The flattie spiders of the Selenops isopodus species group (Araneae: Selenopidae) with a review of Selenops records from Colombia Author Crews, Sarah C. California Academy of Sciences, Department of Entomology, 55 Music Concourse Drive, San Francisco, CA, 94118, USA. Author Galvis, William Grupo de Investigación de en Aracnología & Miriapodología (GAM-UN), Instituto de Ciencias Naturales, Universidad Nacional de Colombia, sede Bogotá, Colombia. Author Torres, Richard A. 0000-0003-1455-1981 Pós-graduação em Zoologia. Instituto de Ciências Biológicas. Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, CEP 31270 - 901, Brazil. Grupo de Investigación en Zoología y Ecología. Universidad de Sucre. Sucre, Colombia. richardtorree @ gmail. com; https: // orcid. org / 0000 - 0003 - 1455 - 1981 & Grupo de Investigación en Zoología y Ecología, Universidad de Sucre, Sucre, Colombia. richardtorree@gmail.com Author Gutiérrez-Estrada, Miguel A. Grupo de Investigación Ecología y Biodiversidad en Ecosistemas Tropicales (EBET), Facultad Ciencias Básicas y Aplicadas, Universidad de la Guajira, Riohacha, Colombia. Author Sarmiento, Jessica Grupo de Investigación en Recursos Naturales, Universidad de Pamplona, Pamplona, Colombia. Author Esposito, Lauren A. 0000-0002-5514-7486 California Academy of Sciences, Department of Entomology, 55 Music Concourse Drive, San Francisco, CA, 94118, USA. & lesposito @ calacademy. org; https: // orcid. org / 0000 - 0002 - 5514 - 7486 lesposito@calacademy.org text Zootaxa 2021 2021-04-21 4964 1 61 82 journal article 7075 10.11646/zootaxa.4964.1.3 19ec59cf-a6ba-4760-8a7f-dac3e88b0775 1175-5326 4706688 6E9CAF76-1905-4442-B355-5F9206BD9B16 Selenopidae in Colombia In general, many South American selenopids appear to be widespread with no straightforward biogeographic barriers. It is difficult to determine if the small distributions of some species represent narrow areas of endemism, or if like most selenopids, they are poorly collected. In some cases, as with Selenops cocheleti Simon, 1880 and S. mexicanus Keyserling, 1880 , the spiders probably have moved around with people in the past and continue to do so (Crews 2011; Crews et al. 2016 ). In other species, like S. banksi Muma, 1953 , species are poorly collected but have an extremely broad distribution, probably due to their proclivity to live in the canopy (Crews et al. 2021). Some species appear to be restricted to small areas but eventually are found in other areas far away, and it may take a while to fill in the gap ( Crews and Harvey 2011 ). Currently, at least eight selenopid species are known from Colombia ( S. bullerengue sp. nov. , S. curruganja Crews & Galvis 2021 , S. cocheleti , S. geraldinae Corronca, 1996 , S. isopodus , S. lavillai Corronca, 1996 , S. mexicanus , and S. sp. ‘leg tufts’—see below) with two being synanthropic ( S. cocheleti , S. mexicanus ) and two endemic ( S. bullerengue sp. nov. , S. curruganja ). Given the distribution of S. banksi (Crews et al. 2021) , it is likely this species is also found in Colombia . Both sexes are not available for all known species, and there are localities from which only juveniles that cannot be determined to species are known, and at least one of these is a new record for the country or a new species. We are currently rearing juveniles of this species to determine its identity. Nevertheless, there is much more to discover. FIGURES 56–59. Habitats of species of the S. isopodus group. 56 Habitat of S. arikok , Arikok National Park, Aruba (photo Jake Scott); 57 Habitat of S. curazao Curaçao, Netherlands Antilles (photo Carel de Haseth; 58 Habitat of S. isopodus Barichara , Colombia (photo by Sarah Crews); 59 Habitat of S. bullerengue sp. nov. , El Roble, Biological Station Tierra Santa (photo Richard Torres). Colombia exhibits the same patterns on a smaller scale within its borders as broader patterns of diversity on the South American continent: That is, many species are widespread and can be found syntopically with other widespread species and/or selenopid species with more restricted distributions. For example, it appears that S. isopodus is distributed (thus far) exclusively within the Cordillera Oriental and adjacent Caribbean coast, while S. bullerengue sp. nov. is thus far only know from the Caribbean coast. Continued and concentrated collecting efforts will help us to understand distributional patterns of selenopids in the region. Below we have provided records of all species of selenopids collected in Colombia to date as well as a map that also indicates unidentifiable juveniles ( Fig. 60 ). Some records come from the citizen science efforts of iNaturalist, which are useful for adding locality data for a poorly known group, as well as life history data (e.g.—life stages, time of year present, etc.). All images were examined by the first author, and if there were any doubts to the identity of the specimens in the images, they are only included as Selenops sp.