Tasa koreanus ( Wesolowska , 1981), 2022

Jin, Chi, Liu, Siyuan, Wang, Lixin, Luo, Manping & Chen, Kai, 2022, Re-validation and re-description of Tasa koreana (Wesolowska, 1981) (Araneae, Salticidae), Biodiversity Data Journal 10, pp. 87443-87443 : 87443

Tasa koreanus ( Wesolowska, 1981) comb. rev.

Pseudicius koreanus Wesołowska, 1981, see Wesołowska (1981): 60, f. 52-55, ♀ (female holotype from North Korea: Pyeongyang, deposited in the Institute of Zoology of the Polish Academy of Science in Warszawa, not examined); Peng et al. (1993): 192, f. 677-679, ♀♂ (only female; male misidentified = Icius koreanus Xiao, 1993); Song et al. (1999): 542, f. 312M, 313O, 328P, ♀♂ (only female; male misidentified = Icius koreanus Xiao, 1993); Ono et al. (2009): 570, f. 104-106, ♀♂ (only female; male misidentified = P. tokaraensis ); Yin et al. (2012): 1451, f. 791a-i, ♀♂ (only female; male misidentified = Icius koreanus Xiao, 1993); Peng (2020): 367, f. 264a-i, ♀♂ (only female; male misidentified = Icius koreanus Xiao, 1993).

Icius koreanus ( Wesołowska, 1981), see Yaginuma (1986): 233, f. 130.1, ♀ (female transferred from Pseudicius ); Bohdanowicz and Prószyński (1987): 67, f. 72-73, ♀♂ (only female; male misidentified = P. tokaraensis ); Xiao (1993): 123, f. 1-6, ♂ (male misidentified = unknown species).

Tasa nipponica Bohdanowicz & Prószyński, 1987, see Bohdanowicz and Prószyński (1987): 143, f. 300-303, ♂ (male holotype from Japan: Kochi Pref., depository cannot be traced, not examined); Chen and Zhang (1991): 318, f. 339, ♂; Seo (1992): 183, f. 13-16, ♂; Ikeda (1995): 163, f. 15-20, ♂; Song et al. (1999): 561, f. 319N-O, ♂; Cho and Kim (2002): 136, f. 89, 198-199, ♂; Namkung (2002): 590, f. 43.34a-b, ♂; Namkung (2003): 594, f. 43.34a-b, ♂; Ono et al. (2009): 574, f. 149-153, ♂; Kim and Lee (2014): 143, f. 102A-C, ♂; Prószyński (2016): 4 (removed from synonym of Tasa koreana , rejected here); Prószyński (2017): 31, f. 13L, ♂; Peng (2020): 468, f. 343a-b, ♂.

Pseudicius tokaraensis (Bohdanowicz & Prószyński, 1987) - Suguro and Yahata (2014): 90, f. 10, 16-17, 21-22, ♂ (male misidentified per Prószyński, 2016: 4, rejected here).

Tasa koreana Suguro & Yahata, 2014, see Suguro and Yahata (2014): 94, f. 12, 14, 25, 27-28, ♀♂ (female transferred from Pseudicius koreanus ; male transferred from Tasa nipponica ).

Materials

Type status: Other material. Occurrence: recordedBy: Chi Ji; individualCount: 1; sex: male; lifeStage: adult; Taxon : scientificName: Tasa koreanus ( Wesołowska, 1981); namePublishedIn: Suguro, T. and Yahata, K. 2014. Acta Arachnologica , 63(2): 94.; class: Arachnida ; order: Araneae ; family: Salticidae ; genus: Tasa ; Location : continent: Asia ; country: China; countryCode: CN; stateProvince: Hebei; county: Hanshan District ; municipality: Handan ; locality: Fuyang Park ; verbatimElevation: 53 m; verbatimLatitude: 36.5927°N; verbatimLongitude: 114.5102°E; Identification: identifiedBy: Chi Jin; Event: samplingProtocol: by hand; year: 2019; month: 6; day: 1; habitat: tree trunk Type status: Other material. Occurrence: recordedBy: Chi Ji; individualCount: 1; sex: female; lifeStage: adult; Taxon : scientificName: Tasa koreanus ( Wesołowska, 1981); namePublishedIn: Suguro, T. and Yahata, K. 2014. Acta Arachnologica , 63(2): 94.; class: Arachnida ; order: Araneae ; family: Salticidae ; genus: Tasa ; Location : continent: Asia ; country: China; countryCode: CN; stateProvince: Hebei; county: Hanshan District ; municipality: Handan ; locality: Fuyang Park ; verbatimElevation: 53 m; verbatimLatitude: 36.5927°N; verbatimLongitude: 114.5102°E; Identification: identifiedBy: Chi Jin; Event: samplingProtocol: by hand; year: 2019; month: 6; day: 1; habitat: tree trunk

Description

Male (Fig. 1 A and B, Fig. 2 A and B, Fig. 3 A-E and Fig. 4 A). Total length 4.33. Carapace 1.89 long, 1.31 wide. Abdomen 2.44 long, 1.44 wide. Eye sizes: AME 0.29, ALE 0.13, PME 0.04, PLE 0.14, AERW 0.99, PERW 1.00, EFL 0.70. Legs: I 3.58 (1.06 + 0.74 + 0.85 + 0.59 + 0.34), II 2.68 (0.82 + 0.52 + 0.54 + 0.47 + 0.33), III 2.62 (0.80 + 0.48 + 0.50 + 0.50 + 0.34), IV 3.37 (1.06 + 0.54 + 0.71 + 0.67 + 0.39).

Carapace dark brown, elongate and flat, nearly rectangular; dorsal surface covered with dense white hairs (Fig. 2 A); lateral surface hairless (Fig. 1 B). Fovea indistinct, short and longitudinal. Eye field black, surrounded by sparse black setae. Chelicerae dark brown (Fig. 4 A), with two promarginal and one retromarginal teeth. Labium black and as wide as long. Endites dark brown. Sternum brown. Abdomen elongated oval, grey-white, covered with dense white hairs and sparse black hairs, with a pair of light brown, mottled stripes running through entire dorsum; dorsal scutum absent (Fig. 2 A); venter with two columns of indistinct sclerites between epigastric furrow and spinnerets; spinnerets brown (Fig. 2 B). Leg I dark brown; legs II-IV yellowish-brown (Fig. 2 B). Palps dark brown. Spination of legs as shown in Table 1 .

Palp (Fig. 3 A-E). Bulb nearly triangular in ventral view, retrolateral side with a small protrusion; sperm duct extending along margin; tegular lobe curved prolaterally. Embolus stubby and hook-shaped. RTA bifurcated, ventral branch as long as dorsal branch, blunt; dorsal ramus well-developed, pointed with about ten teeth of various sizes, along ventral margin, distributed from RTA base to tip of dorsal branch. Cymbium distally curled retrolaterally, forming a groove to accommodate embolus.

Female (Fig. 1 C and D, Fig. 2 C and D and Fig. 4 B-F). Total length 4.17. Carapace 1.84 long, 1.23 wide. Abdomen 2.33 long, 1.50 wide. Eye sizes: AME 0.28, ALE 0.14, PME 0.04, PLE 0.14, AERW 0.98, PERW 1.06, EFL 0.73. Legs: I 2.70 (0.87 + 0.56 + 0.53 + 0.45 + 0.29), II 2.36 (0.74 + 0.50 + 0.44 + 0.40 + 0.28), III 2.59 (0.81 + 0.46 + 0.46 + 0.51 + 0.35), IV 3.34 (1.03 + 0.54 + 0.69 + 0.64 + 0.44).

Carapace with dark brown thorax, bright brown lateral sides and black eye field; almost entirely covered with dense white hairs, but hairless at junction of dorsal and lateral surface (Fig. 1 D). Chelicerae bright brown (Fig. 4 B). Labium brown and as wide as long. Endites bright brown. Sternum yellowish-brown. Abdomen grey-white, dorsal stripes similar to males, but darker in colour (Fig. 2 C); venter without sclerites; spinnerets yellowish-brown (Fig. 2 D). Legs and palps light yellow (Fig. 2 D); distal prolateral portion of femur I with 5-6 sclerotised hairs from raised sockets in a Y-shaped arrangement (Fig. 4 C). Spination of legs as shown in Table 1 . Other somatic characters as in male.

Epigyne (Fig. 4 D): copulatory openings located posteriorly, large and oval, sharing a sclerotised posterior margin. Vulva (Fig. 4 E and F): copulatory ducts stout, twisted in S-shape; spermathecae small, close to each other and have no obvious boundary with copulatory ducts; accessory glands short, located below anterior margin of copulatory ducts.

Diagnosis

This species closely resembles Tasa davidi (Schenkel 1963), but can be distinguished from it by: 1) the two branches of RTA nearly equal in length, whereas the ventral branch is much shorter than the dorsal one in T. davidi (Fig. 3 C, Wesołowska 1981: 157, fig. 90); 2) the accessory glands short and located below the anterior margin of the copulatory ducts, whereas they are longer and located significantly above the anterior margin of the copulatory ducts in T. davidi (Fig. 4 C and D, Peng et al. 2000: 19, fig. 17).

Distribution

China (Hebei, Zhejiang Province), Japan, Korea.

Biology

Habitat on tree trunks or branches.

Taxon discussion

The female of this species closely resembles the female of T. davidi , the type species of the genus Tasa , justifying its transfer to Tasa . Additionally, the stubby embolus of the male (sub T. nipponica ) corresponds with the large copulatory openings and stout copulatory ducts of its female (sub P. koreanus ) (Figs 3 , 4 ). Relatively, in N. koreanus , the slender embolus of the male (sub P. tokaraensis ) clearly does not correspond with the large copulatory openings and stout copulatory ducts of its so-called female (sub P. koreanus ) ( Prószyński 2016: 22, figs. 7C-D). The figures of the epigyne and vulva of this species, presented in Suguro and Yahata (2014) (95, figs. 29-30), are more similar to T. davidi than to T. koreanus , possibly due to different illustration or processing methods, which will require future examination of their specimens to confirm.

Figures

Figure 1. Living spiders of Tasa koreanus (Wesolowska, 1981): A-B male; C-D female. Photographs by Chi Jin.

Figure 2. Tasa koreanus (Wesolowska, 1981): A male habitus, dorsal view; B same, ventral view; C female habitus, dorsal view; D same, ventral view.

Figure 3. Tasa koreanus (Wesolowska, 1981): A male left palp, ventral view; B same, retrolateral-ventral view; C same, retrolateral view; D same, dorsal view; E same, prolateral view. Abbreviations: E-embolus; dRTA-dorsal branch of retrolateral tibial apophysis; TL-tegular lobe; vRTA-ventral branch of retrolateral tibial apophysis.

Figure 4. Tasa koreanus (Wesolowska, 1981): A male cephalothorax, frontal view; B female cephalothorax, frontal view; C female left femur I, prolateral view, red arrow points to the sclerotic and raised sockets; D epigyne, ventral view; E vulva, dorsal view; F schematic of internal duct system, dorsal view. Abbreviations: AG-accessory gland; CD-copulatory duct; CO-copulatory opening; FD-fertilisation duct; S-spermatheca.