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

description: Bolostromus primus new species
Figs 53–55, map 2
Type material. Holotype male from Ecuador, Los Ríos Province, Centro Cientifico Rio Palenque (00°54’S 79°00’W) 14 Sept. 1979, T. Devries (QCAZ). Paratypes: from Ecuador, Los Ríos Province, 1J, Centro Cientifico Rio Palenque (00°54’S 79°00’W), II.1980, bosque primario, Sandoval (QCAZ); 1J, 29 Dec. 1980, bosque primario, colleción MAB, UNESCO, S. Sandoval (QCAZ); 1J, CC Rio Palenque (00°54’S 79°00’W) 220m, 2 Feb. 1977, bosque primario, T. Devries (QCAZ); 1J, CC Rio Palenque (00°54’S 79°00’W) 220m, 27 Feb. 1977, bosque primario, T. Devries (QCAZ).
Etymology. The specific name is a Latin adjective, meaning primary seeing that the species was collected in a primary forest.
Diagnosis. Male most resemble B. losrios n. sp. but are distinguished from all species by the combination of the following characters: carapace rugose, sternum strongly reticulate (Fig. 54A, B) and embolus with sinuous tip (Fig. 55D).
Description. Male (holotype): Total length: 3.86; carapace length: 1.92; carapace width: 1.46; carapace height: 0.77; abdomen length: 1.76. CEPHALOTHORAX: Carapace hexagonal, wider medially, margin sinuous; pars cephalica dark reddish-orange, rugose; pars thoracica reddish-orange, rugose; cephalic groove well defined, with pit medially; fovea broad, slightly procurved (Fig. 54A); caput slightly elevated (Fig. 54C). Clypeus height: 0.05. Sternum elongated 1.08/0.89, reddish-orange, reticulated; posterior sigilla oval, median and anterior sigillae inconspicuous (Fig. 54B). Labium dark reddish-orange without cuspule. Endites quadrangle; dark reddish-orange without cuspules; serrula not observed. Chelicerae dark reddish; promargin three teeth, denticles not observed; rastrellum with five spines. EYES: AME: 0.12; ALE: 0.13; PME: 0.01; PLE: 0.10; interdistances: AME: 0.03; AME-ALE: 0.08; PME: 0.31; PME-PLE: touching; LE: 0.02; ocular quadrangle: 0.49/0.49/0.20. ABDOMEN: Oval, dorsally dark gray, ventrally light gray (Fig. 53A, B). Spinnerets: median: 0.12; lateral spinnerets: 0.24/0.14/0.20. LEGS: Light orange-brown except for femur I–II darker reddish-orange. Coxae I–II without inner short stiff setae. Metatarsi I with short, apical scopulae (Fig. 54D); metatarsi II without scopula, tarsi I–II with thick complete scopulae (Fig. 54D); III–IV no scopulae. Tarsal claw teeth (1/5) (2/7) (1/0) (1/3). LEGS MEASUREMENTS: I 5.15 (1.50/0.58/1.32/0.97/0.78); II 4.60 (1.37/0.55/1.19/0.79/0.70); III 3.28 (0.99/0.36/0.54/0.78/0.61); IV 5.16 (1.48/0.6 2/1.26/1.10/0.70); leg formula: 4123. LEGS SPINATION: femur I–III (0) IV 2d, with 11 grouped pro-apical spines; patellae I, II, IV (0); III 10p, 2r; tibia I 3v, II 1p, 1-1-1v, 2vap; III 1d, 2p, 1v, 2vap; IV 2vap; metatarsus I 1v, 1vap; II 1-1v, 2vap; III 1-1v, 2vap, 2r, 1-1-1-2d, 1p; IV 1-1v, 2vap; tarsus I-IV (0). GENITALIA: Palp measurements: 0.88/0.41/0.68/0.38; bulb 0.35/0.20. Palpal tibia wider basally; cymbium with four spines apically (Fig. 55A, B); bulb globose; embolus short, apex sinuous (Fig. 55C–E).
Female: Unknown.
Distribution. Only found at the type locality in Los Ríos Province, Ecuador.
Natural history. Specimens were collected in a primary lowland tropical forest.
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 67-70, DOI: 10.11646/zootaxa.5317.1.1, http://zenodo.org/record/8153783