Chimena taiwanica (Ono, 2007), 2022

Lin, Yucheng & Li, Shuqiang, 2022, Chimena gen. nov., a new spider genus (Araneae, Mysmenidae) from China, with descriptions of two new species and a new combination, ZooKeys 1125, pp. 69-86 : 69

publication ID	https://dx.doi.org/10.3897/zookeys.1125.85741
publication LSID	lsid:zoobank.org:pub:BC000963-14DB-433C-B517-ED05918968CF
persistent identifier	https://treatment.plazi.org/id/934CD32B-547E-505C-AA77-0DB2EB8D40D9
treatment provided by	ZooKeys by Pensoft (2022-10-20 21:46:21, last updated 2024-11-28 14:28:46)
scientific name	Chimena taiwanica (Ono, 2007)
status	comb. nov.

Treatment

Chimena taiwanica (Ono, 2007) comb. nov.

Figs 5 View Figure 5 , 6 View Figure 6 , 8 View Figure 8

Mysmena taiwanica Ono, in Ono et al. 2006: 73, figs 8-19 (♂♀).

Type material.

Holotype ♂ (FRIT) and paratypes 2♀ (NSMT), China: southern Taiwan, Kaohsiung Hsien, Shanping Work Station of Liukuei Research Center, ca 700 m, by sifting soil litter in a forest, 9.III.2005, H. Ono leg. Not examined.

Examined materials.

6♂ 13♀ (IZCAS), China: central Taiwan , Nantou County, Ren'ai Township , Xinsheng Village , Huisun Farm, 24°05.279'N, 121°02.078'E, 788 m, 1.VII.2013, G. Zheng leg. GoogleMaps

Diagnosis.

Chimena taiwanica comb. nov. is similar to C. qiong sp. nov. in having strong, modified cheliceral spines in the males (cf. Figs 6E View Figure 6 , 4E View Figure 4 ), a long and multi-coiled embolus (cf. Figs 5A View Figure 5 , 3A View Figure 3 ), and in females, the similar configuration of the vulva, as in that of C. nantou sp. nov. (cf. Figs 6J View Figure 6 , 4J View Figure 4 , 7F View Figure 7 ). Males of C. taiwanica can be distinguished by having 2 pairs of cheliceral spines (3 pairs in C. qiong sp. nov.) (Fig. 6E View Figure 6 vs. Fig. 4E View Figure 4 and figs 8, 10 in Ono et al. 2006) and a tooth-shaped process (CyP1) (process horn-shaped in C. qiong ) (Fig. 5C, H View Figure 5 vs. Fig. 3E, G View Figure 3 ). The female differs from C. qiong sp. nov. by the moderately spiralled, thinner spermathecae tapered at the base (strongly spiralled, thicker and blunt at the base in C. qiong sp. nov.) (Fig. 6I, J View Figure 6 vs. Fig. 4I, J View Figure 4 ); and from C. nantou sp. nov. by the longer spermathecae narrowed in the middle (shorter and wider at the middle in C. nantou sp. nov.) (Fig. 6I, J View Figure 6 vs. Fig. 7E, F View Figure 7 ).

Description.

Male. Habitus as in Fig. 6A, B, E, F View Figure 6 . Total length 0.65. Carapace 0.24 long, 0.24 wide. Clypeus 0.12 high. Sternum 0.22 long, 0.20 wide. Abdomen 0.43 long, 0.43 wide. Length of legs: I 0.96 (0.30, 0.13, 0.19, 0.14, 0.20); II 0.84 (0.27, 0.11, 0.17, 0.13, 0.16); III 0.62 (0.17, 0.09, 0.12, 0.11, 0.13); IV 0.74 (0.22, 0.09, 0.15, 0.14, 0.16). Features same as in C. qiong sp. nov., except for 2 paired spines on chelicerae and darker body colouration.

Palp (Fig. 5A-H View Figure 5 ): weakly sclerotized. Femur equal to 2.4 × length of patella, patella about half of tibial width. Tibia cup-shaped in prolateral view, slightly wider than long, bearing long setae with more dorsally than ventrally. Cymbium constricted basally, enwrapping bulb ventrally and retrolaterally; distal cymbial conductor (CyC) triangular, lamellar, tooth-shaped process (CyP1) at medial margin (Fig. 5G View Figure 5 ). Paracymbium long, with sharp distal process (CyP2), a few long setae (Fig. 5C, G View Figure 5 ). CyP1 smaller and shorter than CyP2. Cymbial fold at base of CyP1 (Fig. 5B View Figure 5 ), with a few short setae (CyFs). Tegulum flat, smooth, button-shaped (Fig. 5D View Figure 5 ); subtegulum translucent, spermatic duct faintly visible. Embolus very long, filiform, strongly sclerotized, tightly coiled around entire tegulum ca 8 times, distal end extended slightly beyond cymbial conductor (CyC) (Fig. 5G, H View Figure 5 ).

Female. Habitus as in Fig. 6C, D, G View Figure 6 . Total length 0.78. Carapace 0.24 long, 0.22 wide. Clypeus 0.06 high. Sternum 0.24 long, 0.20 wide. Abdomen 0.46 long, 0.44 wide. Length of legs: I 1.00 (0.30, 0.13, 0.20, 0.15, 0.22); II 0.86 (0.27, 0.12, 0.17, 0.13, 0.18); III 0.68 (0.18, 0.09, 0.14, 0.14, 0.15); IV 0.78 (0.23, 0.10, 0.16, 0.14, 0.17). Cephalic area lower than in male, chelicerae unmodified, femur I with weak sclerotized spot; other features as in male.

Epigyne (Fig. 6H-J View Figure 6 ): vulval configuration similar to C. qiong sp. nov. Spermathecae narrow, proximally base tapering, separated by more than their length.

Distribution.

China (Taiwan) (Fig. 8 View Figure 8 ).

Remarks.

Although the type specimens of Chimena taiwanica comb. nov. (= Mysmena taiwanica Ono, 2007) have not been examined for this study, the modified strong spines on the male chelicerae, the very long, multiply coiled embolus around the bulb, the paracymbium with two processes (CyP1, CyP2), the shape of epigyne, and the protruded scape depicted in the original illustrations (see figs 8, 10, 12-15, 18-19 in Ono et al. 2006: 74-76) leave little doubt that our identification is correct. Additionally, the specimens examined here were also collected from Taiwan, not too far from the type locality.

References

Ono, H, Chang, YH, Tso, IM, 2006. Three new spiders of the families Theridiidae and Anapidae (Araneae) from southern Taiwan. Memoirs of the National Science Museum, Tokyo 44: 71 - 82, DOI: https://doi.org/10.2476/asjaa.44.71

Figures

Figure 3. Chimena qiong sp. nov., male A left palpal bulb, retrolateral B palpal bulb, prolateral C distal segments of right leg I, prolateral D cymbium, apical E cymbium, retrolateral F left palp, retrolateral G left palp, prolateral. Abbreviations: BH basal haematodocha; CyC cymbial conductor; CyF cymbial fold; CyFs setae on cymbial fold; CyP 1 process on cymbial conductor; CyP 2 process on paracymbium; PC paracymbium; E embolus; MN male metatarsal nodule at distal-prolaterally; MS male metatarsal clasping spine; SD spermatic duct; St subtegulum; Ti palpal tibia. Scale bars: 0.10 mm.

Figure 4. Chimena qiong sp. nov., male (A, B, E, F) and female (C, D, G-J) A, C habitus, dorsal B, D habitus, ventral E prosoma, front-lateral, F, G habitus, lateral H epigyne, ventral I vulva, ventral J vulva, dorsal. Abbreviations: CD copulatory ducts; CS cheliceral spines rooted at base; FD fertilization ducts; MN male metatarsal nodule at distal-prolaterally; MS male metatarsal clasping spine; S spermathecae; SP scape. Scale bars: 0.50 mm (A-D, F, G); 0.20 mm (E); 0.10 mm (H-J).

Figure 5. Chimena taiwanica (Ono, 2007) comb. nov., male A left palpal bulb, retrolateral B cymbium, apical C cymbium, dorsal-retrolateral D left palp, apical E left palp, ventral F left palp, dorsal G left palp, retrolateral H left palp, retrolateral. Abbreviations: Cy cymbium; CyC cymbial conductor; CyF cymbial fold; CyFs setae on cymbial fold; CT cymbial tooth; CyP 2 process on paracymbium; PC paracymbium; E embolus; SD spermatic duct; St subtegulum; T tegulum; Ti palpal tibia. Scale bars: 0.10 mm.

Figure 6. Chimena taiwanica (Ono, 2007) comb. nov., male (A, B, E, F) and female (C, D, G-J) A, C habitus, dorsal B, D habitus, ventral E prosoma, front-lateral F, G habitus, lateral H epigyne, ventral I vulva, ventral J vulva, dorsal. Abbreviations: CD copulatory ducts; CS cheliceral spines rooted at base; FD fertilization ducts; MS male metatarsal clasping spine; S spermathecae; SP scape. Scale bars: 0.50 mm (A-D, F, G); 0.20 mm (E); 0.10 mm (H-J).

Figure 7. Chimena nantou sp. nov., holotype female A habitus, dorsal B habitus, ventral C habitus, lateral D epigyne, ventral E vulva, ventral F vulva, dorsal. Abbreviations: CD copulatory ducts; FD fertilization ducts; S spermathecae; SP scape. Scale bars: 0.50 mm (A-C); 0.10 mm (D-F).