Mengmena 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

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/91BD56B2-545A-4D61-86DF-19D0ED9671BF
taxon LSID	lsid:zoobank.org:act:91BD56B2-545A-4D61-86DF-19D0ED9671BF
treatment provided by	ZooKeys by Pensoft (2022-10-15 21:50:46, last updated 2024-11-27 20:20:12)
scientific name	Mengmena Lin & Li
status	gen. nov.

Treatment

Mengmena Lin & Li gen. nov.

Type species.

Mengmena banna Lin & Li, sp. nov.

Etymology.

The generic name is a combination of the first four letters of Menglun (type locality of type species) and the latter half of Mysmena . The gender is feminine.

Diagnosis.

The Mengmena gen. nov. can be easy distinguished from other mysmenids, except Mysmeniola Thaler, 1995, by lacking anterior median eyes in both sexes (Figs 3A, D View Figure 3 , 6A View Figure 6 ). It resembles Mysmeniola in having six eyes (anterior median eyes absent), a submesial mating clasper on metatarsus I of males, and a long filiform embolus extending to the distal tip of the cymbium, but differs from Mysmeniola in lacking a cluster of strong spines at the base of the male clypeus ( Mysmeniola , Thaler 1995: figs 1, 2), and lacking a prolateral apical process on male palpal tibia ( Thaler 1995: fig. 5). In addition, the male can be distinguished from other mysmenids by the complex structure of the apical part of cymbium (Figs 5A-C View Figure 5 ). The cymbium tip specialized as a triangular cymbial conductor (Figs 4A-B View Figure 4 , 5A-C View Figure 5 ), and the retrolateral base of cymbial conductor present a distal lobe (Figs 4B View Figure 4 , 5A View Figure 5 ), the cymbial fold originated from the base of cymbial conductor and the cymbial fold distal end extended anteriorly form a scleroticed cymbial process (Figs 4D View Figure 4 , 5A-C View Figure 5 ); the absence of cymbial spur (or cymbial tooth) and paracymbium (Figs 4A-D View Figure 4 , 5C View Figure 5 ). The female can be distinguished by the widely separated spermathecae (at least 4 × their width, 2-3 × in other mysmenids), and copulatory opening situated at the union of copulatory ducts (Figs 3H, I View Figure 3 , 6E, F View Figure 6 ).

Description.

Body bicolour, dorsally grey, ventrally yellow or pale yellow (Figs 3A-F View Figure 3 , 6A, B View Figure 6 ). Anterior median eyes absent (Figs 3A View Figure 3 , 3D View Figure 3 , 6A View Figure 6 ). Abdomen without posterior tubercle (Figs 3A-D View Figure 3 , 6A-C View Figure 6 ). Male cephalic area moderately elevated, tibia I without prolateral macrosetae (Fig. 3C View Figure 3 ). Femoral spots present on leg I of the males and legs I-II of the females (Figs 3B View Figure 3 , 3E View Figure 3 , 6B View Figure 6 ).

Male palp: cymbium oriented ventrally on the palp (Fig. 4A, B View Figure 4 ). Cymbial spur and paracymbium absent (Figs 4A-D View Figure 4 , 5C View Figure 5 ). Cymbial process arising from the cymbial fold at apex, strongly sclerotized (Figs 4D View Figure 4 , 5A-C View Figure 5 ). Cymbial conductor wide (Fig. 5A-C View Figure 5 ). Cymbial fold long and sclerotized, from the base of cymbial conductor (Fig. 5C View Figure 5 ). Distal lobe on retrolateral tip of cymbium (Fig. 4A, B View Figure 4 ). Embolus threadlike, coiled with at least two loops (Figs 4A-D View Figure 4 , 5D-E View Figure 5 ).

Epigyne: weakly sclerotized (Figs 3G View Figure 3 , 6D View Figure 6 ). Scape absent (Figs 3G-I View Figure 3 , 6D-F View Figure 6 ). Spermathecae ovate or slightly twisted, separated by at least four times their width. Copulatory ducts wide, shape convoluted. Copulatory opening small hole-shaped or arc shape, situated at the union of copulatory ducts (Figs 3H, I View Figure 3 , 6E, F View Figure 6 ).

Composition.

Mengmena banna sp. nov. and M. yulin sp. nov.

Distribution.

China (Yunnan).

References

Thaler, K, 1995. Mysmeniola spinifera n.gen. n.sp., eine merkwuerdige Kleinspinne aus Venezuela (Arachnida, Araneae: Mysmenidae). Mitteilungen der Schweizerische Entomologische Gesellschaft 68 (3-4): 429 - 433, DOI: https://doi.org/10.5169/seals-402609

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 4. Mengmena banna sp. nov. A-D male pale. A dorsal B ventral C prolateral D retrolateral. Abbreviations: CyC = cymbial conductor; CyP = cymbial process; DL = distal lobe on cymbium; E = embolus; SD = spermatic duct; Te = tegulum; Ti = palpal tibia. Scale bars: 0.20 mm.

Figure 5. Mengmena banna sp. nov. A, B cymbial terminals C palpal cymbium and tibia D, E bulbus. A prodorsal B retroventral C retrodorsal D ventral E dorsal. Abbreviations: Cy = cymbium; CyC = cymbial conductor; CyF = cymbial fold; CyFs = setae on cymbial fold; CyP = cymbial process; DL = distal lobe on cymbium; E = embolus; SD = spermatic duct; Te = tegulum; Ti = palpal tibia. Scale bars: 0.05 mm (A, B); 0.20 mm (C); 0.10 mm (D, E).

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).