The taxonomy of the American Ariadna Audouin (Araneae: Synspermiata: Segestriidae) Author Giroti, André Marsola Author Brescovit, Antonio Domingos text Zootaxa 2018 2018-03-26 4400 1 1 114 journal article 30419 10.11646/zootaxa.4400.1.1 2b7bf048-65d5-4814-bbdb-59d53d15b00e 1175-5326 1207641 59CC08B8-5B13-42EC-943E-C930D7D0DD7F Ariadna lemosi new species Figures 66 , 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 . 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) ; 1♂ from Fazenda Experimental Gralha Azul ( FEGA ) ( 25°40'16''S ; 49°16'44''W ), Fazenda Rio Grande , Paraná , Brazil , IX.2010 ‒ 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 ) ; São Paulo : Jundiaí , Parque Estadual da Serra do Japi ( 23°17'S ; 46°59'W ), 2♂ , I.2008 , J. Sobjack leg. ( UFMG 7370 ) ; Paraná State: Guarapuava [ 25°23'42"S ; 51°27'28"W ], 1♂ , 12.I.1987 , Equipe PROFAUPAR leg. ( MCN 20711) . Diagnosis. Ariadna lemosi n. sp. is similar to A. caparao n. sp. due to the morphology of the male palp ( Figs 65A‒B , 66F‒G ), but differs by the straight metatarsi I ( Fig. 66E ), chelicerae without lameliform distal dorsoprolateral projections, and abdomen light grey dorsally with a diffuse dark dorsal pattern of transversal bands ( Fig. 66A‒B ). 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. FIGURE 66. Ariadna lemosi n. sp. . Male (Paratype) from Guarapuava (MCN 20711) (A‒G): habitus, dorsal (A) and ventral view (B); left leg I, prolateral (C) and retrolateral view (D); left metatarsus I, ventral view (E); left palp, prolateral (F) and retrolateral view (G). Scale bar: 1mm. Description. Male ( Holotype ). Carapace and chelicerae reddish brown ( Fig. 66A ). Endites orange; labium dark orange. Sternum orange, with darker margins, and three pairs of fainted dark marginal areas ( Fig. 66B ). Palps yellow ( Fig. 66F‒G ). 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 ). Abdomen grey, lighter dorsally, with a diffuse dark dorsal pattern ( Fig. 66A‒B ). 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 ). Legs: slender and coated with setae ( Fig. 66C‒E ); 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 ).