Crassignatha thamphra Y. Lin & S. Li, 2020

Li, Ya, Lin, Yucheng & Li, Shuqiang, 2020, A review of Crassignatha (Araneae, Symphytognathidae), ZooKeys 988, pp. 63-128 : 63

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Crassignatha thamphra Y. Lin & S. Li

sp. nov.

Crassignatha thamphra Y. Lin & S. Li sp. nov. Figs 32 View Figure 32 , 38 View Figure 38

Type material.

Holotype ♀ (IZCAS-Ar 41035), Thailand: Khon Kaen Province, Phu Pha Man District, Phu Pha Man Subdistrict, Tham Phra Cave (16.66603°N, 101.89623°E; 262 m), 10.XI.2016, H. Zhao, Y. Li and Z. Chen leg.; 1♀ (NHMSU-HA089) used for sequencing, GenBank: MT992003, same data as for preceding.


This species differs other Crassignatha species, except C. yinzhi , by the copulatory ducts diagonally connected to the copulatory opening and not fused before reaching copulatory opening. It can be easily distinguished from C. yinzhi by the larger spermathecae separated by less than their diameter and the tighter turns of the copulatory ducts at center of the vulva (Fig. 32G View Figure 32 vs. Fig. 37G View Figure 37 ).


Female (holotype). Total length 0.64. Carapace 0.32 long, 0.32 wide, 0.28 high. Clypeus 0.10 high. Sternum 0.20 long, 0.20 wide. Abdomen 0.44 long, 0.48 wide, 0.48 high. Length of legs: I 0.92 (0.28, 0.12, 0.20, 0.16, 0.16); II 0.74 (0.22, 0.10, 0.14, 0.12, 0.16); III 0.64 (0.16, 0.10, 0.12, 0.12, 0.14); IV 0.84 (0.24, 0.12, 0.18, 0.12, 0.18).

Somatic characters (Fig. 32A-C View Figure 32 ). Coloration: prosoma yellowish brown. Legs dark brownish. Abdomen black with faint, sclerotized dots. Prosoma: carapace nearly pear shaped, surface indistinctly textured. Cephalic area elevated. ALE slightly protruded. PER straight. Chelicerae bears sparse, short setae anteriorly. Labium tongue shaped. Sternum heart shaped, slightly plump, surface smooth, truncated posteriorly. Legs: covered with setae and bristles. Abdomen: abdominal shape irregular and surface rugose (caused by alcohol immersion). Spinnerets weakly sclerotized.

Epigyne (Fig. 32D-G View Figure 32 ): epigynal area slightly sclerotized, bears a few long setae. Scape protruded, longer slightly than wide. Internal structures faintly visible via translucent tegument. Spermathecae separated by ~ ½ their diameter. Fertilization ducts thin, slender, originating from posteromedial margin of spermathecae, forming a U-shape. Copulatory ducts long, connected to the posterior surface of spermathecae, curving twice below spermathecae, linked diagonally, and fused to copulatory opening.

Male. Unknown.


The specific name is derived from the type locality; noun in apposition.


Thailand (Fig. 38 View Figure 38 ).