Sinostidia shuangjiao Yu & Li, 2021

Zhang, Jianshuang, Yu, Hao & Li, Shuqiang, 2021, On the clubionid spiders (Araneae, Clubionidae) from Xishuangbanna, China, with descriptions of two new genera and seven new species, ZooKeys 1062, pp. 73-122 : 73

publication ID

https://dx.doi.org/10.3897/zookeys.1062.66845

publication LSID

lsid:zoobank.org:pub:310272E8-F5DD-4DAB-8460-3AFCCD2E9C45

persistent identifier

https://treatment.plazi.org/id/972703D3-3FD3-41A7-9580-94AE85F8C561

taxon LSID

lsid:zoobank.org:act:972703D3-3FD3-41A7-9580-94AE85F8C561

treatment provided by

ZooKeys by Pensoft (2021-10-15 09:29:18, last updated 2024-11-30 01:43:36)

scientific name

Sinostidia shuangjiao Yu & Li
status

sp. nov.

Sinostidia shuangjiao Yu & Li View in CoL sp. nov.

Figs 21 View Figure 21 , 22 View Figure 22

Type material.

Holotype: ♂ (IZCAS-Ar34738), China: Yunnan: Xishuangbanna: Mengla County: Menglun Town: Menglun Nature Reserve: Anogeissus acuminata plantation (~ 20 years old) (21°53.993'N, 101°16.810'E, 610 m), 19 August 2007, G. Zheng leg. Paratype: 1♀ (IZCAS-Ar34739, YHCLU0155), G213 roadside, Leprosy village (21°53.590'N, 101°17.296'E, 540 m), 4 May 2019, H. Yu leg.

Other material examined.

1♂ (YHCLU0151), same data as the paratype .

Etymology.

The specific name is derived from the Chinese pinyin shuâng ji ǎ o, meaning two-horned, referring to the forked tegular apophysis; noun in apposition.

Diagnosis.

Sinostidia shuangjiao sp. nov. closely resembles S. dujiao sp. nov. (Figs 23 View Figure 23 , 24 View Figure 24 ) but can be distinguished by the shape of the copulatory organs. Males of the new species differ from those of S. dujiao sp. nov. by: (1) the bifid tip of the tegular apophysis represented by two tooth-shaped apophyses (vs. not bifid) (cf. Figs 21A-E View Figure 21 and 23C-E View Figure 23 ); (2) the filiform or claw-shaped embolic tip (vs. large and conical, cf. Figs 21B-E View Figure 21 and 23B-E View Figure 23 ); (3) the conductor is transparent and membranous (vs. thick and partly membranous) (cf. Figs 21D, E View Figure 21 and 23D, E View Figure 23 ). The female of the new species can be differentiated from S. dujiao sp. nov. by lacking an atrium (vs. atrium present) (cf. Figs 22A, B View Figure 22 and 24A, B View Figure 24 ), the copulatory openings located laterally on the epigynal plate (vs. located at anterior atrial border) (cf. Figs 22A, B View Figure 22 and 24A, B View Figure 24 ), and by the globular bursae which are smaller than the spermathecae (vs. reniform burse distinctly larger than the spermathecae) (cf. Figs 22C, D View Figure 22 and 24C, D View Figure 24 ).

Description.

Male (holotype) (Fig. 22E, F View Figure 22 ). Total length 4.73; carapace 1.75 long, 1.49 wide; opisthosoma 2.98 long, 1.16 wide. Carapace pyriform, ocular region distinctly narrowed; light orange, slightly darker frontally, without distinct pattern; fovea reddish. Eyes: AER slightly recurved, PER slightly wider than AER and procurved in dorsal view. AME dark, other eyes light; with black rings. Eye sizes and interdistances: AME 0.09, ALE 0.09, PME 0.12, PLE 0.11, AME-AME 0.03, AME-ALE 0.02, PME-PME 0.14, PME-PLE 0.08, MOQL 0.32, MOQA 0.28, MOQP 0.41. Chelicerae red-brown. Labium and endites light orange. Sternum yellowish white. Legs yellowish orange. Leg measurements: I 7.05 (1.95, 2.91, 1.43, 0.77), II 6.61 (1.86, 2.1, 1.44, 0.70), III 5.27 (1.55, 1.72, 1.44, 0.56), IV 7.67 (2.12, 2.59, 2.23, 0.73). Abdomen (Fig. 22E, F View Figure 22 ) lanceolate, dorsum with numerous inconspicuous patches; venter white; all spinnerets without distinct markings.

Palp (Fig. 21A-E View Figure 21 ): Retrolateral tibial apophysis claw-shaped, retrolaterally pointed, ~ 1/2 of tibia length, with curved, sharp apex; ventral tibial apophysis pointed anteriorly, thumb-like, ~ 1/3 of tibia length. Bulb oval, ~ 2 × longer than wide, sperm duct indistinct in ventral view. Tegular apophysis large, as long as tegulum width, originating retrolaterally on tegulum, with bifurcated distally, covering embolic base. Embolus claw-shaped, tip extended to apex of cymbium, directed antero-prolaterally; embolic base as long as free (filamentous) part of embolus, represented by enlarged tubercle located prolaterally (~ 10 o’clock relative to tegulum). Conductor membranous, ~ 1/2 embolus length, originating distally on tegulum, base wide, apex narrowed, folded.

Female (paratype IZCAS-Ar34739). Total length 5.60; carapace 2.36 long, 1.74 wide; opisthosoma 3.21 long, 1.54 wide. General characters as in males, but slightly larger and lighter (Fig. 22G, H View Figure 22 ). Eye sizes and interdistances: AME 0.11, ALE 0.13, PME 0.13, PLE 0.09, AME-AME 0.06, AME-ALE 0.05, PME-PME 0.21, PME-PLE 0.11, MOQL 0.34, MOQA 0.36, MOQP 0.52. Legs uniformly white. Leg measurements: I 6.97 (1.97, 2.85, 1.38, 0.77), II 6.16 (1.70, 2.43, 1.34, 0.69), III 5.41 (1.66, 1.71, 1.50, 0.53), IV 7.97 (2.01, 2.80, 2.22, 0.95).

Epigyne (Fig. 22A-D View Figure 22 ): Plate distinctly wider than long, with shallow depression located anteriorly. Depression broad, width almost equal to the plate width, ellipsoid, ~ 1.6 × wider than long; bounded by numerous, relatively long setae, sparse anteriorly, dense posteriorly and laterally. Copulatory openings small but distinct, located laterally in depression, separated by ~ 15 diameters, leading to short copulatory ducts which descend obliquely to spermathecae. Spermathecae consisting of twisted base and globular head; spermathecal heads separated by 2/3 of their diameter. Bursae globular, close together, translucent. Fertilisation ducts indistinct.

Distribution.

Known only from the type locality.

Gallery Image

Figure 21. Male palp of the holotype of Sinostidia shuangjiao sp. nov. A prolateral view B retrolateral view C bulb, prolateral view D bulb, ventral view E bulb, retrolateral view. Abbreviations: C = conductor; E = embolus; EB = embolic base; RTA = retrolateral tibial apophysis; TA = tegular apophysis; VTA = ventral tibial apophysis. Scale bars: 0.10 mm (equal for A, B, equal for C-E).

Gallery Image

Figure 22. Sinostidia shuangjiao sp. nov., female paratype and male holotype, epigyne (A-D), male habitus (E, F) and female habitus (G, H) A intact, ventral view B cleared, ventral view C cleared, dorsal view D cleared, dorsal view E dorsal view F lateral view G dorsal view H ventral view. Abbreviations: BS = bursa; CD = copulatory duct; CO = copulatory opening; SB = spermathecal base; SH = spermathecal head; SP = spermatheca. Scale bars: 0.10 mm (equal for A-D); 1 mm (equal for E, F, equal for G, H).

Gallery Image

Figure 23. Male palp of the holotype of Sinostidia dujiao sp. nov. A prolateral view B retrolateral view C bulb, prolateral view D bulb, ventral view E bulb, retrolateral view. Abbreviations: C = conductor; E = embolus; EB = embolic base; RTA = retrolateral tibial apophysis; TA = tegular apophysis; VTA = ventral tibial apophysis. Scale bars: 0.10 mm (equal for A, B, equal for C-E).

Gallery Image

Figure 24. Sinostidia dujiao sp. nov., female paratype and male holotype, epigyne (A-D), male habitus (E, F) and female habitus (G, H) A intact, ventral view B cleared, ventral view C cleared, dorsal view D cleared, dorsal view E dorsal view F lateral view G dorsal view H ventral view. Abbreviations: BS = bursa; CD = copulatory duct; CO = copulatory opening; SB = spermathecal base; SH = spermathecal head; SP = spermatheca. Scale bars: 0.10 mm (equal for A-D); 1 mm (equal for E, F, equal for G, H).

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Clubionidae

Genus

Sinostidia