Crassignatha nantou Y. Lin & S. Li, 2020

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

publication ID	https://dx.doi.org/10.3897/zookeys.988.56188
publication LSID	lsid:zoobank.org:pub:6E64D69B-DD73-4A7E-AE2B-3CD21247A5E3
persistent identifier	https://treatment.plazi.org/id/B01CEA82-FFB1-41DD-919C-6AC0B8D0EF59
taxon LSID	lsid:zoobank.org:act:B01CEA82-FFB1-41DD-919C-6AC0B8D0EF59
treatment provided by	ZooKeys by Pensoft
scientific name	Crassignatha nantou Y. Lin & S. Li
status	sp. nov.

Treatment

Crassignatha nantou Y. Lin & S. Li sp. nov. Figs 14 View Figure 14 , 15 View Figure 15 , 38 View Figure 38

Type material.

Holotype ♂ (IZCAS-Ar 41012) and paratypes 17♀ (IZCAS-Ar 41013-41029), China: Taiwan Province, Nantou County, Ren’an Township, Hehuan Mountain, Yuanfeng Peak (24.11780°N, 121.23731°E; 2757 m), 2.VII.2013, S. Li and G. Zheng leg.; 1♂ (NHMSU-HA055) and 1♀ (NHMSU-HA055) used for sequencing, GenBank: MT991996 and MT991995, same data as for preceding.

Diagnosis.

Crassignatha nantou sp. nov. differs from other congeners, except C. shunani sp. nov., by the long, spiral embolus with a sharp, narrow tip and the separate bases of copulatory ducts (Fig. 15A, B, F, G View Figure 15 ). It is similar to C. shunani sp. nov. by the shape of the male palp and vulva, but the male can be distinguished by having a blunt cymbial tooth and a hook on the median apophysis vs. a sharp cymbial tooth and lack of a hook in the latter (Figs 15A View Figure 15 , 29A View Figure 29 ); the female differs by the closer spermathecae and larger copulatory opening (Figs 15F, G View Figure 15 , 29F, G View Figure 29 ).

Description.

Male (holotype). Total length 0.80. Carapace 0.36 long, 0.36 wide, 0.40 high. Clypeus 0.20 high. Sternum 0.24 long, 0.24 wide. Abdomen 0.52 long, 0.40 wide, 0.60 high. Length of legs: I 1.34 (0.42, 0.14, 0.32, 0.20, 0.26); II 1.10 (0.32, 0.12, 0.26, 0.16, 0.24); III 0.80 (0.22, 0.10, 0.16, 0.12, 0.20); IV 1.02 (0.32, 0.12, 0.22, 0.12, 0.24).

Somatic characters (Fig. 14A-C View Figure 14 ). Coloration: carapace, sternum, chelicerae, endites, and labium dark brown. Abdomen blue-green with irregular sclerotized patches. Prosoma: carapace nearly rounded, surface granular, with small sulci. Cephalic region strongly elevated. ALE protruded, PER recurved. Clypeus concave. Chelicerae covered with setae anteriorly. Labium semilunar, fused to sternum. Sternum heart shaped, flat, surface rough, truncated posteriorly. Legs: tibia II with one clasping spur. Abdomen: sub-elliptic dorsally, with lateral scuta. Spinnerets weakly sclerotized, with a circular plate.

Palp (Fig. 15A-C View Figure 15 ): pale, weakly sclerotized. Cymbium large, with a few setae distally, cymbial tooth near distal margin. Tegulum large, smooth, and plump. Median apophysis disciform, with a hooked process on margin. Embolic membrane slender, laminar, translucent, arises near anterior part of median apophysis. Embolus long, flexible, spiraled, and wide basally, narrow distally.

Female (one of paratypes). Total length 1.08. Carapace 0.44 long, 0.40 wide, 0.40 high. Clypeus 0.16 high. Sternum 0.28 long, 0.28 wide. Abdomen 0.68 long, 0.60 wide, 0.80 high. Length of legs: I 1.68 (0.58, 0.16, 0.42, 0.24, 0.28); II 1.38 (0.46, 0.14, 0.34, 0.22, 0.22); III 1.00 (0.28, 0.12, 0.22, 0.16, 0.22); IV 1.24 (0.42, 0.14, 0.26, 0.18, 0.24).

Somatic characters (Fig. 14D-F View Figure 14 ). Coloration: prosoma as in male. Abdominal color lighter than in male, dorsum lighter than venter. Prosoma: carapace nearly pear shaped, sculptured, and granular. Cephalic region lower than in male. PER slightly recurved. Chelicerae fused near base, covered with setae anteriorly. Labium subtriangular, fused to sternum. Sternum as in male. Abdomen: nearly globular dorsally, surface modified by sclerotized dots. Spinnerets weakly sclerotized, with a circular plate.

Epigyne (Fig. 15D-G View Figure 15 ): epigynal area lightly sclerotized, with setae on lateral margins. Scape short, wide, copulatory opening located at its terminus, split into two labella. Internal structures more or less visible via translucent tegument. Paired spermathecae globose, separated by half their diameter. Fertilization ducts thin, starting at inside central margin of spermathecae, bent downward, twisted, and furcate at end. Copulatory ducts thick, connected to posterior margin of spermathecae, passing under the spermathecae, up into the center of vulva, deflexed to copulatory opening, their proximal base unfused.

Etymology.

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

Distribution.

China (Taiwan) (Fig. 38 View Figure 38 ).