Revision of Neotropical wolf spider genus Arctosa C. L. Koch, 1847 (Araneae: Lycosidae), with description of seven new species Author Paredes-Munguía, Williams 0000-0002-3320-4611 Pontifícia Universidade Católica do Rio Grande do Sul, Escola de Ciências da Saúde e da Vida, Museu de Ciências e Tecnologia, Laboratório de Aracnologia, Porto Alegre, Brazil. & Museo de Historia Natural de la Universidad Nacional Mayor de San Marcos, Laboratorio de Entomología, Av. Arenales 1256, Lima 14, Peru. & williams. paredes @ acad. pucrs. br; https: // orcid. org / 0000 - 0002 - 3320 - 4611 williams.paredes@acad.pucrs.br Author Brescovit, Antonio D. 0000-0002-1511-5324 Laboratório de Coleções Zoológicas, Av. Vital Brasil, 1500, Butantã, 05503 - 900, São Paulo, SP, Brazil. & antonio. brescovit @ butantan. gov. br; https: // orcid. org / 0000 - 0002 - 1511 - 5324 antonio.brescovit@butantan.gov.br Author Teixeira, Renato A. 0000-0002-1756-9821 Pontifícia Universidade Católica do Rio Grande do Sul, Escola de Ciências da Saúde e da Vida, Museu de Ciências e Tecnologia, Laboratório de Aracnologia, Porto Alegre, Brazil. & Pontifícia Universidade Católica do Rio Grande do Sul, Escola de Ciências da Saúde e da Vida, Museu de Ciências e Tecnologia, Laboratório de Aracnologia, Porto Alegre, Brazil. & renatoaug. tx @ gmail. com; https: // orcid. org / 0000 - 0002 - 1756 - 9821 renatoaug.tx@gmail.com text Zootaxa 2024 2024-02-19 5414 1 1 83 http://dx.doi.org/10.11646/zootaxa.5414.1.1 journal article 10.11646/zootaxa.5414.1.1 1175-5334 10681263 3B1DFADA-C20E-473B-A5E9-843548B54AD3 Arctosa mineira sp. nov. Figs 2e , 22‒23 , 66 Type material. Female holotype from Parque Nacional da Serra do Cipó , 19°37'S 43°21'W , 21–27.vii.2002 , Jaboticatubas , Minas Gerais , Brazil , E.S.S. Álvares leg. ( UFMG 6319 ) . Etymology. The species epithet refers to people native from the Brazilian state of Minas Gerais . Diagnosis. Arctosa mineira sp. nov. can be distinguished from all other members of the genus by the extremely reduced transversal and median septa (MS, Figs 22a , 23b ), and head of spermatheca piriform, with vulval chamber as large as the head of spermatheca (HS, Figs 22d , 23b ). FIGURE 22. Arctosa mineira sp. nov. Epigynum (UFMG 3619) a–d (a, ventral; b, dorsal; c, posterior; d, anterior) Scale bars: a–d 0.25 mm. FD fertilization duct, HS head of spermatheca, MS median septum, SS stalk of spermatheca, VC vulval chamber. Description. Male. Unknown. Female. Holotype (UFMG 6319). Carapace brown covered by white, short, and black bristles except into the irregular yellow longitudinal median band. Sternum yellow longer than wide, covered by short black bristles abundant in the marginal area and sparsely covered in the central area ( Fig. 23c ). Ocular area black and the cephalic portion of the prosoma covered by sparse large black bristles ( Fig. 23a ); four long black bristles on the clypeal condyle anterior to AER. First row of eyes straight, shorter than the second row; AME slightly larger than the ALE; PME separated by a length greater than their radii. Chelicerae brown covered frontally with long brown hairs and the rest of it by long white hairs; chillum conspicuous and membranous, divided with the mesial portion sclerotized; condyle notorious and clearer than the chelicerae; endites light brown and convergent; labium darker than the endites; both endites and labium yellowish in their distal portion. All segments of legs yellow except on tarsi which are darker; annuli on all portions of legs except on tarsi ( Fig. 23a ). Opisthosoma all covered by tiny white bristles, the dorsum is olive and covered by tiny black large bristles; cardiac mark absent; venter yellow sparsely covered by black bristles; spinnerets yellow; anterior spinnerets and posterior spinnerets cylindrical and equal in size. Epigyne ( Figs 22 , 23b, d ), median septum square covered by white bristles, transversal septum thin and less noticeable; the atrium is absent. Copulatory opening is located at the intersection of both septa. In the dorsal view, the fertilization duct is membranous, curved, and thin. ( Figs 22b, c ). The head of spermatheca are notoriously piriform and large; the stalk is narrow than the head of spermatheca and curved directing outwards; vulval chamber ventrally directed visible in apical view ( Fig. 22d ), rounded and as bigger than the head of spermatheca ( Fig 22b ). Leg formula IV>I>II>III. Spination pattern: femur I p 0-0-1 d 1-1-1, II p 0-0-1 d 1-1-1 r 0-0-d1, III p 0-d1-d1 d 1- 1-1 r 0-d1-d1, IV p 0-0-d1ap d 1-1-1 r 0-0-d1ap; patella I p 1 d 1-ap(1 bristle), II p 1 d 1-ap(1 bristle), III p 1 d 1bristle- 1ap r 1, IV p 1 d 1 bristle-1ap r 1; tibia I p 2-1 d 1 bristle-1 bristle v 2-1-2ap r 0-0-1, II p d1-1 d 1bristle v 1-1-2ap, III p 1-v1 d r1-1 r 1-1 v 2-1-2ap, IV p 1-d1 d 1-1 r 1-1 v 2-2-2ap; metatarsus I p 0-2-2 r 0-2-2 d 1bristle-1bristle v 2-0-1ap, II p 0-2-2 d 1bristle-1bristle r 1-2-2 v 2-0-1ap, III p d1-d1-2 d 1bristle-1bristle r d1-1-2 v 2-2-1ap, IV p 0-0-1-1-2ap d 0-r1-1ap r 1-1-1-4ap v 1-p1-r1-0-0-r1-p1-2ap. FIGURE 23. Arctosa mineira sp. nov. Female habitus (UFMG 3619) a, c, e (a, dorsal; c, ventral; e, lateral) Epigynum b, d (b, ventral; d, dorsal) f, eggsac. Scale bars: a, c, e 1mm, b, d 0.1 mm, f 1 mm. HS head of spermatheca. Measurements: TL 6.25, CL 3.25, CCW 2.00, CTW 2.50, CCH 1.20, CTH 1.24. Eyes: AME 0.14, ALE 0.12, PME 0.28, PLE 0.24, interdistances:AME-AME 0.24; AME-ALE 0.04; PME-PME 0.24; PME-PLE 0.30; PLE-PLE 0.56. POQ long 0.56, POQ posterior width 0.80, POQ anterior width 0.50. Chelicerae: 1.50 length. Opisthosoma: length 1.72, width 0.52. Legs: (femur + patella+tibia + metatarsus + tarsus = total length): pedipalp 1.10 + 0.60 + 0.70 - + 0.80 = 3.26, I 2.06 + 1.00 + 1.60 + 1.70 + 1.06 = 8.68, II 1.90 + 0.98 + 1.46 + 1.62 + 1.00= 8.12, III 1.84 + 0.94 + 1.36 + 1.88 + 1.02 = 7.69, IV 2.52 + 1.10 + 2.00 + 2.74 + 1.34 = 10.91. Distribution. Known only for the type locality ( Fig. 66 ). Natural history. The female holotype was collected with a two-valved egg sac, which is covered by a thin layer of silk ( Fig. 23f ).