Liphistius champakpheaw Sivayyapram & Warrit, 2024

Sivayyapram, Varat, Kunsete, Chawakorn, Xu, Xin, Smith, Deborah R., Traiyasut, Prapun, Deowanish, Sureerat, Aung, Mu Mu, Ono, Hirotsugu, Li, Daiqin & Warrit, Natapot, 2024, Seven new species of the segmented spider genus Liphistius (Mesothelae, Liphistiidae) in Thailand and Myanmar, ZooKeys 1189, pp. 201-229 : 201

Liphistius champakpheaw Sivayyapram & Warrit sp. nov.

Figs 1 , 12 , 13 , 14

Type material.

Holotype: Thailand • 1♂; Saraburi, Kaeng Khoi District, Cham Phak Phaeo; alt. 82 m; 19 August 2017; N. Warrit, V. Sivayyapram, C. Kunsete, N. Chatthanabun, P. Traiyasut leg.; ARA-2017-146. Allotype: Thailand • 1♀; same data as for the holotype; ARA-2017-146a.

Diagnosis.

Liphistius champakpheaw sp. nov. is similar to L. kaengkhoi sp. nov., L. hintung sp. nov., L. buyphradi sp. nov., and L. suwat in its general appearance. Liphistius champakpheaw sp. nov. is closely similar to L. buyphradi sp. nov. but can be distinguished by the male palp with tegulum that is short, obliqued, with dentate proximal edge (moderately long, arched in L. buyphradi sp. nov., Fig. 11C ). The female L. champakpheaw sp. nov. is difficult to distinguish from those of the L. kaengkhoi sp. nov., L. hintung sp. nov., L. buyphradi sp. nov., and L. suwat Schwendinger, 1996. Molecular phylogeny and species delimitation using COI and multi-locus data support monophyly and species status of all new species described here ( Sivayyapram et al. 2023).

Description.

Male (Holotype: ARA-2017-146; Fig. 12A, B ). Coloration (in alcohol): carapace brown, slightly paler in the central area, without any distinct markings; abdominal tergites black, except for cream colored spots on the posterior margin; membranous part of the opisthosoma cream colored with black mottled spots; chelicerae olive green, paler at the proximal part; palp and legs uniformly brown.

Palp (Fig. 13A-D ): tibial apophysis wide distally, carrying four tapering megaspines; paracymbium round but flat, dark patch with spicules isolated by a pale band; cumulus plain, bearing several long bristles; subtegulum without apophysis; contrategulum without apophysis, distal edge of the contrategulum long with slight concavity leading to the truncate apex; tegulum moderate, proximal margins with short, tooth-like coarsely dentate edge; distal margin oblique, with large apophysis; paraembolic plate projected into scale-like plate, large, basally wide, running to blunt distal margin; embolus proper: sclerotized part with two longitudinal ridges reaching to the tip.

Measurements: Total length 14.82; carapace 7.54 long, 7.02 wide; opisthosoma 7.41 long, 5.46 wide; ocular tubercle 1.17 long, 1.43 wide; palpal coxa 2.10 long, 1.17 wide; labium 0.78 long, 1.30 wide; sternum 3.90 long, 3.64 wide (1.17 on ventral surface); palp 12.22 long (4.03 + 1.56 + 4.42 + - + 2.21); leg I 23.53 long (6.89 + 2.86 + 5.07 + 6.24 + 2.47); leg II 24.83 long (7.02 + 2.99 + 5.07 + 6.76 + 2.99); leg III 28.34 long (7.28 + 3.38 + 5.72 + 8.32 + 3.64); leg IV 34.84 long (8.84 + 3.51 + 7.15 + 10.92 + 4.42).

Female (Allotype: ARA-2017-146a; Fig. 12C, D ). Coloration (in alcohol): carapace orange with black markings on the coxal elevations and the carapace margins; abdominal tergites with black markings except for the cream color on the posterior margin; membranous part of the opisthosoma cream colored with mottled black spots; chelicerae orange; palp and legs orange with black annulation on the proximal and distal part of tarsi.

Vulva (Fig. 13E, F ): vulva plate triangular, as long as wide; genital atrium with a few hairs and wrinkle posterior margin; posterior stalk U-shape, short but wide; pore plate quadrangular, slightly longer than wide; lateral margins thickened and projected into lips, bearing moderate anterolateral lobe; anterior margin arched, less thickened but not projected into a lip; receptacular cluster racemose longer than wide; central dorsal opening longer than wide.

Measurements: Total length 19.37; carapace 9.23 long, 7.41 wide; opisthosoma 9.88 long, 8.06 wide; ocular tubercle 1.17 long, 1.56 wide; palpal coxa 3.25 long, 2.08 wide; labium 1.17 long, 2.47 wide; sternum 5.07 long, 2.86 wide (1.69 on ventral surface); palp 15.73 long (5.59 + 3.12 + 3.77 + - + 3.25); leg I 18.72 long (6.24 + 3.51 + 3.77 + 3.38 + 1.82) leg II 18.59 long (5.72 + 3.38 + 3.77 + 3.90 + 1.82); leg III 20.15 long (6.11 + 3.38 + 3.90 + 4.42 + 2.34); leg IV 28.99 long (8.32 + 3.90 + 5.59 + 7.80 + 3.38).

Etymology.

The specific epithet champakpheaw refers to Cham Pak Pheaw subdistrict, the type locality of the new species in Saraburi, Thailand.

Distribution.

Known only from the type locality.

Comment.

This new species name was mentioned as Liphistius sp. CPP in Sivayyapram et al. (2023).

Figures

Figure 1. Map showing the localities of the new Liphistius species described.

Figure 11. Liphistius buyphradi sp. nov. male palp and vulva plate A-D ARA- 2017 - 139 (holotype) palp A prolateral view B ventral view C retrolateral view D distal view E, F ARA- 2017 - 140 (allotype) vulva plate E ventral view F dorsal view. Abbreviations: CDO = central dorsal opening; CT = contrategulum; Cu = cumulus; de = distal edge of the contrategulum; Em = embolus; GA = genital atrium; mm = millimeter; PC = paracymbium; PeP = paraembolic plate; PP = poreplate; PS = posterior stalk; RC = receptacular cluster; ST = subtegulum; T = tegulum; TiA = tibial apophysis. Scale bar: 1 mm.

Figure 12. Liphistius champakpheaw sp. nov. A, B male ARA- 2017 - 146 (holotype) C, D female, ARA- 2017 - 146 a (allotype) A, C dorsal view B, D lateral view. Scale bar: 10 mm.

Figure 13. Liphistius champakpheaw sp. nov. male palp and vulva plate A-D ARA- 2017 - 146 (holotype) palp A prolateral view B ventral view C retrolateral view D distal view E, F ARA- 2018 - 146 a (allotype) vulva plate E ventral view F dorsal view. Abbreviations: CDO = central dorsal opening; CT = contrategulum; Cu = cumulus; de = distal edge of the contrategulum; Em = embolus; GA = genital atrium; mm = millimeter; PC = paracymbium; PeP = paraembolic plate; PP = poreplate; PS = posterior stalk; RC = receptacular cluster; ST = subtegulum; T = tegulum; TiA = tibial apophysis. Scale bar: 1 mm.

Figure 14. Left to right: Liphistius kaengkhoi sp. nov., Liphistius hintung sp. nov., Liphistius buyphradi sp. nov., and Liphistius champakpheaw sp. nov. A male dorsal view B male palp C female dorsal view D vulva plate. Scale bars: 10 mm (A, C); 1 mm (B, D).