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 serii Roth & Brown, 1976 Fig. 65 Arctosa serii Roth & Brown, 1976: 61 , figs 1‒2, 4‒5, 7. Male holotype from El Desemboque de los Seris, Sonora , Mexico , 29°30'N 112°34'W , 4.iii.1974 , H. Flanders leg. , AMNH, not examined). Dondale & Redner 1983a: 26 , figs 57‒59, 61. Arctosa littoralis : Chamberlin 1924: 673 (some specimens from Gulf of California misidentified, according to Roth & Brown 1976 ). Remarks. Arctosa serii is sympatric with A. littoralis , but the latter prefers mostly sandy beach environments ( Esquivel-Bobadilla et al . 2013 ). Chamberlin (1924) confused some specimens of A. serii with A. littoralis because both came from similar localities. However, the larger size of A. serii (about one third larger than A. littoralis ) and the paler body pattern also served to differentiate it. Emended diagnosis. Because of its sympatry with A. littorais , males of A. serii are recognized among all neotropical species by the shorter and sharp posterior arm of median apophysis, which is also not spatulated as in A. littoralis ( Roth & Brown 1976 : fig. 2). Females of A. serii are distinguished from all neotropical species by the shortest median septum in the epigyne and the narrow transversal septum ( Roth & Brown 1976 : figs 4, 5). Description. See Roth & Brown (1976: 61‒63) . Distribution. Mexico ( Baja California , Sonora ), updated records based on Roth & Brown (1976: 63) ( Fig. 65 ).