Clubiona milingae Barrion-Dupo, Barrion & Heong, 2013

Zhang, Jianshuang, Yu, Hao & Chen, Jian, 2020, First description of the female of Clubiona milingae Barrion-Dupo, Barrion & Heong, 2013 (Araneae, Clubionidae), Biodiversity Data Journal 8, pp. 51789-51789 : 51789

Clubiona milingae Barrion-Dupo, Barrion & Heong, 2013

Materials

Type status: Other material. Occurrence: recordedBy: Qianyu Wan; individualCount: 3; sex: 2 females and 1 male; lifeStage: adult; behavior: foraging; occurrenceStatus: present; preparations: whole animal (ETOH); Taxon: scientificName: Clubionamilingae; acceptedNameUsage: Clubionamilingae Barrion-Dupo, Barrion & Heong, 2013; order: Araneae; family: Clubionidae; genus: Clubiona; specificEpithet: milingae; taxonRank: species; taxonomicStatus: accepted; Location: continent: Asian; island: Hainan; country: China; countryCode: CHN; stateProvince: Hainan; county: Ledong; verbatimElevation: 900-1000 m; verbatimCoordinateSystem: decimal degrees; decimalLatitude: 18.726088; decimalLongitude: 108.902750; Identification: identifiedBy: Hao Yu; dateIdentified: 11-2018; identificationReferences: Barrion et al. 2013; Event: samplingProtocol: Beating; eventDate: 10-4-2018; year: 2018; month: 4; day: 10; habitat: Rubber-tea plantation Type status: Other material. Occurrence: recordedBy: Jie Liu; Haiqing Ren; individualCount: 3; sex: 2 females and 1 male; lifeStage: adult; behavior: foraging; occurrenceStatus: present; preparations: whole animal (ETOH); Taxon: scientificName: Clubionamilingae; acceptedNameUsage: Clubionamilingae Barrion-Dupo, Barrion & Heong, 2013; order: Araneae; family: Clubionidae; genus: Clubiona; specificEpithet: milingae; taxonRank: species; taxonomicStatus: accepted; Location: continent: Asian; island: Hainan; country: China; countryCode: CHN; stateProvince: Hainan; county: Qiongzhong; verbatimElevation: 600-700 m; verbatimCoordinateSystem: decimal degrees; decimalLatitude: 19.206780; decimalLongitude: 109.768095; Identification: identifiedBy: Hao Yu; dateIdentified: 11-2018; identificationReferences: Barrion et al. 2013; Event: samplingProtocol: Pitfall trap; eventDate: 18-8-2009; year: 2009; month: 8; day: 18; habitat: Rubber-tea plantation

Description

Female (Fig. 1 A-C). Total length 2.70; carapace 1.34 long, 0.92 wide; abdomen 1.36 long, 0.78 wide.

Carapace yellowish-white, without distinct pattern. Fovea red. In dorsal view, anterior eye row (AER) slightly recurved, posterior eye row (PER) procurved, PER wider than AER. Eye sizes and inter-distances (mm): anterior median eyes (AME) 0.06, anterior lateral eyes (ALE) 0.08, posterior median eyes (PME) 0.09, posterior lateral eyes (PLE) 0.07; distance between AMEs (AME-AME) 0.02, distance between AME and ALE (AME-ALE) 0.04, distance between PMEs (PME-PME) 0.19, distance between PME and PLE (PME-PLE) 0.10. Length of median ocular quadrangle (MOQ) 0.20, MOQ anterior width 0.24, MOQ posterior width 0.35. Chelicerae coloured as carapace, with 5 teeth on promargin and 3 on retromargin. Labium and endites light brown. Sternum 0.86 long, 0.52 wide.

Abdomen elongate-oval, white, with inconspicuous anterior tufts of hairs, dorsum with a pair of inconspicuous muscular depressions; venter white.

Legs uniformly yellowish-white. Leg lengths: I 2.10 (0.64, 0.73, 0.41, 0.32), II 2.55 (0.75, 1.01, 0.45, 0.34), III 1.91 (0.66, 0.64, 0.38, 0.23), IV 3.11 (0.93, 1.08, 0.78, 0.32).

Epigyne (Fig. 2 ). Epigynal plate longer than wide, anterior and posterior margin not delimited; atrium absent; spermathecae (SP) clearly visible through the tegument in ventral view; two copulatory openings (CO) small, separated by one diameter, situated at medial portion of epigynal plate posterior margin; hyaline copulatory ducts (CD) thin and straight, close together, ascending anteriorly, connected to ovoid spermathecae; bursae (BS) oblong, translucent, surface smooth, connected to copulatory ducts at mid-length between copulatory openings and spermathecae; fertilisation ducts (FD) short and curved, membranous, located on baso-dorsal surface of spermathecae.

Male (Fig. 1 D-F). Total length 2.64; carapace 1.46 long, 1.01 wide; abdomen 1.18 long, 0.87 wide. Eye sizes and inter-distances: AME 0.08, ALE 0.10, PME 0.09, PLE 0.09; AME-AME 0.10, AME-ALE 0.04, PME-PME 0.22, PME-PLE 0.10. MOQL 0.24, MOQA 0.26, MOQP 0.39. Sternum 0.72 long, 0.49 wide. Leg measurements: I 2.46 (0.65, 0.98, 0.44, 0.39), II 2.63 (0.79, 1.10, 0.48, 0.26), III 2.27 (0.66, 0.59, 0.73, 0.29), IV 3.18 (0.94, 1.09, 0.65, 0.50). General characters as in female but slightly smaller and darker.

Palp (Fig. 3 ). Tibia short, with three apophyses, prolateral tibial apophysis (PTA) with a wide base and a blunt tip, thumb-like in prolateral view; ventral tibial apophysis (VTA) distinctly elevated, coniform in ventral view and finger-like in prolateral view; retrolateral tibial apophysis (RTA) broad and long, well-developed, tip extending to mid-length of cymbium, distally bifurcate in retrolateral view, both tips blunt, ventral ramus smaller than the dorsal one; cymbium, dorsally with cymbial apophysis, dorsal cymbial apophysis (DCA) subtriangular in lateral view; tegulum elongated and bulging, membranous and semi-transparent, except its margin in ventral view; sperm duct indistinct, starting on the apico-prolateral flank (approximately 10 o’clock of the tegulum), continuing around the tegulum, ending at embolar apex; embolus (E) relatively long, originating from retrolateral side of tegulum, its apex flagelliform and directed retrolaterally; conductor absent.

Diagnosis

Females of C. milingae can be easily distinguished from other members of the C. apiculata -group with the exception of C. yaoi (the only other C. apiculata -group species in China: Yu and Li 2019: 152, figures 2A-D), by the oblong bursae (bursae are spherical in all other apiculata -group species), but differing from C. yaoi by the copulatory openings situated at the medial portion of the epigynal plate posterior margin (Fig. 2 A, B, D) (vs. copulatory openings situated basolaterally in C. yaoi ). Males also resemble those of C. yaoi in having a retrolateral tibial apophysis with a bifurcate tip (retrolateral tibial apophysis distally unforked in all other apiculata -group species), but can be recognised by the relatively long embolus and by the absence of a conductor (Fig. 3 A-D) (vs. embolus represented by small spicule and conductor present in C. yaoi ). In addition, the two species can by separated by their habitus: abdomen marked with numerous inconspicuous spots in C. milingae (Fig. 1 A, D), but with a median heart-shaped mark which extends half the length of the opisthosoma in C. yaoi .

Distribution

Known from Mt. Diaoluo and Mt. Limu, Hainan Island, China (Fig. 4 ).

Biology

Most of the new material was collected by pitfall-traps set in a rubber-tea plantation.

Figures

Figure 1. Habitus of Clubiona milingae, female (A-C) and male (D-F). A, D. Dorsal view; B, E. Ventral view; C, F. Lateral view. Scale bars: 0.5 mm (equal for A-C, equal for D-F).

Figure 2. Female epigyne of Clubiona milingae. A. Epigyne, intact, ventral view; B. Epigyne, cleared, ventral view; C. Vulva, cleared, dorsal view; D. Epigyne, cleared and embedded in Arabic gum, ventral view; E. Vulva, cleared and embedded in Arabic gum, dorsal view. Scale bars: 0.1 mm. Abbreviations: BS, bursa; CD, copulatory duct; CO, copulatory opening; FD, fertilisation duct; SP, spermatheca.

Figure 3. Male left palp of Clubiona milingae. A. Ventral view; B. Dorsal view; C. Prolateral view; D. Retrolateral view. Scale bars: 0.1 mm. Abbreviations: DCA, dorsal cymbial apophysis; E, embolus; EB, embolic base; PTA, prolateral tibial apophysis; RTA, retrolateral tibial apophysis; VTA, ventral tibial apophysis.

Figure 4. Location of Hainan Island (green) and distribution records of Clubiona milingae (red circles).