Ariadna ubajara, Giroti & Brescovit, 2018

Giroti, André Marsola & Brescovit, Antonio Domingos, 2018, The taxonomy of the American Ariadna Audouin (Araneae: Synspermiata: Segestriidae), Zootaxa 4400 (1), pp. 1-114 : 93-95

Ariadna ubajara new species

Figures 59 , 71

Type-material. ♂ holotype from Parque Nacional de Ubajara , Ubajara [03°51'S; 40°55'W], Ceará, Brazil, IX‒XI.2007, D. Loebmann leg., deposited in IBSP 89344 . Paratype, ♂ with same data as the holotype ( IBSP 166972 ).

Diagnosis. Males of Ariadna ubajara n. sp. are similar to A. caerulea due to the morphology of palps ( Figs 25A‒B , 59F‒G ), but differ by the presence of males with a sinuous metatarsi I ( Fig. 59C‒E ).

Etymology. The specific name is a noun in apposition taken from the type locality, Parque Nacional de Ubajara, Ubajara, Ceará, Brazil.

Description. Male (Holotype). Carapace and chelicerae dark reddish brown ( Fig. 59A ). Endites orange; labium dark orange. Sternum orange with darker margins, and three pairs of dark marginal areas, the hind one fainted ( Fig. 59B ). Palps orange ( Fig. 59F‒G ). Legs brownish orange, pairs I‒II darker, with the metatarsus marbled with dark pigment, and dark diffuse rings in the distal region ( Fig. 59C‒E ). Abdomen grey, lighter ventrally, and with transversal thin clear lines dorsally ( Fig. 59A‒B ). Total length 9.04; carapace 4.4 long, 3.12 wide. Palps: tibia incrassated, with the dorso-ventral diameter longer than the bulb; bulb sub-rectangular, midportion shorter than the embolus; embolus thickened and with a tubular tip ( Fig. 59F‒G ). Legs: robust and coated with setae ( Fig. 59C‒E ); tarsal brush of putative chemosensory setae present in tarsi I‒IV, extending to the median region of the metatarsi IV, but reduced in leg I. Leg formula: I-II-IV-III. Leg measurements: I, femur 4.32, patella

1.64, tibia 3.84, metatarsus 4.12, tarsus 1.0, total 14.92; II, 4.12, 1.64, 3.88, 4.0, 0.92, 14.56; III, 3.16, 1.32, 2.36, 2.56, 0.84, 10.24; IV, 3.84, 1.6, 3.08, 2.88, 0.84, 12.24. Macrosetae: I, femur D0-0/1-1-0-1-2/1-1/2-2/1-0/1-2-0, P0- 0-0-0-0-0-0-2-0-1-0; tibia D0-0-0-0-1-1-0, P1-1-0-1-0-1-0, vp1-0-1-0-1-0-1, vr2-1-1/0-1-0-1, R1-1-0-1-1/0-1-0-1- 0; metatarsus vp0-1-0-0-0-0-1, vr0-1/0-0-0-0-0-1; II, femur D0-1-1-1-1/2-1-1/2-1-1/0-1-0, P0-0-0-0-0-0-0-1-0-1; tibia D0-0-0-0-0-1-0, P0-1-0-1-0-1-0, vp0-0-0-1/0-0-1-0-1, vr2-0-1-0-1-0-1, R1-1-0-1-1-1-0; metatarsus p0-1-0-0- 0-0-0-0, vp0-1-0-0-0-0-0-1, vr0-1-0-0-1-0-0-1, r0-1-0-0-1-0-0-0; IV, femur D1/2-2/1-1-1-1/2-1-1/0-0/1-0-0/1-0, R0-0-0-0-0-0-0-0/1-1-0-0; metatarsus vp0-0-0-0-0-0-2, vr metatarsal comb with 4 macrosetae. Female. Unknown

Variation. Male (n=2): Total length 9,04‒9,36; carapace 4.4‒4.72 long, 3.12‒3.36 wide; femur I 4.32‒4.6. Distribution. Only known from the type locality ( Fig. 71 ).

Figures

FIGURE 25. Ariadna caerulea Keyserling, 1877. Male from Suesca (ICN-Ar 4762) (A‒B): left palp, prolateral (A) and retrolateral view (B). Female from Bogotá (MNHNP-AR 25233) (C‒D): Internal genitalia, lateral view (C); Anterior receptaculum, ventral view (D). Scale bar:1mm.

FIGURE 71. Locality of the specimens of A. obscura, A. boliviana, A. aurea n. sp., A. ipojuca n. sp. and A. ubajara n. sp. examined in the present study.

FIGURE59. Ariadna ubajara n. sp.. Male (Paratype)from Parque Nacionalde Ubajara (IBSP 166972) (A‒G):habitus, dorsal (A) and ventral view (B); right leg I, prolateral (C) and retrolateral view (D); right metatarsus I, ventral view (E); left palp, prolateral (F) and retrolateral view (G). Scale bar: 1mm.