Ariadna lemosi, Giroti & Brescovit, 2018

Ariadna lemosi View in CoL new species

Figures 66 View FIGURE 66 , 72 View FIGURE 72

Type –material. ♂ holotype from Parque Nacional da Serra do Cipó ( 19°22'S; 43°36'26"W), Santana do Riacho, Minas Gerais, Brazil, 21.IV.2010, B.T. Faleiro leg., deposited in UFMG 4031 View Materials GoogleMaps . Paratypes: 1♂ from Parque Copesul de Proteção Ambiental , Triunfo [ 29°56'34"S; 51°43'04"W], Rio Grande do Sul, Brazil, 12.XII.2006, R. Ott & A. Barcelos leg. ( MCN 42759) GoogleMaps ; 1♂ from Fazenda Experimental Gralha Azul ( FEGA) ( 25°40'16''S; 49°16'44''W), Fazenda Rio Grande, Paraná, Brazil, IX.2010 GoogleMaps ‒ X.2011, J. Ricetti leg. (IBSP 166973).

Additional material examined. BRASIL: Minas Gerais State: Santana do Riacho, Parque Nacional da Serra do Cipó ( 19°22'S; 43°36'26"W), 1♂, 18.V.2010, B.T. Faleiro leg. ( UFMG 3410 View Materials ) GoogleMaps ; São Paulo: Jundiaí, Parque Estadual da Serra do Japi ( 23°17'S; 46°59'W), 2♂, I.2008, J. Sobjack leg. ( UFMG 7370 View Materials ) GoogleMaps ; Paraná State: Guarapuava [ 25°23'42"S; 51°27'28"W], 1♂, 12.I.1987, Equipe PROFAUPAR leg. ( MCN 20711) GoogleMaps .

Diagnosis. Ariadna lemosi n. sp. is similar to A. caparao 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 straight metatarsi I ( Fig. 66E View FIGURE 66 ), chelicerae without lameliform distal dorsoprolateral projections, and abdomen light grey dorsally with a diffuse dark dorsal pattern of transversal bands ( Fig. 66A‒B View FIGURE 66 ).

Etymology. The specific name is a patronym in honor of the spider systematist and friend Rafael Yuji Lemos, who has helped André M. Giroti since its first works on taxonomy and systematics.

Description. Male ( Holotype). Carapace and chelicerae reddish brown ( Fig. 66A View FIGURE 66 ). Endites orange; labium dark orange. Sternum orange, with darker margins, and three pairs of fainted dark marginal areas ( Fig. 66B View FIGURE 66 ). Palps yellow ( Fig. 66F‒G View FIGURE 66 ). Legs orange, with pairs I‒II darker and with dark pigment forming diffuse rings in the distal region of metatarsi and tarsi ( Fig. 66C‒E View FIGURE 66 ). Abdomen grey, lighter dorsally, with a diffuse dark dorsal pattern ( Fig. 66A‒B View FIGURE 66 ). Total length 6.72; carapace 3,28 long, 2.36 wide. Palps: tibia incrassated, with the dorso-ventral diameter equal to the bulb; bulb sub-rectangular, mid-portion and embolus with almost the same lenght; embolus tapered, with a sinuous tubular tip ( Fig. 66F‒G View FIGURE 66 ). Legs: slender and coated with setae ( Fig. 66C‒E View FIGURE 66 ); tarsi II slightly inflated ventrally, compared to the others; tarsal brush of putative chemosensory setae present in legs I‒IV, but reduced in leg I. Leg formula: I-II-IV-III. Leg measurements: I, femur 3.12, patella 1.08, tibia 2.48, metatarsus 2.44, tarsus 0.68, total 9.8; II, 2.92, 1.08, 2.56, 2.4, 0.68, 9.64; III, 2.0, 0.92, 1.48, 1.6, 0.68, 6.68; IV, 2.48, 1.12, 1.92, 1.68, 0.64, 7.84. Macrosetae: I, femur D0-0-0-0-1/0-1-0; tibia P0-1-0-1-0-1-0, vp0-0-0-0-0-1-0, vr1-0-0-1-0-1-0, R0-1- 0-1-0-1-0; metatarsus vp1-0-0-1-0-0-1, vr1-0-0-1-0-0-1, r0-1-0-0-0-0-0; II, femur D0-0-0-0-0-1-0; tibia P0-1-0-1- 0-1/0-0, vp0-0-0-1-0-1-0, vr1/2-0-1-0-1-0-1, R0-1-0-1-0-1-0; metatarsus vp1-0-0-1-0-0-1, vr1-0-0-1-0-0-1, r0-1-0- 0-0-0-0; IV, femur D1-1-0-0-0-0-0; metatarsus vr metatarsal comb with 4-5 macrosetae. Female. Unknown.

Variation. Male (n=7): Total length 4.72‒6.72; carapace 2.4‒3.28 long, 1.64‒2.36 wide; femur I 2.28‒3.12. Distribution. Southeast and south of Brazil ( Fig. 72 View FIGURE 72 ).