Bolostromus nischki, Dupérré, 2023

Dupérré, Nadine, 2023, Review of the American genus Bolostromus Ausserer, 1875 with the description of fourteen new species (Araneae, Cyrtaucheniidae), Zootaxa 5317 (1), pp. 1-88 : 56-60

Bolostromus nischki new species

Fig. 44–46 , map 2

Type material. Male holotype from Ecuador Cotopaxi Province, OTONGA Biological Reserve (-00.41433 - 79.00035) 1888m, 16 Aug.–5 Sept. 2014, pitfall trap, E.E. Tapia, C. Tapia & N. Dupérré ( QCAZ) . Paratypes: Same data as holotype, 1J, 24 May–8 June 2014 ( ZMH-A0016063 ) ; 1J, 5–19 Sept. 2014 ( MCZ) ; OTONGA Biological Reserve, Rio Esmeraldas (-00.41941 -78.6607) 1717m, 24 May–8 June 2014, 4J, pitfall trap, E.E. Tapia, C. Tapia & N. Dupérré ( QCAZ) ; OTONGA Biological Reserve , (-00.41994 -79.00623) 1997m, 21 June–02 July 2014, 2J, pitfall trap, E.E. Tapia, C. Tapia & N. Dupérré ( ZIMG) ; OTONGA Biological Reserve (-00.41564 -79.00452) 2105m, 24 May–8 June 2014, 1J, pitfall trap, E. Tapia, C. Tapia & N. Dupérré ( ZMH-A0016064 ) ; OTONGA Biological Reserve (-00.42261 -79.51070) 2225m, 8–21 June 2014, pitfall trap, 3 J, E. Tapia, C. Tapia & N. Dupérré ( ZMH-A0019762 ) ; 24 May–08 June 2014, pitfall trap, 3 J, E. Tapia, C. Tapia & N. Dupérré ( QCAZ) ; 16 Aug.–5 Sept. 2014, pitfall trap, 1 J, E. Tapia, C. Tapia & N. Dupérré ( MCZ) ; 19 Sept.–2 Oct. 2014, pitfall trap, 3 J, E. Tapia, C. Tapia & N. Dupérré ( AMNH) ; 3 Aug.–16 aug. 2015, pitfall trap, 1 J, E. Tapia, C. Tapia & N. Dupérré ( QCAZ) .

Additional material. ECUADOR: Los Rio Province : C.C. Rio Palenque, 00’ 54’’ S, 79’ 00’’W, 0M, 30. Aug. 1977, 3J, S. Sandoval ( QCAZ); C.C. Rio Palenque, coleccion MAB, UNESCO , 9J, S. Sandoval ( QCAZ); C.C. Rio Palenque, 00’ 54’’ S, 79’ 00’’W, 0M, 30. Aug. 1977, 220m, 1J, S. Sandoval ( QCAZ); C.C. Rio Palenque, 00’ 54’’ S, 79’ 00’’W, 2. Feb. 1977, 220m, bosque primario, 3J, T . DeVries ( QCAZ); C.C. Rio Palenque, 00’ 54’’ S, 79’ 00’’W, 4. Mar. 1979, 220m, bosque secundario, 1J, T . DeVries ( QCAZ); C.C. Rio Palenque, 00’ 54’’ S, 79’ 00’’W, 23. Nov. 1980, 220m, palma abierta, 2J, T . DeVries ( QCAZ); C.C. Rio Palenque, 13.Sept.1979, ex. palma, 1J, T . S. Sandoval ( QCAZ); Los Ríos, CCRP : 19.ix.79, 3J, S. Sandoval ( QCAZ); Los Ríos, CCRP : 15.ix.79, 3J, T. DeVries ( QCAZ); Los Ríos, CCRP : 12.ix.79, 1J, S. Sandoval ( QCAZ) .

Etymology. The specific name is in honor of Frank Nischk, German entomologist lover of the OTONGA cloud forest, in recognition of his wonderful nature documentaries.

Diagnosis. Males most resemble B. fonsecai n. sp. but are distinguished from all species by the combination of the following characters: heavily granulated carapace, with a deep pit in cephalic grove ( Fig. 45C , arrow), and a short embolus ( Fig. 46C ), from B. fonsecai n. sp. by their short embolus and presence of two spines on metatarsi I ( Fig. 45D ), while the latter has longer embolus ( Fig. 64C ) and no spines on metatarsi I ( Fig. 63D )

Description. Male (holotype): Total length: 5.33; carapace length: 2.79; carapace width: 1.97; carapace height: 1.55; abdomen length: 2.54. CEPHALOTHORAX: Carapace elongated hexagonal margin sinuous; pars cephalica dark brown, rugose; pars thoracica lighter brown, rugose; cephalic groove well defined, with pit medially; fovea broad, procurved ( Fig. 45A ); caput highly elevated ( Fig. 45C ). Clypeus height: 0.25. Chelicerae dark reddish-brown; promargin seven teeth and 16 denticles; rastrellum with 10 spines. Sternum 1.60 /1.35, dark reddish-brown, reticulate; all sigillae small, brown ( Fig. 45B ). Labium reddish-brown without cuspule. Endites reddish-brown with nine inner hidden cuspules; serrula present (observed on paratype). EYES: AME: 0.19; ALE: 0.26; PLE: 0.16; PME: 0.08; interdistances: AME: 0.06; AME-ALE: 0.04; PME: 0.43; PME-PLE: 0.05; LE: 0.05; ocular quadrangle: 0.75/0.77/0.30. ABDOMEN: oval; dorsally light gray, ventrally beige ( Fig. 44A, B ). Spinnerets: median spinnerets: 0.26; lateral spinnerets: 0.41/0.26/0.26. LEGS: Leg I: femur, patellae and tibiae dark orange-brown, metatarsi and tarsi orange; leg II femur orange-brown, patellae to tarsi orange; leg III–IV without pattern, uniformly orange. Metatarsi I–II with apical short scopulae; tarsi I–II with scopulae ( Fig. 45D ); leg III–IV without scopulae. Coxae I–II without inner short stiff setae.Tarsal claw teeth (5/6-7) (5/6) (3-4/4-5) (5/4-5). LEGS MEASUREMENTS: I 7.07 (2.11/0.76 /1.72/1.46/1.02); II 7.04 (2.09/0.66/1.71/1.56/1.02); III 5.32 (1.56/0.56/0.95/1.32/0.93); IV 8.06 (2.45/0.77/2.06/1.6 4/1.14); leg formula: 4123. LEGS SPINATION: femur I(0); II 1d; III 1d, IV 1d, with 10 grouped pro-apical spines; patella I, II, IV (0); III with 10p, 1r; tibia I 1-1-1v; II 1-1-1v, 1vap; III 1p, 1v, 3vap, 1d, 1r; IV 1-1v, 2vap; metatarsus I 1v, 1vap; II 1-1v, 2vap; III 1-1, 1-1-1-2d, 1r, 1-1v, 2vap; IV 1p, 1-2v, 3vap; tarsus I, II (0); III 3r, 2p; IV 5r, 6p. GENITALIA: Palp measurements: 1.49/0.51/1.13/0.55; bulb: 0.53/0.23. Palpal tibia wide basally; palpal cymbium with five apical spines ( Fig. 46A, B ); bulb globose; embolus short, slightly sinuous apically ( Fig. 46C–E ).

Female: Unknown.

Distribution. Ecuador, Cotopaxi and Los Ríos Provinces.

Natural history. Males were collected at 200m in Los Ríos Province and from 1717m up to 2225m in Cotopaxi Province. The species inhabit the Chocó region of Ecuador and was found in evergreen foothill forest up to the cloud forest.

Figures

MAP 2. Distribution map of Bolostromus in Ecuador. Bolostromus devriesi n. sp. (green triangle), B. riveti Simon, 1903 (turquoise star), B. hubeni n. sp. (yellow circle), B. urku n. sp. (green half circle), B. epiphyticus n. sp. (red square), B. pristirana n. sp. (pink losange), B. nischki n. sp. (blue inverted triangle), B. fonsecai n. sp. (black cross), B. primus n. sp. (black rectangle), B. losrios n. sp. (red pentagone), B. stridulator n. sp. (blakc circle), B. valdivia n. sp. (yellow square), B. italoi n. sp. (orange circle), B. gaujoni (Simon, 1889) (yellow star).

FIGURE 44. Bolostromus nischki n. sp. Male holotype. A. Habitus, dorsal view. B. Habitus ventral view. Scale bars: 1.0mm.

FIGURE 45. Bolostromus nischki n. sp. Male holotype. A. Carapace, dorsal view. B. Carapace, ventral view. C. Carapace, lateral view (arrow point to cephalic pit). D. Leg I, prolateral view. Scale bars: 1.0mm.

FIGURE 46. Bolostromus nischki n. sp. Male holotype. A. Palp, prolateral view. b Palp, retrolateral view. C. Bulb, prolateral view. D. Bulb, ventral view. E. Bulb, retrolateral view. Scale bars: A, B: 0.5mm; C–E: 0.1mm.

FIGURE 63. Bolostromus fonsecai n. sp. Male holotype. A. Carapace, dorsal view. B. Carapace, ventral view. C. Carapace, lateral view. D. Right leg I, retrolateral view. Scale bars: 1.0mm.

FIGURE 64. Bolostromus fonsecai n. sp. Male holotype. A. Palp, prolateral view. B. Palp, retrolaterla view. C. Bulb, prolateral view. D. Bulb, ventral view. E. Bulb, retrolateral view. Scale bars: A, B: 0.5mm; C–E: 0.1mm.