Petrichus athleticus Mello-Leitão, 1944 was described from Punta Piedras, Argentina, based on male and female specimens. The species was originally wrongly assigned to Petrichus Simon, 1886 because it has the cephalic region more elevated than the carapace region. However, examination of the holotype has revealed the presence of lateral eye tubercles, and legs I and II longer and stouter than legs III and IV. These characteristics are considered synapomorphic for the Thomisidae. Furthermore, the presence of an epigynal hood (type "hood pocket"), RTA long with simple base and modified apex, absence of tutaculum, and short setae on the surface of the carapace and abdomen corroborate that P. athleticus belongs to Misumenoides F.O.P.-Cambridge, 1900. In this paper, we assign P. athleticus to Misumenoides, redescribe the species, illustrate it for the first time, and extend its known distribution.

O gênero Berlandiella Mello-Leitão, 1929 é revisado e as três espécies conhecidas, Berlandiella insignis Mello-Leitão, 1929 (Rio de Janeiro), B. magna Mello-Leitão, 1929 (Pernambuco, Minas Gerais, Rio Grande do Sul) e B. polyacantha Mello-Leitão, 1929 (Rio de Janeiro, São Paulo) são redescritas e ilustradas. Lectótipos para Berlandiella insignis, B. magna e B. polyacantha foram designados. Descrições e ilustrações de três espécies novas são apresentadas: B. robertae sp. nov. (Brazil e Argentina), B. meridionalis sp. nov. (Brazil) e B. querencia sp. nov. (Brazil). É apresentado um mapa com a distribuição geográfica do gênero.

The spider genus Berlandiella Mello-Leitão, 1929 is revised and the three known species, Berlandiella insignis Mello-Leitão, 1929 (Rio de Janeiro), B. magna Mello-Leitão, 1929 (Pernambuco, Minas Gerais, Rio Grande do Sul), and B. polyacantha Mello-Leitão, 1929 (Rio de Janeiro, São Paulo), are redescribed and illustrated. Lectotypes for Berlandiella insignis, B. magna and B. polyacantha are designated. Descriptions and illustrations of three new species are presented: B. robertae sp. nov. (Brazil and Argentina), B. meridionalis sp. nov. (Brazil) and B. querencia sp. nov. (Brazil). The geographical distribution of the representatives of the genus is presented.

Testudinaria Taczanowski, 1879 includes nine valid species; only four of these species have both sexes described. In this paper we describe the female of T. gravatai Levi, 2005, which can be recognized specially by the abdominal pattern of spots. Testudinaria gravatai Levi, 2005 is similar to T. quadripunctata Taczanowski, 1879, but can be distinguished from that species by the presence of a single median excavation on the upper margin of the epigynal atrium; by copulatory duct almost straight in the basal portion and narrower in the distal portion. We have based our description on a single available female, collected in Criciúma, Santa Catarina, Brazil, a new locality record for the species.

The first record of a nuptial gift in Trechalea amazonica F.O.P.-Cambridge, 1903, is herein presented. The observations were made in the Oriximiná, Pará, northern Brazil. Two males were found on tree trunks near the water, each holding in the chelicerae a small prey wrapped in silk. This is the second confirmed observation of the nuptial gift behavior in the family Trechaleidae, first in the genus Trechalea Thorell, 1869, and later in Paratrechalea Carico, 2005 from southern Brazil. This new observation could be used in phylogenetic and evolutionary studies for this poorly studied spider family.

Se presenta el primer registro de un regalo nupcial en Trechalea amazonica F.O.P - Cambridge, 1903. Las observaciones se hicieron en el pantanal de Oriximiná, Pará, Brasil. Se encontraron dos machos en troncos de árboles cerca del agua, cada uno cargando en los quelíceros una presa pequeña envuelta en seda. Ésta es la segunda observación confirmada del comportamiento nuptial del regalo en la familia Trechaleidae, primero en el género Trechalea Thorell, 1869, y más adelante adentro Paratrechalea Carico, 2005 del Brasil meridional. Esta nueva observación se podría utilizar en estudios filogeneticos y evolutivos para esta familia.

A new species of Enna O. Pickard-Cambridge, 1897 from Cusco, Peru and two new species of Caricelea SILVA & LISE, 2007 based in males collected in Cusco, Peru are described. Enna echarate sp. nov. can be distinguished from other species by the two lateral excavations on the epigynal middle field. Caricelea apurimac sp. nov. an be distinguished from the other members of the genus, by the larger lamellar projection (LP) on the median apophysis that covers most of the guide. Caricelea camisea sp. nov. can be distinguished from other species of the genus, by the smaller lamellar projection and the smaller and acute ental division of the retrolateral apophysis. The males of Hesydrus caripito Carico, 2005 and Syntrechalea reimoseri (Caporiacco, 1947) are described and illustrated for the first time. Trechalea numida Mello-Leitão, 1943 and Trechalea limai Mello-Leitão, 1941 are transferred to Thaumasia Perty, 1833 (Pisauridae) and Paratrechalea Carico, 2005 (Trechaleidae) as species inquirenda and nomen dubium, respectively. New records of Hesydrus aurantius (Mello-Leitão, 1942), Hesydrus caripito Carico, 2005, Enna maya Silva, Lise & Carico, 2008 and Syntrechalea reimoseri (Caporiacco, 1947) from Colombia and Peru are presented.

A new species of the wolf spider genus Arctosa C. L. Koch, 1847 is described and illustrated, based on material collected in Sapiranga, Southern Brazil. Members of Arctosa are known to build burrows in sandy lake shores, but this new species is found under the rocks on the margins of small streams. Females with eggsacs and males can be found all year, being more abundant in the summer period.

Se describe e ilustra una nueva especie del género Arctosa C. L. a Koch, 1848, en base a material procedente de Sapiranga, sur del Brasil. Los miembros de este género por lo general excavan refugios pequeños en los bordes arenosos de los lagos, sin embargo, esta nueva especie se encuentra debajo de rocas en los bordes de rios pequeños. Se puede encontrar hembras con ootecas y machos durante todo el año, aunque son más abundantes en el período del verano.

Pseudattulus incertus Caporiacco, 1955 é sinonimizada com P. kratochvili Caporiacco, 1947 e o macho desta espécie é redescrito. O gênero Uspachus Galiano, 1995 é sinonimizado com Romitia Caporiacco, 1947 e o macho de sua espécie-tipo, R. nigra Caporiacco, 1947, é redescrito.As seguintes combinações novas são estabelecidas para as espécies até o momento incluídas em Uspachus: Romitia albipalpis (Taczanowski, 1878), Romitia andina (Taczanowski, 1878), Romitia bahiensis (Galiano, 1995), Romitia colombiana (Galiano, 1995), Romitia juquiaensis (Galiano, 1995), Romitia ministerialis (C.L. Koch, 1846), Romitia misionensis (Galiano, 1995) e Romitia patellaris (Galiano, 1995). O gênero Pseudamphidraus Caporiacco, 1947 é sinonimizado com Noegus Simon, 1900 pela transferência de sua espécie-tipo, Noegus niger (Caporiacco, 1947) comb. nov., cujo macho é redescrito. As espécies Pseudamphidraus variegatus Caporiacco, 1947 e Marma trifidocarinata Caporiacco, 1947 são sinonimizadas com Marma nigritarsis (Simon, 1900).

Pseudattulus incertus Caporiacco, 1955 is synonymized with P. kratochvili Caporiacco, 1947 and the male of this species is redescribed. The genus Uspachus Galiano, 1995 is synonymized with Romitia Caporiacco, 1947 and the male of its type species, R. nigra Caporiacco, 1947, is redescribed. The following new combinations are established for the species formerly included in Uspachus: Romitia albipalpis (Taczanowski, 1878), Romitia andina (Taczanowski, 1878), Romitia bahiensis (Galiano, 1995), Romitia colombiana (Galiano, 1995), Romitia juquiaensis (Galiano, 1995), Romitia ministerialis (C.L. Koch, 1846), Romitia misionensis (Galiano, 1995) and Romitia patellaris (Galiano, 1995). The genus Pseudamphidraus Caporiacco, 1947 is synonymized with Noegus Simon, 1900 by transfer of its type species, Noegus niger (Caporiacco, 1947) comb. nov., whose male is herein redescribed. The species Pseudamphidraus variegatus Caporiacco, 1947 and Marma trifidocarinata Caporiacco, 1947 are synonymized with Marma nigritarsis (Simon, 1900).

Um novo gênero, Rejanellus, tendo como espécie-tipo Onocolus venustus Bryant, 1940, é estabelecido para quatro espécies da subfamília Stephanopinae, de Cuba e Haiti. A presença de tubérculos dorsais na carapaça do macho é uma possível sinapormorfia para o gênero. As quatro espécies conhecidas até o momento Onocolus venustus Bryant, 1948, O. pallescens Bryant, 1940, O. granulata [sic] Bryant, 1940 e Epicadus mutchleri Petrunkevitch, 1930 são transferidas para o novo gênero. Todas as espécies são redescritas e ilustradas.

A new genus, Rejanellus, type species Onocolus venustus Bryant, 1940, is established for four species of spiders of the subfamily Stephanopinae from Cuba and Haiti. The presence of dorsal tubercles on the male carapace is a possible synapomorphy for the genus. The four known species by now Onocolus venustus Bryant, 1948, O. pallescens Bryant, 1940, O. granulata [sic] Bryant, 1940 and Epicadus mutchleri Petrunkevitch, 1930 are transferred to the new genus. All species are redescribed and illustrated.

Five new species of Nesticus Thorell, 1869 are described: N. potreiro, N. taim from southern Brazil; N. brignolii from southern Brazil, Argentina and Uruguay; N. calilegua from southern Brazil and Argentina and N. ramirezi, from Argentina. The male palpus and female epyginum of N. brasiliensis Brignoli, 1979 are illustrated. Described species were collected in epigean habitats, in shrubs, leaf-litter, under stones, bricks, tiles or debris.

The female of Asaphobelis physonychus Simon, 1902 is described for the firstl time. Some new comments about the male are provided and the palpus is illustrated.