Difference between revisions of "Crassignatha baihua"
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Latest revision as of 19:30, 6 November 2020
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Ordo: Araneae
Familia: Symphytognathidae
Genus: Crassignatha
Name
Crassignatha baihua Y. Lin & S. Li sp. nov. – Wikispecies link – ZooBank link – Pensoft Profile
Type material
Holotype ♂ (NHMSU Ar 001) and paratypes 3♂ 8♀ (NHMSU Ar 002–012), China: Yunnan Province, Longling County, Mangkuan Township, Zaotanghe at Baihua Ling (Flowers Ridge) Village, in leaf litter under undisturbed subtropical broadleaf forest (25.30450°N, 98.80059°E; 1635 m), 21.VIII.2018, Y. Lin et al. leg. 1♂ (NHMSU-HA109) and 1♀ (NHMSU-HA109) used for sequencing, GenBank: MT992007 and MT992006, same data as for preceding.
Other material examined
1♂ 13♀ (NHMSU-HA110), same data as holotype; 1♂ 2♀ (NHMSU-HA104), China: Yunnan Province, Nujiang Prefecture, Fugong County, Shiyueliang Township (27.27012°N, 98.89803°E; 1647 m), 5.VII.2016, Y. Li leg.
Diagnosis
Crassignatha baihua sp. nov. is similar to C. quadriventris but can be distinguished by the short, rigid, distally flat embolus (Fig. 2A) and the long copulatory ducts that make four turns before reaching the copulatory opening (Fig. 2F, G).
Description
Male (holotype). Total length 0.64. Carapace 0.32 long, 0.32 wide, 0.36 high. Clypeus 0.10 high. Sternum 0.24 long, 0.20 wide. Abdomen 0.44 long, 0.44 wide, 0.48 high. Length of legs: I 0.94 (0.20, 0.10, 0.28, 0.16, 0.20); II 0.84 (0.16, 0.10, 0.24, 0.14, 0.20); III 0.60 (0.10, 0.06, 0.14, 0.12, 0.18); IV 0.68 (0.14, 0.06, 0.18, 0.10, 0.20).
Somatic characters (Fig. 1A–C). Coloration: carapace, sternum, chelicerae, endites, and labium dark brown. Abdomen light black, with numerous small, sclerotized patches, with single orange scutum laterally and posteriorly. Prosoma: carapace nearly pear shaped, surface granular, with two setae medially. Cephalic region elevated. PER strongly recurved. Chelicerae covered with setae anteriorly. Sternum almost heart shaped, rough, slightly swollen, truncated posteriorly, surface rough. Legs: light brown, covered with setae and bristles. Tibia II with two clasping spurs. Abdomen: anteriorly round, posteriorly square. Dorsally with pale yellow speckles, lateral scutum present, bears sparse, long setae. Spinnerets light brown, with circular plate.
Palp (Fig. 2A–C): bulb relatively large, ~½ size of carapace. Cymbium bears apical setae, cymbial tooth hooked. Tegulum smooth, globular. Median apophysis nearly square, with a prolateral-distal process. Embolic membrane arises between median apophysis and embolus. Embolus short, rigid, distally blunt, forming a torsion. Female (one of the paratypes). Total length 0.96. Carapace 0.36 long, 0.36 wide, 0.36 high. Clypeus 0.10 high. Sternum 0.24 long, 0.24 wide. Abdomen 0.64 long, 0.64 wide, 0.72 high. Length of legs: I 1.30 (0.42, 0.14, 0.30, 0.20, 0.24); II 1.06 (0.30, 0.14, 0.24, 0.16, 0.22); III 0.70 (0.18, 0.08, 0.20, 0.08, 0.16); IV 1.02 (0.30, 0.14, 0.24, 0.14, 0.20).
Somatic characters (Fig. 1D–F). Coloration: carapace, sternum, chelicerae, endites, and labium dark brown. Abdomen black, with numerous small sclerotized patches. Prosoma: carapace nearly pear shaped with small tubercles, with two strong setae medially. Cephalic region elevated. PER straight. Mouthparts and sternum as in male. Abdomen: anteriorly rounded, posteriorly square, with paired posterolateral small tubercles. Spinnerets as in male, circular plate absent.
Epigyne (Fig. 2D–G): epigynal area weakly sclerotized, with some setae. Scape distinctly extends beyond the epigastric furrow. Internal structures more or less visible via translucent tegument. Spermathecae separated by 1.2× their diameter. Fertilization ducts starting at posterior of spermathecae. Copulatory ducts long, connected to dorsal surface of spermathecae, forming four turns before curving downward. Subproximal copulatory ducts parallel, throughout the entire scape. Copulatory opening located at end of scape.
Etymology
The specific epithet is derived from the type locality; noun in apposition.
Distribution
China (Yunnan) (Fig. 38).
Original Description
- Li, Y; Lin, Y; Li, S; 2020: A review of Crassignatha (Araneae, Symphytognathidae) ZooKeys, 988: 63-128. doi
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