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Two new species of the armored spider genus Tetrablemma O. P.-Cambridge, 1873 from Colombia and Venezuela are herein described and illustrated: Tetrablemma tatacoa sp. nov. from Huila department, Colombia and T. mochima sp. nov. from Sucre state, Venezuela. These species represent the second record of the genus in the New World. Specimens of these new species were collected in pristine ecosystems, which suggests a natural Gondwanan distribution of the genus. Additionally, a distribution map of the Tetrablemma species in America is herein included.

The goblin spider genus Cinetomorpha Simon is removed from the synonymy of Gamasomorpha Karsch and treated as the senior synonym of Yumates Chamberlin and Lucetia Dumitresco Georgesco. All 41 species occur only in the New World, and the genus is divided into four species groups: the simplex group, the puberula group, the patquiana group and the itabaiana group. The following species are transferred to Cinetomorpha: C. floridana (Banks), comb. nov., and C. sedata (Gertsch Mulaik), comb. nov., from Opopaea; C. angela (Chamberlin), comb. nov., and C. nesophila (Chamberlin), comb. nov., from Yumates; and C. patquiana (Birabén) and C. platensis (Birabén), comb. nov., from Gamasomorpha. Gamasomorpha wasmanniae Mello-Leitão and Lucetia distincta Dumitresco Georgesco are newly synonymized with C. simplex Simon. Two species currently in Gamasomorpha are transferred to Hexapopha Platnick Berniker: H. brasiliana (Bristowe), comb. nov. and H. m-scripta (Birabén), comb. nov. The following 31 species are newly described: C. adaga Ott Bonaldo (Brazil, Colombia, Ecuador and Peru); C. atlantica Ott Brescovit (Brazil); C. baja Ott Ubick (Mexico); C. bandolera Ott Harvey (Mexico USA); C. boraceia Ott Brescovit (Argentina and Brazil); C. campana Ott Harvey (Chile); C. central Ott Brescovit (Brazil); C. chicote Ott Bonaldo (Brazil, Colombia, Ecuador and Peru); C. concepcion Ott Harvey (Chile); C. iguazu Ott Brescovit (Argentina and Brazil); C. itabaiana Ott Brescovit (Brazil); C. laguna Ott Ubick (Mexico); C. lavras Ott Brescovit (Brazil); C. longisetosa Ott Harvey (Costa Rica and Brazil); C. lorenzo Ott Harvey (Guatemala); C. loreto Ott Bonaldo (Peru); C. nayarit Ott Harvey (Mexico); C. orellana Ott Bonaldo (Ecuador); C. pauferro Ott Brescovit (Brazil); C. peluda Ott Harvey (Chile); C. pinheiral Ott Brescovit (Brazil); C. pocone Ott Brescovit (Brazil); C. punctata Ott Brescovit (Brazil); C. quillota Ott Harvey (Chile); C. rinconada Ott Harvey (Chile); C. santamaria Ott Brescovit (Argentina); C. similis Ott Brescovit (Brazil); C. sternalis Ott Bonaldo (Brazil); C. sur Ott Ubick (Mexico); C. waorani Ott Bonaldo (Ecuador); and C. zero Ott Harvey (Mexico to Venezuela).

Kiekie gen. nov. is newly proposed to accommodate 11 Neotropical Ctenidae species. With the exception of one species from Colombia, they are all distributed in Central America. Two species are transferred from Ctenus: Kiekie sinuatipes (F.O. Pickard-Cambridge, 1897) comb. nov. from Costa Rica, and K. curvipes (Keyserling, 1881) comb. nov., with broader distribution from Mexico to Panama. Ctenus incolans (F.O. Pickard-Cambridge, 1900) is synonymized with Kiekie curvipes. Nine species are newly described. Kiekie garifuna sp. nov. was collected in Guatemala and Honduras. Four species were collected in Costa Rica: Kiekie sanjose sp. nov., K. verbena sp. nov., K. sarapiqui sp. nov., and K. griswoldi sp. nov.. Two species were collected in Panama: Kiekie barrocolorado sp. nov. and K. panamensis sp. nov.. Kiekie montanensis sp. nov. was collected in Costa Rica and Panama. Kiekie antioquia sp. nov., from Colombia, was the only species collected in South America. To support the description and further identification of the genus and its species, we provide illustrations of male and female genitalia, habitus and modified metatarsus of the male leg IV, measurements and diagnostic characters. We also provide a distributional map of the specimens herein recorded. Taxonomic changes are based in recent cladistics analysis, showing that at least two species belong to a well-supported clade, sister group of Africactenus Hyatt, 1954. We discuss the phylogenetic relationship of the group and the evolution of key morphological characters.

Two new species of Mesabolivar González-Sponga are described, M. charrua sp. nov. and M. uruguayensis sp. nov. The male of Mesabolivar tandilicus Mello-Leitão is redescribed. Notes on the natural history of the studied species are presented.

This study provides new records, geographical distribution extensions and a checklist of the current ctenids species in Colombia based on the review of four arachnological collections and published literature. A total of 15 new records for Ctenidae in Colombia are reported; nine of these species are new records for the country and the distribution of the remaining six is expanded. The genus Centroctenus Mello-Leitão, 1929 (C. ocelliventer Strand, 1909) is recorded for first time in Colombia and Cupiennius coccineus (F.O. Pickard-Cambridge, 1901) for South America. Due to the strategic geographic position of Colombia, which is a transition zone between Southern and Central American biotas, species inventories in different localities are important to fill distributional gaps. The number of known species of ctenids in Colombia is increased from 16 to 25 and these data will be useful for future studies in taxonomy, systematics and biogeography of this family.