Bolostromus busu, Dupérré, 2023

Dupérré, Nadine, 2023, Review of the American genus Bolostromus Ausserer, 1875 with the description of fourteen new species (Araneae, Cyrtaucheniidae), Zootaxa 5317 (1), pp. 1-88 : 18-21

Bolostromus busu new species

Figs 11 , 12 , map 1

Type material. Female holotype from Dominican Republic, Mt-Busú, Sierra Martín Gracía, 18N 71W, 1983, G. Flores, A. Gross, E slope, 300–1300m, 25.ii.1983 ( MCZ 70781 ) .

Etymology. The specific name is a noun in apposition taken from the type locality Mt-Busú, Dominican Republic.

Diagnosis. Females most resembles B. epiphyticus n. sp. but are distinguished from all species by the combination of the following characters: leg I, with black markings ( Fig. 12D ) and internal genitalia with elongated spermathecae with internal, elongated lobes ( Fig. 12E ).

Description. Female (holotype): Total length: 13.10; carapace length: 6.54; carapace width: 5.00; carapace height: 2.80; abdomen length: 6.56. CEPHALOTHORAX: Carapace almost rectangular but wider medially, margin sinuous; pars cephalica dark reddish-brown; pars thoracica light reddish-brown, smooth; cephalic groove not well defined, without pit medially; fovea broad, procurved ( Fig. 12A ); caput strongly elevate ( Fig. 12C ). Clypeus height: 0.18. Sternum elongated 3.55/2.68, dark brown laterally, lighter brown medially and basally, reticulated, posteriorly, smooth; posterior sigillae oval, other sigillae inconspicuous ( Fig. 12B ). Labium dark reddish-brown without cuspule. Endites quadrangle; dark reddish-brown with 18 cuspules; serrula not observed. Chelicerae dark reddish-brown; promargin seven teeth and 31 denticles; rastrellum with 13 spines. EYES: AME: 0.13; ALE: 0.29; PLE: 0.18; PME: 0.1; interdistances AME-AME: 0.14; AME-ALE: 0.1; PME: 0.65; PME-PLE: 0.45; LE: 0.12; ocular quandangle: 1.15/1.2/0.46. ABDOMEN: Oval, uniformly dark gray dorsally and ventrally ( Fig. 11A, B ). Spinnerets: median spinnerets: 0.67; lateral spinnerets: 1.3/0.99/1.22. LEGS: Uniformly orange-brown except femur I with black mark apico-retrolaterally and prolaterally; patellae with black longitudinal band retro and prolaterally; tibia and metatarsi with black bands retrolaterally and prolaterally; tarsi uniformly brown; leg II femur with black mark apico-retrolaterally and prolaterally. Coxae I–II without inner short stiff setae. Metatarsi I with thick, almost complete scopulae ( Fig. 12D ); metatarsi II with apical scopulae; tarsi I–II with thick complete scopulae ( Fig 12A ); III–IV without scopulae; palpal tarsi with thick apical scopulae. Tarsal claw teeth (6/8) (6/7) (5/5) (4/4). LEGS MEASUREMENTS: I 15.34 (4.83/2.49/3.56/2.70/1.76); II 13.43 (4.23/1.99/3.13/2.46/1.62); III 10.06 (3.36/1.37/1. 65/2.07/1.61); IV 15.73 (4.80/2.12/3.92/3.15/1.74); leg formula: 4123. LEGS SPINATION: femur I–III (0); IV with 7 grouped pro-apical spines; patellae I, II, IV (0); III with 13p, 2r; tibia I, II 1-1-1v, 1vap; III 2-1v, 2vap, 1p, 1d, 1r; IV 2-2v, 2vap, 2r; metatarsus I 1-2-1v, 2vap; II 1-2-2-1v, 3vap; III 2-2v, 2vap, 1p, 1-1-1-2-1-1d, 1r; IV 2r, 1-2- 2-1-2v, 3vap; tarsus I (0); II 3v; III 2-2-2-2-2v; IV 2-2-3-2v, 6r, 13p. GENITALIA: Spermathecae elongated, with elongated, internally positioned lobes ( Fig. 12E ).

Male. Unknown.

Distribution. Only found at the type locality in Dominican Republic.

Figures

MAP 1. Distribution map of Bolostromus in Central America and Northern South America. Bolostromus laheredia n. sp. (turquoise circle), B. panamanus (Petrunkevitch, 1925) (blue star), B. holguinensis Rudloff, 1996 (green star), B. busu n. sp. (red circle), B. insularis (Simon, 1892) (pink star), B. pulchripes (Simon, 1889) (red star), B. fauna (Simon, 1889) (black star), Bolostromus venustus Ausserer, 1875 (orange star).

FIGURE 11. Bolostromus busu n. sp. Female holotype. A. Habitus, dorsal view. B. Habitus ventral view. Scale bars: 1.0mm.

FIGURE 12. Bolostromus busu n. sp. Female holotype. A. Carapace, dorsal view. B. Sternum, ventral view. C. Carapace, lateral view. D. Leg I, prolateral view. E. Internal genitalia, dorsal view. Scale bars: 1.0mm.