Ariadna caparao, 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 : 101-104

publication ID 10.11646/zootaxa.4400.1.1

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scientific name

Ariadna caparao

new species

Ariadna caparao   new species

Figures 64‒65 View FIGURE64 View FIGURE 65 , 72 View FIGURE 72

Type-material. ♂ holotype and ♀ paratype from Trilha do Terreirão , Parque Nacional da Serra do Caparaó (20°25'S; 41°52'W), Alto Caparaó, Minas Gerais, Brazil, III.2003, E.W. Wienskoski leg., deposited in IBSP 38345 GoogleMaps   . Paratypes: 1♂ 1♀, same holotype's data (IBSP 166970); 1♂ 1♀ from Parque Nacional da Serra do Caparaó , Espírito Santo / Minas Gerais, Brazil [20°25'S; 41°52'W], 13.X.1986, R.L.C. Baptista leg. ( MNRJ 06420 View Materials ). GoogleMaps  

Additional material examined. BRAZIL: Minas Gerais State: Alto Caparaó, Parque Nacional da Serra do Caparaó [20°25'S; 41°52'W], 1♀, III.2003, E. Wienskoski leg. ( IBSP 166971 View Materials ) GoogleMaps   ; 1♂, 13.X.1986, R.L.C. Baptista leg. (MNRJ 6411); Espírito Santo State: Ibitirama, Distrito de Santa Maria, Parque Nacional da Serra do Caparaó (20°25'44''S; 41°48'6.7''W), 1♂ 6♀ 1imm., 29.XI.2014, L.S. Carvalho & H.C. Costa leg. (CHNUFPI 1267). GoogleMaps  

Diagnosis. Ariadna caparao   n. sp. is similar to A. lemosi   n. sp. due to the morphology of the male palp ( Figs 65A‒B View FIGURE 65 , 66F‒G View FIGURE 66 ), but differs by the sinuous metatarsi I ( Fig. 64D‒F View FIGURE64 ), chelicerae with lamelliform distal dorsoprolateral projections ( Fig. 64C View FIGURE64 ), and abdomen mostly dark dorsally ( Fig. 64A View FIGURE64 ); females resembles A. obscura   due to the tibiae I‒II macrosetae pattern, but differs by the anterior receptaculum without an expanded base and with the dorsal lobe long and almost straight ( Fig. 65C‒D View FIGURE 65 ).

Etymology. The specific name is a noun in apposition taken from the type locality, Parque Nacional da Serra do Caparaó, Alto Caparaó, Minas Gerais, Brazil.

Description. Male (Holotype). Carapace and chelicerae dark brownish orange ( Fig. 64A View FIGURE64 ). Endites orange; labium dark orange. Sternum orange, with darker margins, and marbled with dark pigment ( Fig. 64B View FIGURE64 ). Palps orange ( Fig. 65A‒B View FIGURE 65 ). Legs yellowish brown, with pairs I‒II darker and with dark pigment forming diffuse rings in the distal region of femur, patella, tibia, metatarsus and tarsus ( Fig. 64D‒F View FIGURE64 ). Abdomen uniformly grey ( Fig. 64A‒B View FIGURE64 ). Total length 5.6; carapace 3.04 long, 2.2 wide. Chelicerae with lameliform distal dorso-prolateral projections ( Fig. 64C View FIGURE64 ). Palps: tibia slightly incrassated, with the dorso-ventral diameter shorter than the bulb; bulb sub-rectangular, mid-portion shorter than the embolus; embolus tubular and tapered ( Fig. 65A‒B View FIGURE 65 ). Legs: robust and coated with setae ( Fig. 64D‒F View FIGURE64 ); tarsal brush of putative chemosensory setae present in legs I‒IV, but reduced in pair I. Leg formula: I-II-IV-III. Leg measurements: I, femur 2.96, patella 1.0, tibia 2.12, metatarsus 2.36, tarsus 0.76, total 9.2; II, 2.68, 1.0, 2.12, 2.08, 0.8, 8.68; III, 1.96, 0.76, 1.24, 1.32, 0.68, 5.96; IV, 2.28, 1.0, 1.6, 1.44, 0.68, 7.0. Macrosetae: I, femur D0-0-0-0-0-2-0, P0-0-0-0-1-1-0; tibia P0-1-0-1-0-1-0, vp1-0-0-0-0-0-1, vr1-1-1-1-1-1-1, R0- 1-0-1-0-1-0; metatarsus vp1-0-0-0-0-0-0; II, femur D0-0-0-1-0-2-0, P0-0-0-0-1-1-0; tibia P0-1-0-1-0-1-0, vp0-0-0- 0-0-0-1, vr2/1-1-1-1-1/0-1-1/0-1, R1-0-1-0-1-0-1; metatarsus vp1-0-0-0-0-0-0, vr1-0-0-1-0-0-1; IV, femur D1-1-1- 1-0-1-0, R0-0-0-0-0-1-0; metatarsus vp0-0-0-0-0-0-2/1, vr metatarsal comb with 5 macrosetae.

Female (Paratype—IBSP 38345). Coloration as in male; palps reddish orange, gradually darkening to distal direction ( Fig. 64 View FIGURE64 G-J). Total length 8.44; carapace 4.12 long, 2.8 wide. Chelicerae without lamelliform distal dorso-prolateral projections Carapace with cephalic region elevated ( Fig. 64G View FIGURE64 ). Legs: robust and densely coated with setae, with the setae dorsally concentrated in the articles; legs I‒II with ventro-prolateral and ventroretrolateral tibial macrosetae of similar size, and metatarsal macrosetae of different sizes ( Fig. 64I ‒J View FIGURE64 ). Leg formula: I-II-IV-III. Leg measurements: I, femur 2.92, patella 1.24, tibia 2.08, metatarsus 1.96, tarsus 0.68, total 8.88; II, 2.68, 1.24, 2.16, 1.88, 0.68, 8.64; III, 2.08, 1.08, 1.4, 1.28, 0.6, 6.44; IV, 2.4, 1.36, 1.8, 1.44, 0.64, 7.64. Macrosetae: I, femur D0-0-0-0-0-2-0, P0-0-0-0-2-0-0; tibia vp1-1/0-1-1-1-1/0-1, vr1-1-1-1-1-1/0-1, R0-1-0-1-0-1-0; metatarsus vp1-1-0/1-1-1-1-1-1-1, vr1-1-1-1-0/1-1-0/1-1-1 ( Fig. 64I ‒J View FIGURE64 ); II, P0-0-0-0-1-1-0; tibia vp1-0-1-1-1-1-0, vr1-1-1-1- 1-0/1-1-0, R0-0-0-1-1-1-0; metatarsus vp1-1-1-1-1-1/0-1-1-1, vr1-1-1-0-1-1-1-1-1; IV, metatarsus vr metatarsal comb with 6 macrosetae. Internal genitalia: anterior receptaculum billobulated, with elongated lobes, being the ventral one longer than the dorsal. Ventral lobe sinuous, with the tip expanded and glandular ducts plate located in the median region, extending to the proximal region of the dorsal lobe ( Fig. 65C‒D View FIGURE 65 ).

Variation. Male (n=5): Total length 5.6‒7.52; carapace 3.04‒4.0 long, 2.2‒2.72 wide; femur I 2.96‒3.6. Female (n=10): Total length 7.84‒10.2; carapace 3.88‒4.52 long, 2.68‒3.12 wide; femur I 2.64‒3.04.

Distribution. Brazil (east of Minas Gerais and west of Espírito Santo) ( Fig. 72 View FIGURE 72 ).