Microdipoena menglunensis (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

Microdipoena menglunensis (Lin & Li, 2008)

Figs 7 , 8 , 9

Mysmenella menglunensis Lin and Li 2008: 506, fig. 13A-I (♂).

Microdipoena menglunensis Lopardo and Hormiga 2015: 783.

Type material.

Holotype ♂ (IZCAS), China: Yunnan, Mengla, XTBG (21.913°N, 101.267°E; 556 ± 11 m), by pitfall trapping, 18.VII.2007, Guo Zheng leg.; paratypes 1♂ (IZCAS), same site as for preceding, Rubber plantation (21.908°N, 101.266°E; 569 ± 11 m), 21.VII.2007; 1♂, same site as for preceding, Primary tropical seasonal rainforest (21.917°N, 101.275°E; 558 ± 17 m), 22.VII.2007, G. Zheng. Examined.

Other material examined.

3♂ 5♀ (MNHSU), China: Yunnan, Mengla, Menglun, XTBG, Rubber-Tea plantation (about 20 yr.) (22.029°N, 101.522°E; 569 ± 11 m), by pitfall trapping, 16-31.V.2007, G. Zheng leg. ; 3♂ 3♀ (MNHSU), China: Yunnan, Mengla, Menglun, XTBG, Rubber plantation (about 20 yr.) (22.038°N, 101.357°E; 586 ± 9 m), by searching, 4-11.IV.2007, G. Zheng leg.

Diagnosis.

This species is similar to Microdipoena jobi (Kraus, 1967) and Microdipoena samoensis (Marples, 1955), but can be distinguished by the detailed structures of the embolus; this species has a distal lobe on the cymbium apex and has a sclerotized cymbial fold bore a row of ordered setae (Fig. 8A, C-F vs. fig. 132D-F, Lopardo and Hormiga 2015: 675). The female distinguished by the semicircular spermathecae separated by 2.5 times their diameter, near globular in M. jobi and M. samoensis (Fig. 9C, D vs. fig. 129E, F, Lopardo and Hormiga 2015: 672)

Description.

Male. See Fig. 7A-C and Lin and Li (2008): 506.

Palp (Fig. 8A-F ): orange; tibia small, cup-shaped, except for retrolateral region, a row of long setae almost encircling the distal brim (Fig. 8E, F ). Cymbium nearly transparent, with a large cymbial tooth at the ventral median, a distal lobe and a cymbium process on the cymbium apex; the cymbial fold slightly sclerotized, bore a row of ordered setae (Fig. 8A, C-F ). Paracymbium wider, tongue-shaped, with long setae (Fig. 8E ). The bulb is embedded in a translucent membranous tegulum. Embolus very long, coiled into two crossed loops; the apical structure of the embolus considerably complicated (Fig. 8C-F ).

New morphological data.

Female. Measurements: total length 0.81. Prosoma 0.24 long, 0.20 wide, 0.20 high. Abdomen 0.57 long, 0.57 wide, 0.62 high. Clypeus 0.06 high. Sternum 0.18 long, 0.16 wide. Length of legs: I 0.92 (0.30, 0.12, 0.28, 0.12, 0.10); II 0.90 (0.28, 0.12, 0.26, 0.14, 0.10); III 0.70 (0.26, 0.08, 0.16, 0.10, 0.10); IV 0.94 (0.32, 0.12, 0.28, 0.12, 0.10).

Somatic characters (Fig. 7D-F ). Coloration: same as in male. Prosoma: carapace long, nearly pear-shape. Cephalic part lower than in male. Ocular pattern as in male. Chelicerae, endites, labium and sternum as in male. Legs: covered with setae and bristles, a sclerotized subdistal-ventral femoral spot present on surface of legs I and II. Abdomen: same as in male.

Epigyne (Fig. 9A-D ): the structure can be seen through the cuticle (Fig. 9A-D ). Scape long, curved, with narrow folds (Fig. 9B-D ). Spermathecae large, semicircular, separated by 2.5 times their diameter (Fig. 9C, D ). Fertilization ducts short, bending anteriorly, arising from lower edge of spermathecae (Fig. 9C, D ). Copulatory ducts membranous, slightly sclerotized, coiled posterior of spermathecae, connected above the spermathecae (Fig. 9C, D ).

Distribution.

Southwestern China (Yunnan).

Remarks.

The female of M. menglunensis is described for the first time.

Figures

Figure 7. Microdiponea menglunensis A-C male habitus D-F female habitus. A, E dorsal B, F ventral C, D lateral. Abbreviations: FS = femoral spot; MC = Metatarsal clasping spine; TS = tibial spine on male leg I. Scale bars: 0.50 mm.

Figure 8. Microdiponea menglunensis A, E, F male palp B conductor C, D embolus and cymbial terminal A apical B dorsal C, E prolateral D, F retrolateral. Abbreviations: C = conductor; CT = cymbial tooth; Cy = cymbium; CyF = cymbial fold; CyFs = setae on cymbial fold; CyP = cymbial process; DL = distal lobe on cymbium; E = embolus; PC = paracymbium; SD = spermatic duct; Te = tegulum; Ti = palpal tibia. Scale bars: 0.10 mm (A, C-F); 0.05 mm (B).

Figure 9. Microdiponea menglunensis A, B epigyne C, D vulva. A, C ventral B lateral D dorsal. Abbreviations: CD = copulatory duct; FD = fertilization duct; S = spermatheca; Sp = scape. Scale bars: 0.10 mm.