Bolostromus pristirana, 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 : 60-63

Bolostromus pristirana new species

Fig. 47–49 , map 2

Type material. Male holotype from Ecuador , Cotopaxi Province, Pristirana Reserve (-00.422297 -78.958126) 1397m, 16–26 Feb. 2019, pitfall trap, E. Tapia, Tapia Family ( QCAZ). Paratypes: ECUADOR: Cotopaxi Province: OTONGA Biological Reserve (-00.39506 -78.98100) 1290m, 05–16 2014, 1J, pitfall trap, E.E. Tapia, C. Tapia & N. Dupérré ( ZMH-A0019763 ) .

Etymology. The species name is a noun in apposition taken from the type locality Pristirana reserve.

Diagnosis. Males most resemble B. urku n. sp. in overall coloration but can be distinguished by the large megaspine on tibia I ( Fig. 48D , arrow), fovea procurved ( Fig. 48A ), and palpal bulb globose ( Fig. 49E ) while the later species bears no spines ( Fig. 51D ), fovea almost straight ( Fig. 51A ) and the palpal bulb elongated ( Figs 52E ).

Description. Male (holotype): Total length: 2.81; carapace length: 1.60; carapace width: 1.22; carapace height: 0.64; abdomen length: 1.21. CEPHALOTHORAX: Carapace elongated hexagonal, margin slightly sinuous; pars cephalica dark brown, reticulate; pars thoracica, lighter brown, reticulate; cephalic groove shallow, with pit medially; fovea broad, procurved ( Fig. 48A ); caput not strongly elevated ( Fig. 48C ). Clypeus: 0.06. Sternum not elongated 0.88/0.76, brown, smooth; all sigillae small, oval ( Fig. 48B ). Labium orange-brown basally, beige medio-apically; without cuspule. Endites quadrangle; orange-brown with three cuspules; serrula not observed. Chelicerae dark brown; promargin six teeth and seven denticles; rastrellum with four spines. EYES: AME: 0.07; ALE: 0.11; PLE: 0.08; PME: 0.06; interdistances: AME: 0.06; AME-ALE: 0.01; PME: 0.17; PME-PLE: touching; LE: touching; ocular quadrangle: 0.32/0.39/0.17. ABDOMEN: Oval; dorsally beige with a dark pattern consisting of three chevrons posterior half; ventrally uniformly beige ( Fig. 47A, B ). Spinnerets: median spinnerets: 0.19; lateral spinnerets: 0.21/0.12/0.17. LEGS: Uniformly light brown. Coxae I–II without inner short stiff setae. Tibia I with one straight megaspine ( Fig. 48D ); legs I–IV without scopulae. Tarsal claw teeth (3/4) (4-5/6) (4/5) (3- 5/5). LEGS MEASUREMENTS: I 3.65 (1.15/0.45/0.81/0.70/0.54); II 2.93 (0.79/0.45/0.63/0.53/0.53); III 2.08 (0.63/0.29/0.32/0.41/0.43); IV 3.54 (1.03/0.42/0.78/0.77/0.54); leg formula: 1423. LEGS SPINATION: femur I, III (0); II 1d; IV 1-1-6d; patellae I, II, IV (0); III with 7pd; tibia I 1-1v; II 1-1v; III 1p; 1d, 2vap; IV 1-2v, 2vap; metatarsus I 1-1v; II 1-1v, 1vap; III 2p, 1-2-2d; 2vap; 1r; IV 1-1v, 2vap, 1r; tarsus I-III (0); IV 1v. GENITALIA: Palp measurements: 0.72/0.29/0.6/0.26; bulb: 0.41/0.16. Palp: tibia wider basally; cymbium with five apical spines ( Fig. 49A, B ); bulb globose; embolus short, sharply bent apically ( Fig. 49E ).

Female: Unknown.

Distribution. Ecuador, Cotopaxi province.

Natural history. Specimens were collected between 1290–1397m by pitfall in low evergreen forest.

Figures

MAP 2. Distribution map of Bolostromus in Ecuador. Bolostromus devriesi n. sp. (green triangle), B. riveti Simon, 1903 (turquoise star), B. hubeni n. sp. (yellow circle), B. urku n. sp. (green half circle), B. epiphyticus n. sp. (red square), B. pristirana n. sp. (pink losange), B. nischki n. sp. (blue inverted triangle), B. fonsecai n. sp. (black cross), B. primus n. sp. (black rectangle), B. losrios n. sp. (red pentagone), B. stridulator n. sp. (blakc circle), B. valdivia n. sp. (yellow square), B. italoi n. sp. (orange circle), B. gaujoni (Simon, 1889) (yellow star).

FIGURE 47. Bolostromus pristirana n. sp. Male holotype. A. Habitus, dorsal view. B. Habitus ventral view. Scale bars: 0.5mm.

FIGURE 48. Bolostromus pristirana n. sp. Male holotype. A. Carapace, dorsal view. B. Carapace, ventral view. C. Carapace, lateral view. D. Leg I, prolateral view (arrow point to megaspine). Scale bars: 0.5mm.

FIGURE 49. Bolostromus pristirana n. sp. Male holotype.A. Palp, prolateral view. B. Palp, retrolateral view. C. Bulb, prolateral view. D. Bulb, ventral view. E. Bulb, retrolateral view. Scale bars: 0.1mm.

FIGURE 51. Bolostromus urku n. sp. Male holotype. A. Carapace, dorsal view. B. Carapace, ventral view. C. Carapace, lateral view. D. Leg I, prolateral view. Scale bars: 0.5mm.

FIGURE 52. Bolostromus urku n. sp. Male holotype. A. Palp, prolateral view. B. Palp, retrolateral view. C. Bulb, prolateral view. D. Bulb, ventral view. E. Bulb, retrolateral view. Scale bars: 0.1mm.