Liphistius buyphradi 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 buyphradi Sivayyapram & Warrit sp. nov.

Figs 1 , 10 , 11 , 14

Type material.

Holotype: Thailand • 1♂; Saraburi, Mueang Saraburi District, Nong Pla Lai; alt. 90 m; 17 August 2017; N. Warrit, V. Sivayyapram, C. Kunsete, N. Chatthanabun, P. Traiyasut leg.; ARA-2017-139. Allotype: Thailand • 1♀; same data as for the holotype; ARA-2017-140. Paratype: Thailand • 1♀; same data as for the holotype; ARA-2017-138.

Diagnosis.

Liphistius buyphradi sp. nov. is similar to L. kaengkhoi sp. nov., L. champakpheaw sp. nov., L. hintung sp. nov. and L. suwat in its general appearance. The male of L. buyphradi sp. nov. can be distinguished from those species, except for L. champakpheaw sp. nov., by the male palp with flat paracymbium (Fig. 14 ; Schwendinger 1996: fig. 43A); and from L. champakpheaw sp. nov. by the male palp with proximal edge of the tegulum moderately long, arched, and finely dentate (short, oblique in L. champakpheaw sp. nov.; Fig. 13C ). The female L. buyphradi sp. nov. is difficult to distinguish from those of the L. kaengkhoi sp. nov., L. champakpheaw sp. nov., L. hintung 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-2017-139; Fig. 10A, B ). Coloration (in alcohol): carapace brown with black stripe along the margins; abdominal tergite olive green, except on the white posterior margins; membranous parts of the opisthosoma cream colored with black mottled spots; chelicerae olive green, paler on the proximal part; palp and legs olive green, without distinct annulation.

Palp (Fig. 11A-D ): tibial apophysis round, carrying one long slender and three tapering megaspines; paracymbium round but flat, dark patch with spicules isolated by a pale band; cumulus plane, bearing long black bristles; subtegulum without apophysis; contrategulum without apophysis, distal edge of contrategulum narrow with a depression leading to the oblique conical dorsal apex; tegulum large, axe-blade shaped, possessing a long ridge on the surface, indistinctly separated from the contrategulum, proximal margin with arched, moderately dentate edge, distal margin oblique with moderately apophysis; pigmental bridge between tegulum and contrategulum distinct; paraembolic plate round, as long as wide, project into scale like-plate; embolus proper: sclerotized part with two longitudinal ridges reaching to the tip.

Measurements: Total length 15.60; carapace 7.80 long, 7.28 wide; opisthosoma 8.19 long, 7.02 wide; ocular tubercle 1.04 long, 1.04 wide; palpal coxa 2.10 long, 1.17 wide; labium 0.72 long, 1.44 wide; sternum 3.92 long, 2.16 wide (1.02 on ventral surface); palp 12.48 long (4.14 + 2.34 + 3.90 + - + 2.10); leg I 20.88 long (6.06 + 3.00 + 4.26 + 5.22 + 2.34); leg II 22.62 long (6.24 + 3.12 + 5.16 + 7.14 + 2.64); leg III 24.66 long (6.60 + 3.12 + 5.16 + 7.14 + 2.64); leg IV 31.44 long (8.22 + 3.30 + 6.54 + 9.66 + 3.72).

Female (Allotype: ARA-2017-140; Fig. 10C, D ). Coloration (in alcohol): carapace orange with black marking behind the ocular tubercle and on the peripheral area of the thoracic region; abdominal tergites black, except on the white posterior margins; membranous part of the opisthosoma cream colored with black mottled spots; chelicerae orange, paler at the proximal part; palp and leg femora to metatarsi orange, distal part of metatarsi I-III with black mottled marking, tarsi I-III black, tarsi IV orange with black annulations on the proximal and distal parts.

Vulva (Fig. 12E, F ): vulva plate almost round; genital atrium with lateral hairs; posterior stalk narrow, V-shaped; pore plate quadrangular slightly wider than long; lateral margins thickened, projected into a lip, bearing moderate anterolateral lobes; anterior margin arched, thickened, not projected into a lip; receptacular cluster racemose; central dorsal opening wide.

Measurements: Total length 24.70; carapace 10.66 long, 8.97 wide; opisthosoma 12.35 long, 8.84 wide; ocular tubercle 1.04 long, 1.04 wide; palpal coxa 3.24 long, 2.88 wide; labium 1.16 long, 2.48 wide; sternum 5.36 long, 2.80 wide (1.76 on ventral surface); palp 16.90 long (5.80 + 3.40 + 3.90 + - + 3.80); leg I 20.20 long (6.90 + 3.90 + 4.00 + 3.50 + 1.90); leg II 20.40 long (6.60 + 3.80 + 4.10 + 4.10 + 1.80); leg III 22.30 long (6.80 + 4.00 + 4.10 + 5.00 + 2.40); leg IV 30.80 long (8.40 + 4.20 + 6.10 + 8.20 + 3.90).

Etymology.

The specific epithet buyphradi is dedicated to Mr. Phuri Buyphrad for providing information on the type locality of the new species.

Distribution.

Known only from the type locality.

Comment.

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

Figures

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

Figure 10. Liphistius buyphradi sp. nov. A, B male ARA- 2017 - 139 (holotype) C, D female, ARA- 2017 - 140 (allotype) A, C dorsal view B, D lateral view. Scale bar: 10 mm.

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).