Liphistius hintung 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 hintung Sivayyapram & Warrit sp. nov.

Figs 1 , 8 , 9 , 14

Type material.

Holotype: Thailand • 1♂; Nakhon Nayok, Mueang Nakhon Nayok District, Hin Tung; alt. 90 m; 27 November 2018; D. Li, L. Yu V. Sivayyapram leg.; ARA-2018-299. Allotype: Thailand • 1♀; same data as for the holotype; ARA-2018-296. Paratype: Thailand • 1 juvenile; same data as for the holotype; ARA-2018-297.

Diagnosis.

Liphistius hintung sp. nov. is similar to L. kaengkhoi sp. nov., L. buyphradi sp. nov., L. champakpheaw sp. nov., and L. suwat in its general appearance. Liphistius hintung sp. nov. is closely similar to L. kaengkhoi sp. nov. but can be distinguished by the male palp: tegulum with coarser proximal dental edge and longer paraembolic plate (Figs 7A-D , 9A-D ). The female L. hintung sp. nov. is difficult to distinguish from those of the L. kaengkhoi sp. nov., L. buyphradi sp. nov., L. champakpheaw 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-2018-299; Fig. 8A, B ). Coloration (in alcohol): carapace pale brown, with black stripe along the lateral and posterior margins; abdominal tergites almost black, paler on the posterior ones; membranous part of the opisthosoma cream in color with black mottled spots; chelicerae olive green, paler at the proximal part; palp and legs uniformly brown.

Palp (Fig. 9A-D ): tibial apophysis pronounce, carrying one long slender and three tapering megaspines; paracymbium conical, dark patch with spicules isolated by a pale band; cumulus plain, bearing some bristles; subtegulum without apophysis; contrategulum without apophysis, distal edge of contrategulum long and thick, slightly concave leading to the blunt apex; tegulum large, indistinctly separated from the contrategulum, axe-blade shaped, proximal margin with moderate long, coarsely dentate edge, distal margin oblique with large apophysis; pigmental bridge between the tegulum and contrategulum distinct; paraembolic plate projected into scale-like plate, basally wide with long and pointed distal edge; embolus proper: sclerotized part with two longitudinal ridges running to the truncate apex.

Measurements: Total length 12.09; carapace 6.76 long, 6.37 wide; opisthosoma 5.33 long, 3.64 wide; ocular tubercle 1.17 long, 1.17 wide; palpal coxa 2.21 long, 1.56 wide; labium 0.78 long, 1.82 wide; sternum 3.64 long, 1.95 wide (1.04 on ventral surface); palp 12.35 long (3.90 + 2.34 + 4.03 + - + 2.08); leg I 19.37 long (5.85 + 2.99 + 3.90 + 4.42 + 2.21); leg II 19.89 long (5.72 + 2.73 + 4.03 + 5.20 + 2.21); leg III 22.88 long (6.11 +3.12 + 4.55 + 6.37 + 2.73); leg IV 27.81 long (7.14 + 3.25 + 5.72 + 8.45 + 3.25).

Female (Allotype: ARA-2018-296; Fig. 8C, D ). Coloration (in alcohol): carapace orange, with black marking behind the ocular tubercle running to the fovea and coxal elevations and black stripe along the carapace margins, thicker on the anterior margin; abdominal tergites pale brown with large black marking; membranous part of the opisthosoma cream colored with mottled black spots; palp and legs orange with black annulations on the metatarsus and tarsus.

Vulva (Fig. 9E, F ): vulva plate hexagonal; genital atrium with a few hairs; posterior stalk trapezoidal, wider anteriorly; pore plate almost square, lateral margins thickened and projected into a lip, bearing indistinct anterolateral lobes; anterior margin convex, less thicken and not project into a lip; receptacular clusters racemose, longer than wide; central dorsal opening wide, longer than wide.

Measurements: Total length 16.90; carapace 8.06 long, 7.02 wide; opisthosoma 8.32 long, 6.63 wide; ocular tubercle 1.17 long, 1.17 wide; palpal coxa 2.60 long, 1.43 wide; labium 1.04 long, 2.08 wide; sternum 3.77 long, 2.60 wide (1.56 on ventral surface); palp 13.91 long (4.94 + 2.47 + 3.38 + - + 3.12); leg I 16.90 long (5.59 + 3.12 + 3.38 + 3.12 + 1.69); leg II 17.81 long (5.72 + 2.99 + 3.77 + 3.51 + 1.82); leg III 18.72 long (5.59 + 3.12 + 3.77 + 4.16 + 2.08); leg IV 26.26 long (7.54 + 3.51 + 5.20 + 6.63 + 3.38).

Etymology.

The specific epithet hintung refers to Hintung District, the type locality of the new species in Nakhon Nayok, Thailand.

Distribution.

Known only from the type locality.

Comment.

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

Figures

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

Figure 7. Liphistius kaengkhoi sp. nov. male palp and vulva plate A-D ARA- 2018 - 284 (holotype) palp A prolateral view B ventral view C retrolateral view D distal view E, F ARA- 2018 - 286 (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 8. Liphistius hintung sp. nov. A, B male ARA- 2018 - 299 (holotype) C, D female, ARA- 2018 - 296 (allotype) A, C dorsal view B, D lateral view. Scale bar: 10 mm.

Figure 9. Liphistius hintung sp. nov. male palp and vulva plate A-D ARA- 2018 - 299 (holotype) palp A prolateral view B ventral view C retrolateral view D distal view E, F ARA- 2018 - 296 (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).