Brignoliella besutensis Lin, Li & Jaeger , 2012

Lin, Yucheng, Koh, Joseph K. H., Koponen, Seppo & Li, Shuqiang, 2017, Taxonomic notes on the armored spiders of the families Pacullidae and Tetrablemmidae (Arachnida, Araneae) from Singapore, ZooKeys 661, pp. 15-60 : 20-22

Brignoliella besutensis Lin, Li & Jaeger, 2012 Figs 10, 11, 12

Brignoliella besutensis Lin et al., 2012: 56, figs 1 A–F, 2 A–C, 3 A–C (male) from Malaysia.

Material examined.

1♂ and 8♀ (NHMSU), SINGAPORE: Pulau Ubin, altitude 2 m, 1°25'18.0"N, 103°56'25.4"E, 22 August 2015, S. Li and Y. Tong leg.

Diagnosis.

Brignoliella besutensis is similar to Brignoliella caligiformis Tong & Li, 2008 from Hainan Island, China (see Tong, 2013: 76, fig. 91 A–G), but male can be distinguished by the non-inflated palpal tibia, the pear-shaped bulb, the horn-shaped embolus, and the slightly sinuous course of the spermatic duct (Fig. 11 A–B, also see Lin et al., 2012: fig. 2 A–C vs. Tong, 2013: fig. 91 F–G). Female distinguished by the straight postgenital scutum (Fig. 12 A–D vs. Tong, 2013: fig. 91 D–E), the larger, adjacent pits of the preanal scutum (Fig. 12 B–D vs. Tong, 2013: fig. 91 D–E), the narrower lateral horn and the flatter vulval stem (Fig. 12C vs. Tong, 2013: fig. 91E).

Description.

Male. Coloration: body reddish-brown; legs pale reddish-brown to yellowish-brown.

Measurements: total length 1.16; carapace 0.58 long, 0.48 wide, 0.47 high; abdomen 0.72 long, 0.56 wide, 0.48 high; clypeus 0.16 high; sternum 0.32 long, 0.32 wide. Length of legs: I 1.25 (0.40, 0.14, 0.28, 0.21, 0.22); II 1.14 (0.36, 0.13, 0.25, 0.19, 0.21); III 1.01 (0.30, 0.12, 0.21, 0.19, 0.19); IV 1.29 (0.40, 0.13, 0.30, 0.26, 0.20).

Prosoma (Fig. 10 A–B, E, G): carapace strongly sclerotized; cephalic part smooth, slightly raised, with two rows of wart-like knots behind ocular area; thoracic part irregularly reticulated, margin rugose and denticulate; ocular area situated anteriorly, with six eyes in three diads, PME absent, ALE>AME=PLE in eye size. Clypeus with few wart-like knots, clypeal horn short, distally bifid; chelicerae surface smooth, with a fronto-mesial, short cheliceral apophysis, cheliceral lamina developed, translucent. Endites basally wide, distally narrow; labium distally blunt, subtriangular. Sternum long same as wide, with relatively large wart-like knots, marginally crinkled. Legs with lateral veins.

Opisthosoma (Fig. 10 A–B, G): dorsal scutum oval, with sparse small pits, setae inserted in pits; ventral scutum anteriorly slightly crinkled, posteriorly with pits, booklung cover smooth; lateral scutum I long; postgenital scutum present, preanal scutum rectangular and smooth.

Palp (Fig. 11 A–B): femur ventrally granulated, with three long setae; patella almost half as long as tibia, without modification; tibia slightly bent, with a distal-dorsal trichobothrium; cymbium subtriangular in lateral view; bulb pear-shaped; spermatic duct course simple; embolus short, sclerotized, distinctly narrowed and slightly bent distally, horn-shaped.

Female (First description). Coloration: same as in male.

Measurements: total length 1.18; carapace 0.56 long, 0.48 wide, 0.46 high; abdomen 0.84 long, 0.64 wide, 0.52 high; clypeus 0.12 high; sternum 0.33 long, 0.34 wide. Length of legs: I 1.22 (0.40, 0.14, 0.26, 0.20, 0.22); II 1.14 (0.36, 0.13, 0.24, 0.20, 0.21); III 0.98 (0.30, 0.12, 0.19, 0.20, 0.17); IV 1.26 (0.39, 0.13, 0.28, 0.24, 0.22).

Prosoma (Fig. 10 C–D, F, H) as in male, but lacking clypeal horn and cheliceral apophysis, and clypeus lower than in male. Legs also as in male.

Opisthosoma (Figs 10 C–D, H; 12 A–B): dorsal and ventral scuta as in male; lateral scutum I short, and not exceeding anterior margin of preanal scutum; postgenital scutum straight, slightly wider than preanal scutum; preanal scutum trapezoidal, with two large grooves at anterolateral corners (Fig. 12 A–B).

Genitalia (Fig. 12 C–D): epigynal fold distinct; epigynal pit and vulval stem forming into a sclerotized ring; central process and inner vulval plate absent; lateral horn and vulval duct weak, connected to the translucent, saccular seminal receptaculum (Fig. 12C).

Distribution.

Malaysia, Singapore.