Mysmena arcilonga 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

publication ID	https://dx.doi.org/10.3897/zookeys.1124.85952
publication LSID	lsid:zoobank.org:pub:09D04DEB-58C2-4007-AA86-56ACABDE7BE3
persistent identifier	https://treatment.plazi.org/id/7F7C60E9-6D3C-599A-A1FA-BBCC36F757A4
treatment provided by	ZooKeys by Pensoft
scientific name	Mysmena arcilonga Lin & Li, 2008
status

Treatment

Figs 16 View Figure 16 , 17 View Figure 17 , 18 View Figure 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. GoogleMaps ; 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. GoogleMaps

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 View Figure 16 , 17A-D View Figure 17 , 18B-C View Figure 18 ). 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 View Figure 17 ), but short embolus in M. furca (Fig. 23C View Figure 23 ), twisted embolus and absence of a serrated CyC in M. luosuo sp. nov. (Fig. 25B, E View Figure 25 ), long hooked embolus and CyC with a distal keel in M. rostella (Fig. 28A, C View Figure 28 ). Females by the curved, rod-shaped spermathecae and the long fertilization ducts (Fig. 18C View Figure 18 ), but transverse ovoid spermathecae and short fertilization ducts in M. furca and M. luosuo sp. nov. (Figs 23F View Figure 23 , 26C View Figure 26 ), reniform spermathecae in M. rostella (Fig. 29C View Figure 29 ).

Description.

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

Palp (Fig. 17A-D View Figure 17 ): 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 View Figure 17 ). 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 View Figure 17 ). Paracymbium big, with long setae (Fig. 17B-C View Figure 17 ). 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 View Figure 17 ).

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 View Figure 16 ). 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 View Figure 18 ): the scape short, surface with sparse fold (Fig. 18B View Figure 18 ). Spermathecae small, irregular (Fig. 18B-C View Figure 18 ). 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 View Figure 18 ).

Distribution.

Southwestern China (Yunnan).

Remarks.

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