with long setae (Fig. 17B-C). Tegulum translucent membranous, with apical apophysis. Embolus long, with two ends, one end extends to cymbial conductor, the other end extends upon the tegulum (Fig. 17A-D).

New morphological data.

Female. Measurements: total length 0.64 Prosoma 0.25 long, 0.27 wide, 0.16 high. Abdomen 0.39 long, 0.39 wide, 0.32 high. Clypeus 0.05 high. Sternum 0.23 long, 0.18 wide. Length of legs: I 0.70 (0.19, 0.08, 0.16, 0.13, 0.14); II 0.67 (0.13, 0.08, 0.18, 0.14, 0.14); III 0.46 (0.11, 0.07, 0.12, 0.08, 0.08); IV 0.53 (0.16, 0.10, 0.13, 0.08 0.06).

Somatic characters (Fig. 16E-G). Coloration: same as in male. Prosoma: carapace nearly peach-shaped. Ocular region projecting, eight eyes in two rows, ALE and PLE contiguous. Chelicerae, endites and labium as in male, the sternum scutiform, covers with short setae. Legs: covered with setae and bristles, a sclerotized subdistal-ventral femoral spot present at surface of leg I. Abdomen: same as in male.

Epigyne (Fig. 18A-C): the scape short, surface with sparse fold (Fig. 18B). Spermathecae small, irregular (Fig. 18B-C). Fertilization ducts long, derived from anterior border of spermathecae and extended posteriorly. Copulatory ducts long and membranous, the other part slightly sclerotized, extending anteriorly to form an oval (Fig. 18C).

Distribution.

Southwestern China (Yunnan).

Remarks.

The female of M. arcilonga is reported for the first time.