Review of the American genus Bolostromus Ausserer, 1875 with the description of fourteen new species (Araneae, Cyrtaucheniidae) Author Dupérré, Nadine 0000-0003-2195-878X n.duperre@leibniz-lib.de text Zootaxa 2023 2023-07-17 5317 1 1 88 http://dx.doi.org/10.11646/zootaxa.5317.1.1 journal article 57758 10.11646/zootaxa.5317.1.1 2ec8e36f-be42-4c2a-b488-0a8640f80ead 1175-5326 8153783 A88A6184-36E3-4FDD-9BE0-862EC7361ED7 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 ). FIGURE 53. Bolostromus primus n. sp. Male holotype. A. Habitus, dorsal view. B. Habitus ventral view. Scale bar: 0.5mm FIGURE 54. Bolostromus primus 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 55. Bolostromus primus n. sp. Male holotype. A. Palp, prolateral view. B. Palp, retrolateral view. C. Bulb, prolateral view. D. Bulb, apical view. C. Bulb, retrolateral view. Scale bars: 0.1mm. 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.