Ariadna lemosi Giroti & Brescovit 2018, new species
Creators: name: Giroti, André Marsola
name: Brescovit, Antonio Domingos
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Segestriidae
Ariadna
Ariadna lemosi

description: 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.
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).
description: Published as part of Giroti, André Marsola & Brescovit, Antonio Domingos, 2018, The taxonomy of the American Ariadna Audouin (Araneae: Synspermiata: Segestriidae), pp. 1-114 in Zootaxa 4400 (1) on pages 104-106, DOI: 10.11646/zootaxa.4400.1.1, http://zenodo.org/record/1207641