Crassignatha seedam, Rivera-Quiroz & Petcharad & Miller, 2021

Rivera-Quiroz, Francisco Andres, Petcharad, Booppa & Miller, Jeremy A., 2021, First records and three new species of the family Symphytognathidae (Arachnida, Araneae) from Thailand, and the circumscription of the genus Crassignatha Wunderlich, 1995, ZooKeys 1012, pp. 21-53 : 21

Crassignatha seedam sp. nov. Figures 13 , 15b, d

Material examined.

Holotype: Thailand • ♀ Chiang Mai, Doi Suthep National Park. Montane evergreen forest with pine; 18°48.502'N, 98°53.528'E. 1409 m; July 24-28, 2018. Booppa Petcharad, Jeremy Miller, F. Andres Rivera-Quiroz leg.; direct hand coll.; RMNH.5106640. Male unknown.

Etymology.

The species epithet is a derivation of the Thai Crassignatha seedam (black), in reference to the dark coloration of this species.

Diagnosis.

Crassignatha seedam sp. nov. differs from other Crassignatha species by having a nearly round abdomen instead of triangular or squared, and having the epigynum bulging ventro-posteriorly but not forming an scape (compare Figs 13d and 15b, d to Fig. 12c ; Lin and Li 2009: fig. 10; and Miller et al. 2009 fig. 76d, h).

Description.

Carapace brown with smooth texture (Fig. 13b ). Legs light brown, slightly darker on the distal portion its segments. Abdomen sub-spherical, darker than carapace with sparse light patches (Fig. 13a, b ).

Vulva: Epigynum weakly sclerotized but covered by small dark patches (Fig. 13d ), bulging ventrally. Copulatory openings broad but not forming an atrium (Fig. 15b ). Spermathecae spherical, much more sclerotized than epigynum, separated by 0.5 × their diameter (Fig. 13d ). Copulatory ducts long, coiling over themselves before connecting to S. Fertilization ducts as long as S width, connecting very close to Cd and projecting dorsally (Fig. 15b, d ).

Female: Total length 0.56, carapace 0.28 long, 0.26 wide; clypeus 0.06; Chelicera 0.1 long, 0.07 wide; Leg I: femur 0.3, patella 0.1, tibia 0.22, metatarsus 0.13, tarsus 0.19; leg formula I-II-IV-III; abdomen 0.47 long, 0.41 wide.

Figures

Figure 12. Crassignatha seeliam sp. nov., genitalia. Palp: a ventral view b dorsal view. Epigynum, cleared: c dorsal view d ventral view. Scale bars: 0.1 mm (a, b); 0.07 mm (c, d).

Figure 13. Crassignatha seedam sp. nov. female: Habitus: a ventral view b dorsal view. Epigynum: c ventral view d dorsal view, cleared. Scale bars: 0.3 mm (a, b); 0.1 mm (c, d); 0.05 mm (d).

Figure 15. a, c Patu shiluensis Lin & Li, 2009 b, d Crassignatha seedam sp. nov. Epigynum, cleared: a, b dorsal view c, d ventral view. Scale bars: 0.03 mm (a, c); 0.05 mm (b, d).