Bolostromus fonsecai Dupérré 2023, new species
Creators: name: Dupérré, Nadine
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Cyrtaucheniidae
Bolostromus
Bolostromus fonsecai

description: Bolostromus fonsecai new species
Figs 62–64, map. 2
Type material. Holotype male from Ecuador, Napo Province, Bloque 31 Puzo Nashiño (-0.615325 -75.876618) 237.33m, 03.XII.1997, R. Fonseca (QCAZ).
Etymology. The specific name is in honor of the memory of René M. Fonseca, an Ecuadorian mammologist who collected the type specimen.
Diagnosis. Males resemble B. nischki n. sp. and B. epiphyticus n. sp. but can be distinguished from all species by the combination of the following characters: tibia I with five small spines (Fig. 63D), while B. nischki n. sp. tibia I has two spines (Fig. 45D), and B. epiphyticus n. sp. has numerous larges spines on tibia I (Fig. 42D).
Description. Male (holotype): Total length: 10.08; carapace length: 5.03; carapace width: 3.86; carapace height: 2.46; abdomen length: 5.05. CEPHALOTHORAX: Carapace elongated hexagonal, margin sinuous; pars cephalica dark brown, rugose; pars thoracica lighter brown, smooth; cephalic groove well defined, pit medially; fovea broad, procurved (Fig. 63A); caput elevated; ocular quadrangle not on mound (Fig. 63C). Clypeus height: 0.3. Sternum 2.81/2.04, dark brown and rugose; posterior sigilla oval, anterior and median sigillae rounded (Fig. 63B). Labium short, reddish-brown without cuspule. Endites reddish-brown with 23 small cuspules; serrula not observed. Chelicerae dark reddish-brown; promargin seven teeth and 15 denticles; rastrellum with 12 spines. EYES: AME: 0.26; ALE: 0.36; PLE: 0.2; PME: 0.13; interdistances: AME: 0.11; AME-ALE: 0.1; PME: 0.62; PME-PLE: touching; LE: 0.11; ocular quadrangle: 1.23/1.19/0.57. ABDOMEN: Oval; dorsally light gray, ventrally beige (Fig. 62A, B). Spinnerets: median: 0.5; lateral: 0.68/0.63/0.88. LEGS: Legs yellow-brown; metatarsi I–II straight with dense, 1/3 apical scopulae; tarsi I–II with dense, full scopulae (Fig. 63D); leg III–IV without scopulae. Coxae II–II without long stiff setae interiorly. Tarsal claw teeth (4-3/6-7) (4/6) (3-3/4-5) (3/4). LEGS MEASUREMENTS: I 16.37 (4.76/2.05/3.75/3.59/2.22); II 13.44 (4.12/1.62/3.15/2.62/1.93); III 10.30 (3.14/1.60/1.64/2.31/1.61); IV 14.98 (4.48/1.56/3.83/3.22/1.89); leg formula: 1423. LEGS SPINATION: (legs missing some spines): femur I–III (0); 11 grouped pro-apical spines; patellae I, II, IV (0); III with 24p, 3d, 2r; tibia I 1-1-2-1v, 1vap, 1r; II 1-1v, 2p; III 4p, 1-1-1-1d, 1v, 2vap, 2r; IV 1-1v, 2vap; metatarsus I (0); II 1-2-1-2, 3vap, 2r, 1p; III 2p, 1- 2-2-1-1-3d; 1-2-1- 2v, 3vap, 1-1-1rap; IV 1d; 1-2-1-1-1v, 4vap, 4p, 2r; tarsus I (0); II 7r; III 4r, 22v; IV 12r, 12p, 23v. GENITALIA: Palp measurements: 3.51/1.51/2.79/0.93; bulb: 0.90/0.45. Palp: femur longer than tibia; tibia straight, two spines prolaterally; cymbium with 10 apical spines (Fig. 64A, B); bulb globose; embolus short, slightly sinuous apically (Fig. 64C–E).
Female: Unknown.
Distribution. Only known from the type locality in Orellana Province, Ecuador.
Natural history. The specimen was collected in Amazonian region, bloque 31. Eventhough the label mentions the Napo Province, bloque 31 is a famous petrol region situated in Yasuní Nation Park in Orellana province.
description: Published as part of Dupérré, Nadine, 2023, Review of the American genus Bolostromus Ausserer, 1875 with the description of fourteen new species (Araneae, Cyrtaucheniidae), pp. 1-88 in Zootaxa 5317 (1) on pages 78-81, DOI: 10.11646/zootaxa.5317.1.1, http://zenodo.org/record/8153783