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

description: Bolostromus stridulator new species
Figs 59–61, map. 2
Type material. Holotype male from Ecuador, Cotopaxi Province, OTONGA Biological Reserve (-00.41433 - 79.00035) 1888m, 24 May–8 June 2014, pitfall trap, E. Tapia, A. Tapia, C. Tapia, N. Dupérré (QCAZ). Paratype: male, same data as holotype (QCAZ).
Etymology. The specific name is a non-Latin noun (invariable), in reference to the stridulatory organ found on the chelicerae.
Diagnosis. Males are distinguished from all species by the combination of the following characters: the presence of striduatory keels on the inner side of the chelicerae (Fig. 60D); carapace reticulate (Fig. 60A) and palp with short embolus with tip strongly bent (Fig. 61D).
Description. Male (holotype): Total length: 2.03; carapace length: 1.12; carapace width: 0.88; carapace height: 0.43; abdomen length: 0.91. CEPHALOTHORAX: Carapace elongated hexagonal, margin sinuous; light yellow-brown; pars cephalica and pars thoracica reticulate; fovea short, slightly procurved, cephalic groove broad and shallow (Fig. 60A); caput elevated, ocular quadrangle on a mound (Fig. 60C). Clypeus 0.04. Sternum 0.68/0.56, yellow, reticulate; sigillae inconspicuous (Fig. 60B). Labium yellow without cuspule. Endites quadrangle, yellow with 1/2 cuspules (right/left side); serrula not observed. Chelicerae light brown; medially with 3–4 reticulated stridulatory keel (Fig. 60D); promargin with two double large teeth, four small teeth and six denticles; rastrellum with five spines. EYES: AME: 0.06; ALE: 0.09; PLE: 0.06; PME: 0.04; interdistances: AME: 0.02; AME-ALE: touching; PME: 0.09; PME-PLE touching; LE touching; ocular quadrangle: 0.26/0.26/0.12. ABDOMEN: Oval; light gray witha meshy pattern; ventrally uniformly beige (Fig. 59A, B). Spinnerets: median spinnerets: 0.10; lateral spinnerets: 0.20/0.15/0.17. LEGS: Light yellow-brown; metatarsi I–II with thin apical scopulae (Fig. 60E); tarsi I–II with complete scopulae (Fig. 60E); legs III–IV without scopulae. Coxae I–II without inner short stiff setae. Tarsal claws (2/4) (2/1) (0/0) (0/0). LEGS MEASUREMENTS: leg I 3.37 (1.01/0.45/0.79/0.58/0.54); II 2.88 (0.81/0.42/ 0.66/0.49/0.50); III 2.10 (0.62/0.27/0.34/0.41/0.46); IV 3.32 (0.95/0.45/0.79/0.64/0.49); leg formula: 1423. LEGS SPINATION: femur I (0) II–IV 1d; femur IV with 6 grouped pro-apical spines; patellae I, II, IV (0); III with 5p; tibia I 1-1v; II 1-1v; III 1d, 2vap; IV 1-1v, 2vap; metatarsus I (0); II 1-1v; III 1p, 1-2d, 1vap, 1r; IV 1-1v, 2vap; tarsus I-IV (0). GENITALIA: Palp measurements: 0.49/0.24/0.42/0.25/; bulb: 0.25/0.13. Palp: fermur slightly longer than tibia, palpal tibia wider basally; palpal cymbium with three apical spines (Fig. 61A, B); bulb elongated; embolus tip strongly bent (Fig. 61C–E).
Female: Unknown.
Distribution. Only known from the type locality in Cotopaxi Province, Ecuador.
Natural history. The only two males were collected by pitfall at 1888m in a evergreen foothill forest of the Ecuadorian Chocó region.
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 74-75, DOI: 10.11646/zootaxa.5317.1.1, http://zenodo.org/record/8153783