Review of the American genus Bolostromus Ausserer, 1875 with the description of fourteen new species (Araneae, Cyrtaucheniidae) Dupérré, Nadine Zootaxa 2023 2023-07-17 5317 1 1 88 Dupérré, 2023 Dupérré 2023 [151,397,1014,1041] Arachnida Cyrtaucheniidae Bolostromus Animalia Araneae 66 67 Arthropoda species primus sp. nov.   Figs 53–55, map 2   Type material.  Holotypemale 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 typelocality in Los Ríos Province, Ecuador.  Natural history.Specimens were collected in a primary lowland tropical forest. 4164127338 1979-09-14 T, QCAZ Ecuador -0.9 Rio Palenque 1308 -79.0 Centro Cientifico Rio Palenque 66 67 1 Los Rios holotype 4164127368 1980-02 II Ecuador -0.9 Rio Palenque 1308 -79.0 66 67 1 Los Rios paratype 4164127369 1980-12-29 QCAZ, MAB, UNESCO Ecuador Sandoval 66 67 1 Los Rios paratype 4164127319 1977-02-02 T Ecuador 220 -0.9 Rio Palenque 1308 -79.0 66 67 1 Los Rios paratype 4164127374 [388,690,1260,1287] QCAZ, CC Devries Ecuador 66 67 1 Los Rios paratype 4164127301 1977-02-27 T Ecuador 220 -0.9 Rio Palenque 1308 -79.0 66 67 1 Los Rios paratype 4164127357 [290,483,1296,1322] QCAZ Devries Ecuador 66 67 1 Los Rios paratype