Bolostromus devriesi, 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 : 81

Bolostromus devriesi new species

Figs 65 , 66 map. 2

Type material. Holotype female from Ecuador, Esmeraldas Province, San Miguel de Cayapas, 25.vi.77, DeVries ( QCAZ).

Etymology. The specific name is in honor of biologist Tjitte de Vries in recognition of his work in ecology, ornithology and collector of the type specimen.

Diagnosis. Females most resemble B. busu n. sp. but are distinguished from all species by the combination of the following characters: cephalothorax smooth, with deep pit in cephalic groove ( Fig. 66A, C ) absent in the latter ( Fig. 12C ), and internal genitalia with short spermathecae with sub apical constriction ( Fig. 66E ), whereas spermathecae elongated with internal elongated lobes in B. busu n. sp. ( Fig. 12E ).

Description. Female (holotype): Total length: 7.94; carapace length: 3.65; carapace width: 2.68; carapcae height: 1.71; abdomen length: 4.29. CEPHALOTHORAX: Carapace almost rectangular but wider anteriorly, margin sinuous; pars cephalica dark reddish; pars thoracica lighter reddish smooth; cephalic groove well defined, deep pit medially; fovea broad, procurved ( Fig. 66A ); caput strongly elevated ( Fig. 66C ). Clypeus height: 0.23. Sternum 2.00/1.44, light orange, darker orange marginally, reticulated; sigillae not observed ( Fig. 66B ). Labium dark reddish-brown without cuspule; elongated. Endites quadrangle; dark reddish-brown with nine cuspules; serrula not observed. Chelicerae dark reddish-brown; promargin six teeth, denticles not observed; rastrellum with 11 spines. EYES: AME: 0.11; ALE: 0.26; PLE: 0.14; PME: 0.06; interdistances: AME: 0.09; AME-ALE: 0.09; PME: 0.54; PME-PLE: 0.04; LE: 0.06; ocular quadrangle: 0.93/1.01/0.36. ABDOMEN: Oval, uniformly dark gray dorsally and ventrally ( Fig. 65A, B ). Spinnerets: median: 040, lateral spinnerets: 0.50/0.38/0.53. LEGS: Uniformly light orange, except palpal tarsi, tarsi I–II dark orange-brown. Coxae I–II with inner short stiff setae. Metatarsi I with thick, half scopulae ( Fig. 66D ); metatarsi II without scopulae; tarsi I with thick complete scopulae ( Fig. 66D ); tarsi II with half scopulae; III–IV without scopulae; palpal tarsi with thick apical scopulae. Tarsal claw teeth (22/14) (22/12) (3/3) (2/3). LEGS MEASUREMENTS: I 7.32 (2.31/1.07/1.70/1.28/0.96); II 6.58 (2.14/1.11/1.48/1.09/0.76); III 4.58 (1.60/0.86/0.53/0.78/0.81); IV 7.73 (2.20/1.00/2.27/1.47/0.79); leg formula: 4123. LEGS SPINATION: femur I–III (0); IV with 12 grouped pro-apical spines; patellae I, II, IV (0); III with 9 pd, 1r; tibia I, II, IV (0); III 3p, 1d, 1r; metatarsus I 1-1v 2vap; II 1-1v, 3vap; III 2p, 1-1-2-1-2d, 2-2-1v, 2-2v, 3vap; IV 2-2v, 3vap; tarsus I, II (0); III 2-3-3-2v; IV 2-3-3-2v.

GENITALIA: Female spermathecae elongated, constricted sub apically with external, small lobes ( Fig. 66E ).

Male: Unknown.

Natural History. The female specimen was collected at an estimated 48m.

Distribution. Only known from the type locality in Esmeraldas province, Ecuador

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 12. Bolostromus busu n. sp. Female holotype. A. Carapace, dorsal view. B. Sternum, ventral view. C. Carapace, lateral view. D. Leg I, prolateral view. E. Internal genitalia, dorsal view. Scale bars: 1.0mm.

FIGURE 65. Bolostromus devriesi n. sp. Female holotype. A. Habitus, dorsal view. B. Habitus ventral view. Scale bars: 0.5mm.

FIGURE 66. Bolostromus devriesi n. sp. Female holotype. A. Carapace, dorsal view. B. Sternum, ventral view. C. Carapace, lateral view. D. Leg I, prolateral view. E. Internal genitalia, dorsal view. Scale bars: 0.5mm.