Ariadna lemosi, 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 : 104-106

publication ID 10.11646/zootaxa.4400.1.1

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scientific name

Ariadna lemosi

new species

Ariadna lemosi 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 View Materials ) 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 View Materials ) 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 ).


McNeese State University