Everton N. L. Rodrigues

• PhD
• Professor at UNESP - Universidade Estadual Paulista "Júlio de Mesquita Filho"

The linyphiid species Agyneta galapagosensis (Baert, 1990), Erigone autumnalis Emerton, 1882 and Mermessus fradeorum (Berland, 1932) are recorded for the first time on the continental South America. In addition, the distribution data of Neriene redacta Chamberlin, 1925 is expanded. Figures of the habitus, a distribution map of the new records and n...

Tutaibo carita Cajade sp. nov. and Tutaibo sam Cajade sp. nov. are described from Uruguay based on males and females. Illustrations of somatic and sexual characters and a species distribution map are provided. In addition, new records of Tutaibo velox (Keyserling, 1886) are provided. These findings represent the southernmost records for Tutaibo and...

The genus Tekellina Levi, 1957 is currently composed of ten species, six of which are Neotropical. They are small-sized spiders (0.9 to 1.5 mm), with a wide distribution, with a great diversity in the Neotropical Region and well represented in Brazil. In this article, males and females of the species Tekellina bella Marques & Buckup, 1993 and T. cr...

Dubiaranea magatama Cajade, Hagopián & Rodrigues n. sp. is described from Uruguay, and southern Brazil based on males and females from several types of native forests, and a potential distribution for this species is modeled. The predicted model for this species indicates a Pampean province and southern Atlantic Forest biome distribution. Three var...

This paper presents a taxonomic revision of the genus Tullgrenella Mello-Leitão, 1941. Four new species are described: Tullgrenella aisenbergae Marta, sp. nov. (Brazil) (♂♀), T. legalissima Marta & Hagopián sp. nov. (Uruguay) (♀), T. galianoae Marta, sp. nov. (Brazil) (♂♀) and T. sciosciae Marta & Bustamante sp. nov. (Brazil) (♂♀). The males of T....

Agyneta hum Cajade, Rodrigues & Simó n. sp. and Agyneta unguiserrata Cajade n. sp. are described and illustrated from Brazil and Uruguay based on males and females. Males of A. hum differ from the related A. adami (Millidge 1991) by having apical and posterior pocket of paracymbium, presence of dorsal tibial apophysis and the shape and surface of t...

In this paper a new species of Diphya Nicolet, 1849, D. napo sp. nov. is described based on males and females from Ecuador. The female of Diphya bicolor Vellard, 1926 is described and illustrated for the first time and new records are presented. Oarces ornatus Mello-Leitão, 1935 and Azilia eximia (Mello-Leitão, 1940) are synonymized with D. bicolor...

Spiders are usually found through all seasons in the subtropics, but little is known about their seasonality patterns and how they respond to abiotic factors, especially in species-rich regions such as Brazil. We investigated the seasonal variation in spider communities and the possible influence of abiotic factors (e.g., temperature, rainfall) on...

Knowledge on biodiversity is fundamental for conservation strategies. The Brazilian Pampa region, located in subtropical southern Brazil, is neglected in terms of conservation, and knowledge of its biodiversity is fragmented. We aim to answer the question: how many, and which, species occur in the Brazilian Pampa? In a collaborative effort, we buil...

The rhinocricid genus Alcimobolus is a monotypic genus endemic to the Dominican Republic. Herein, we provide a redescription of Alcimobolus domingensis (DeSaussure & Humbert, 1972) based on freshly collected material. In addition, we place Alcimobolus in a phylogenetic context. We performed a parsimony analysis under implied weighting with a total...

Spiders play a key role in the ecological dynamics in riparian habitats. However, most studies on the effects of changes in riparian habitats on spider communities have focused on the conversion of riparian forest to other land uses rather than on a gradient of forest widths. We assessed the community structure of ground-dwelling spiders in riparia...

Salticidae is the largest family of spiders in terms of described species. Chira Peckham & Peckham, 1896 is a genus with a Neotropical distribution, with 13 described species, but only six have both sexes known. Among the described species, 10 occur in Brazil, including Chira simoni Galiano, 1961 that has only the male described. The main objective...

Huriini Simon, 1901 currently consists of six genera and 17 species, distributed exclusively in South America. In this work, the huriine genus Guriurius Marta, Bustamante, Ruiz & Rodrigues, gen. nov. is proposed with two new species herein described: Guriurius minuano Marta, Bustamante, Ruiz & Rodrigues, sp. nov. (type species) and Guriurius nancya...

The present study evaluates the monophyly of Spintharinae with the inclusion of all ten genera listed under subfamily (Brunepisinus; Chrosiothes; Episinus; Janula; Moneta; Neoepisinus; Pycnoepisinus; Spintharus; Stemmops; and Thwaitesia) and establishes the internal relationship among the spintharines genera. We evaluated 107 morphological characte...

Sumampattus Galiano, 1983 comprise three species from South America, the genus is diagnosed by the male palps with an embolus and a cymbial groove with an inclination to the prolateral side, accompanied by a membranous conductor and proximal retrolateral lobe of tegulum distal division, emerging from the dorsal border, moderately turned and twisted...

This paper offers the first cladistic analysis of the poorly known millipede genus Poecilocricus Schubart, 1962, from Brazil. The data set was composed of 18 taxa and 40 morphological characters. We performed a parsimony analysis by exhaustive search (ie; implicit enumeration) under equal weights (EW) in TNT 1.5. One most parsimonious tree with 78...

The spider genus Euryopis Menge, 1868 (Theridiidae) currently comprises 76 described species worldwide and only two described species from Brazil and none for Bolivia. In this paper four new species of Euryopis from Brazil and Bolivia are described and illustrated: Euryopis candiota n. sp.; Euryopis nasuta n. sp.; Euryopis catarinensis n. sp. all f...

The monotipic genus Anokopsis Bauab-Vianna & Soares, 1980 is a junior synonym of Rudra Peckham & Peckham, 1885 by the transference of the type species Anokopsis avitoides to Rudra. The species Rudra dagostinae Braul & Lise, 1999 is a junior synonym of Rudra avitoides new combination. New records are given for Rudra humilis Mello-Leitão, 1945.

We review the genus Erythrocricus Schubart, 1962 based on the type material of the species Erythrocricus sanguineostriatus (Schubart, 1962). We propose a new diagnosis, redescribe the type species, and propose a new synonymy and a new combination. In addition, a male-based key to both species recognized, including Erythrocricus electrofasciatus (Sc...

• Rosette‐shaped plants can amplify the diversity of predator arthropods and act as potential shelters for these animals in grassland ecosystems under grazing effect. • Here we evaluated the contribution of a vertical rosette‐shaped plant (Eryngium horridum) to patterns of spider diversity and functional traits in subtropical grasslands under diffe...

The emergence of anti-predatory strategies for prey survival are ruled by the minimization of the encounters/interactions with potential predators, but at the same time by maximizing the access to limiting resources such as food or mating partners. Cues indicating predatory activity influence decision-making activities in the two-spotted spider mit...

The genus Tullgrenella Mello-Leitão, 1941 presently consists of 13 exclusively Neotropical species. In this paper both sexes of two new species are described from Bolivia: Tullgrenella nadjae sp. nov. and Tullgrenella brescoviti sp. nov. The female of T. guayapae Galiano, 1970 is described and illustrated for the first time. Additionally, new recor...

Most mesostigmatid mites (Arachnida: Parasitiformes) are soil-dwelling predators, feeding predominantly on detritivorous and fungivorous invertebrates. Little is known about the role of environmental and spatial parameters in driving the structure of their local communities. The aim of this study is to assess the relative importance of environmenta...

Three new species of Catharosoma are described from southern Brazil: Catharosoma pedritense n. sp., Catharosoma promatense n. sp., and Catharosoma ibirapuitense n. sp.. New records of three other Catharosoma species, which considerably extend their distributions, are provided, including a redescription of the hitherto particularly poorly-known spec...

Habitat loss is one of the main consequences of landscape transformation by humans. Monitoring biodiversity changes in areas under different management strategies is fundamental for species conservation. Our study is the first to assess the role of forest disturbance history on spider (Araneae) biodiversity in the westernmost portion of the Atlanti...

Ground spiders can reflect the impacts of land-use intensification. In an integrated annual crop-livestock system, the grazing intensification can negatively influence the abundance and richness of ground spiders. We evaluated the difference in abundance, family and species richness, and species composition of ground spiders in the soybean and past...

Rhinocricus Karsch, 1881 has 207 species occurring mainly in the Americas, and more than 60 of them were described from Brazil. The genus was proposed based on the presence of dorsal scobinae on the prozonites. The present study evaluates the monophyly of three species groups previously proposed in Rhinocricus. We evaluated 39 morphological charact...

1. The composition of local assemblages is assembled by an interplay of species sorting, mass effects and dispersal limitation processes. The contributions of assembly processes to metacommunity structure can change with ecosystem type and specificities of the study area. Spider composition is influenced by environmental features such as habitat st...

In this paper a new species of Cryptachaea Archer, 1946 based on males and females is described from Brazilian caves: Cryptachaea pilar Santanna & Rodrigues, new species from the states of Minas Gerais and São Paulo. The females of Cryptachaea parana (Levi, 1963) and C. schneirlai (Levi, 1959) are described and illustrated for the first time. Crypt...

This study aimed to present a list of the species of frugivorous butterflies occurring in Atlantic Forests, in the Conservation Units: National Forest of Chapecó (FLONA), Ecological Station of Mata Preta (ESEC) and State Park of Araucárias (PAEAR) and adjacent forest fragments, located in the western region of the state of Santa Catarina. Three sam...

The spider genus Stemmops O. Pickard-Cambridge, 1894, currently comprises 22 described species. Spiders of this genus are mainly known from the Neotropical Region, but are poorly studied in Brazil. In this paper five new species of Brazilian Stemmops are described: Stemmops murici new species; Stemmops carauari new species; Stemmops carajas new spe...

The genus Rhinocricus Karsch, 1881 currently includes more than 60 species described and registered from Brazil. In this paper, four new species from southern and southeastern Brazil are described and illustrated: Rhinocricus sooretama sp. nov., Rhinocricus bifurcatus sp. nov., Rhinocricus montenegrinus sp. nov., and Rhinocricus fortaleza sp. nov....

This work deals the occurrence confirmation of spider species, genus Loxosceles Heineken & Lowe, 1832, in Pelotas, Rio Grande do Sul, Brazil. L. laeta (Nicolet, 1849) and L. intermedia MelloLeitão, 1934 were the collected species. L. intermedia was the most numerous specie. In Pelotas many specimens were collected, over old books, newspapers and pa...

The spider genus Chrosiothes Simon, 1894 currently comprises 21 described species. Spiders of this genus are mainly known from the Neotropical Region, but are poorly studied in Brazil. In this paper six new species of Chrosiothes are described from Brazil: Chrosiothes diabolicus new species; Chrosiothes carajaensis new species; Chrosiothes cicuta n...

Terrestrial diplopods are a diverse group of invertebrates with important ecosystem roles within soil communities, though information from the Neotropical Region is still scarce. The present study investigates the association between Diplopoda diversity and composition with vegetation structure, based on pitfall trap samples taken from three differ...

The araneid genus Larinia Simon currently includes 56 species, eleven of them with New World distribution (World Spider Catalog, 2016). North American species of the genus were revised first time by Levi (1975) and South American species by Harrod et al. (1991). According to these authors there are four species known from subtropical South America...

Wetlands (e.g. ponds, meadows) can be found in many landscapes, playing an important role in maintaining regional biodiversity and supporting heterogeneous communities. Spiders are diversified predators that are highly influenced by changes in plant community structure, heterogeneous habitats sustain high spider diversity and abundance. We investig...

The spider family Nesticidae includes 233 species in 13 genera and is distributed almost worldwide (World Spider Catalog, 2016). However, the family is still poorly known in the Neotropical Region. The genus Nesticus Thorell, 1869 comprises 132 species and seven subspecies and was described based on N. cellulanus (Clerck, 1757), from Europe (World...

The composition of the spider fauna of riparian forests is insufficiently known. These forests, adjacent to both aquatic and terrestrial environments, are recognised as having important ecosystem functions. We compare the composition of spider assemblages of four riparian forests in different drainage basins, along with their microhabitats (edges a...

Gelanor Thorell, 1969 comprises 11 Neotropical species. In this paper, two new species are described from Brazil: Gelanor hoga sp. nov., based on males and females from the state of Amazonas, and Gelanor cachimbo sp. nov., based on males from the state of Para. Additionally, new records from Brazil are provided for Gelanor altithorax Keyserling, 18...

Neocunaxoides promatae sp. nov., Bonzia flechtmanni sp. nov. and Dactyloscirus multiscutus sp. nov. are described from soil and leaf litter in Atlantic rainforest and Atlantic Araucaria forest in natural environments in São Francisco de Paula municipality, Rio Grande do Sul State, Brazil. In addition, the species Pulaeus quadrisolenidius Castro & D...

The Araneidae is a speciose family including web-spinning spiders that are very abundant in various terrestrial ecosystems. Several studies demonstrate that changes in vegetation surrounding rivers, streams and brooks affect the associated araneofauna. The aim of this research was to compare differences found in diversity (abundance and richness),...

The theridiid genus Thymoites Keyserling, 1884 is distributed worldwide. Spiders of this genus are mainly known from the Neotropical Region, but are poorly studied in Brazil. In this paper nine new species of Thymoites are described from Brazil, one from the state of Alagoas: Thymoites murici n. sp.; two from São Paulo: T. bocaina n. sp., T. ilhabe...

The genus Neonella Gertsch, 1936 contains 12 species with an exclusive New World distribution (World Spider Catalog 2015). The genus was proposed by Gertsch (1936) to include N. vinnula Gertsch, 1936 from Florida and Texas, USA. Remaining species were added by Galiano (1965, 1988, 1998) and, more recently, Edwards (2003), Ruiz & Brescovit (2004), a...

Cryptachaea Archer 1946 currently contains 75 species. The genus is considered related to Achaearanea Strand 1929, Hentziectypus Archer 1946, and Parasteatoda Archer 1946 but differs from them in having a male palp with a short to medium embolus, which is not articulated and not supported on the back of the cymbium; the base is fused to the median...

The spider Latrodectus mirabilis is recorded for Brazil, based on specimens collected in outcrops areas at Área de Proteção Ambiental do Rio Ibirapuitã, Sant’Ana do Livramento, in the state of Rio Grande do Sul. The only species of the genus known from Brazil were L. curacaviensis, L. geometricus and L. mactans.

2014 Sociedade Brasileira de Zoologia | www.sbzoologia.org.br | www.scielo.br/zool All content of the journal, except where identified, is licensed under a Creative Commons attribution-type BY-NC. Among the genera of spiders of Linyphiidae described for South America, Dubiaranea Mello-Leitão, 1943 includes the largest number of species. Currently a...

Riparian forests bordering open terrestrial environments may have three microhabitats differing in structure and conditions: a grassland/pasture-forest edge (GE), a forest interior (FI) and a river–forest edge. The influence of such edge effects and vegetation characteristics on spider diversity of riparian forests was evaluated in Southern Brazil....

Naatlo Coddington, 1986 is diagnosed by the presence of the epigynal flap in the females and the reduced conductor and the more complex embolic tip in the males. In this paper it are described and illustrated two news species from Brazil: N. serrana sp. nov. from state of Rio Grande do Sul and N. maturaca sp. nov. from states of Amazonas, Pará and...

Riparian forests bordering open terrestrial environments may have three microhabitats differing in structure and conditions: a grassland/pasture-forest edge (GE), a forest interior (FI) and a river–forest edge. The influence of such edge effects and vegetation characteristics on spider diversity of riparian forests was evaluated in Southern Brazil....

The adverse effect that insecticides have on spider populations is of major concern since these predators are a component in the biological control of rice insect pest populations. This study was designed to determine the effect of the pyrethroid insecticide, Lambda-cyhalothrin, on spider populations in rice fields. Treatments consisted of plots tr...

The theridiid genus Dipoena Thorell, 1869 is distributed worldwide. Dipoena are recognized by male with carapace often high, cylindrical, with grooves or depression on dorsum; carapace of female rarely modified, sometimes high. In this paper six new species of Dipoena are described from Brazil, one from the state of Mato Grosso do Sul: Dipoena boni...

Establishment of communities is a dynamic process initiated by immigration. Therefore, movements of individuals within a metacommunity are important for maintaining and increasing species distribution. We present results of a small landscape-level experiment that manipulated habitat size and diversity. We examined the rates of colonization of spide...

Linyphiidae is currently the second richest family of spiders in the order Araneae but is poorly known and studied in Brazil, particularly in the northern states. In this contribution we describe a new species of Exechopsis Millidge, 1991 from the State of Amazonas, based on both males and females. The male of Meioneta adami Millidge, 1991 is descr...

The distribution of beta diversity is shaped by factors linked to environmental and spatial control. The relative importance of both processes in structuring spider metacommunities has not yet been investigated in the Atlantic Forest. The variance explained by purely environmental, spatially structured environmental, and purely spatial components w...

List of web-spider species. List of the web-spider species found in 16 fragments of Atlantic Forest in southern Brazil. Data are ordered by decreasing abundance. (PDF)

The spider family Linyphiidae is poorly known from many countries in South America, including Peru. In this paper we describe a new species of Asemostera Simon, 1898, Asemostera dianae new species, from Madre de Dios, the males of Meioneta lauta Millidge, 1991 and Meioneta oculata Millidge, 1991, and the female of Myrmecomelix pulcher (Millidge, 19...

Hentziectypus tayrona sp. nov. is described based on a male from Santa Marta, Colombia. The female of H. rafaeli Buckup & Marques, 1991, is described for the first time and the distribution range is extended to Bolivia and South of Brazil.

Hentziectypus tayrona sp. nov. is described based on a male from Santa Marta, Colombia. The female of H. rafaeli Buckup & Marques, 1991, is described for the first time and the distribution range is extended to Bolivia and South of Brazil.

We evaluated spider guild abundance and vegetation complexity in riparian forests in southern Brazil in four distinct river basins over 2 yr. We compared spider guild abundance among rivers, habitats (edges vs. forest interior), and against vegetation complexity. We also compared spider assemblages between juvenile and adults in terms of guilds. Of...

Three species of Cryptachaea Archer, 1946 are described, two of them from Brazil: C. amazonas sp. nov. from Reserva Florestal Adolpho Ducke, Manaus, Amazonas, and C. maldonado sp. nov. from Base de Operações Geólogo Pedro de Moura, Porto Urucu, Urucu River, Coari, Amazonas, based only on males. A new association of male and female for Achaearanea h...

In this paper seven new species of Latonigena Simon, 1893 are described, including the first descriptions of males of this genus. Latonigena beni sp. nov. is described from Bolivia and Brazil and six species are described exclusively from Brazil: L. colombo sp. nov. from Paraná; L. lami sp. nov. from Paraná and Rio Grande do Sul; L. santana sp. nov...

Three species of Cryptachaea Archer, 1946 are described, two of them from Brazil: C. amazonas sp. nov. from Reserva Florestal Adolpho Ducke, Manaus, Amazonas, and C. maldonado sp. nov. from Base de Operações Geólogo Pedro de Moura, Porto Urucu, Urucu River, Coari, Amazonas, based only on males. A new association of male and female for Achaearanea h...

Until now no species of Rhinocricus have been described or registered for the state of Rio Grande do Sul, Brazil. In this work we describe and illustrate five new species of Rhinocricus from Rio Grande do Sul: R. itauba sp. nov., R. gauchus sp. nov., R. guaritas sp. nov., and R. serranus sp. nov., described from specimens of both sexes, and R. vaca...

Sphecozone O.P.-Cambridge, 1870 includes small to median spiders with 1.4–4.2 mm body size. Known exclusively from the Americas, 34 species are recognized, 14 of them are present in Brazil (Platnick 2011). The female of S. rostrata Millidge, 1991 is described and illustrated for the first time. The male of S. rostrata and both sexes of S. personata...

Neopisinus gen. nov. é proposto com designação da espécie-tipo Neopisisnus fiapo sp. nov., com base em ambos os sexos, do Rio Grande do Sul, Brasil. Neopisinus distingue-se de todos os gêneros de Spintharinae pelo palpo do macho com enorme condutor trífido, com duas projeções afiladas e uma com ápice bifurcado; pela forma característica da apófise...

The genus Eilica Keyserling, 1891 is worldwide distributed including 28 species (Platnick, 2011). South American Eilica are represented by 10 species of which seven are known by more meridional distribution: E. amambay Platnick, 1985; E. maculipes (Vellard, 1925); E. modesta Keyserling, 1891 E. myrmecophila (Simon, 1903); E. pomposa Medan, 2001; E....

Alpaida arvoredo sp. nov. is described based on males and females from Arvoredo Island, Santa Catarina coast, Brazil. The male was described associated to A. hoffmanni Levi, 1988. The correct male of A. hoffmanni is described for the first time. Alpaida caramba sp. nov., based on both sexes, is described from Rio Grande do Sul, Brazil. The males of...

New species of Alpaida (Araneae, Araneidae), complementary descriptions and taxonomic note. Alpaida arvoredo sp. nov. is described based on males and females from Arvoredo Island, Santa Catarina coast, Brazil. The male was described associated to A. hoffmanni Levi, 1988. The correct male of A. hoffmanni is described for the first time. Alpaida cara...

The Araneidae is a speciose family including web-spinning spiders that are very abundant in various terrestrial ecosystems. Sixty-five araneid species from 20 genera were collected during an inventory of riparian forests in southern Brazil. Among these were one new species, described here as Mangora piratini sp. nov. Also discovered were the previo...

A spiders species list including 808 species of 51 families occurring in the state of Rio Grande do Sul, Brazil, is presented. Type locality, municipalities of occurrence and taxonomic bibliography concerning these species are indicated.

List of spiders species (Arachnida, Araneae) of the state of Rio Grande do Sul, Brazil. A spiders species list including 808 species of 51 families occurring in the state of Rio Grande do Sul, Brazil, is presented. Type locality, municipalities of occurrence and taxonomic bibliography concerning these species are indicated.

Three new species of Cryptachaea Archer, 1946 are described and illustrated based on males and females: Cryptachaea brescoviti sp. nov. from Beni, Bolivia and Bahia and Espírito Santo, Brazil; C. bonaldoi sp. nov. from Minas Gerais, Mato Grosso do Sul and Paraná and C. lisei sp. nov. from São Paulo and Rio Grande do Sul, Brazil. New synonymies prop...

Phoroncidia piratini sp. nov. do estado do Rio Grande do Sul é descrita e ilustrada, com base em espécimes de ambos os sexos. O macho de P. reimoseri Levi, 1964 é descrito e ilustrado pela primeira vez e novos registros são fornecidos. Dados ecológicos de ambas as espécies são apresentados.Phoroncidia piratini sp. nov. from state of Rio Grande do S...

Phoroncidia piratini sp. nov. from state of Rio Grande do Sul is described and illustrated, based on males and females. The male of P. reimoseri Levi, 1964 is described and illustrated for the first time and new records are provided. Ecological data are presented for both species.

The Neotropical genus of spider Eurymorion includes, until now, only two species: E. insigne (Millidge, 1991) and E. nobile (Millidge, 1991); both known only by males from the states of Rio de Janeiro and São Paulo (Southeastern Brazil), respectively. The genus is diagnosed mainly by the male palp with a small paracymbium and by the prolonged and m...

In Brazil, almost nothing is known about the thrips fauna associated with rice crops. This is especially true for Rio Grande do Sul State (RS), the major rice producer in Brazil, where no systematic surveys have been conducted. Thus, this work records preliminarily the species of suborder Terebrantia inhabitanting irrigated rice (RC) and three near...

The Pampa biome in southern Brazil has grassland areas with high biodiversity. Given the fast advance of Eucalyptus silviculture over grassland areas in this biome, and the scant knowledge on the soil spider fauna in these landscapes, we aimed to provide a first view of spiders occurring there and to quantitatively evaluate differences in the spide...

The Neotropical genus Psilocymbium Millidge, 1991 can be recognized by the presence of a non-flagelliform, rigid and spiral shaped embolus, the absence of a cymbial basal excavation on the palp (males), and by having prolonged spermathecae on the epigynum and strong pedipalp setae (females). In this paper Psilocymbium antonina sp. nov., is describe...

The male of Dubiaranea difficilis (Mello-Leitão 1944) is described and illustrated for the first time. New geographic records of this species are provided, and its potential distribution is modeled using MAXENT. The actual and potential distribution of Dubiaranea difficilis proved to be much larger than the hitherto known records. This species inha...

Three new species of Cryptachaea Archer, 1946 are described and illustrated based on males and females: Cryptachaea brescoviti sp. nov. from Beni, Bolivia and Bahia and Espírito Santo, Brazil; C. bonaldoi sp. nov. from Minas Gerais, Mato Grosso do Sul and Paraná and C. lisei sp. nov. from São Paulo and Rio Grande do Sul, Brazil. New synonymies prop...

Four new species of the spider genus Cybaeodamus Mello-Leitão, 1938 are described and illustrated: C. meridionalis sp. nov. from Brazil and Argentina, C. taim sp. nov. from Brazil, Argentina and Uruguay, C. brescoviti sp. nov. and C. tocantins sp. nov. from setentrional region of Brazil. For the species Cybaeodamus enigmaticus (Mello-Leitão, 1939),...

Spiders are one of the most numerous groups of terrestrial predators and these are found in diverse environments such as agroecosystems and nearby areas. Research on spider diversity in agroecosystems is important for following changes in fauna brought about by management. This work evaluated spider richness, abundance, and species composition simi...

The spider diversity associated to a rice field was surveyed along different stages of the culture. The studied area belongs to the Estação Experimental do Arroz (EEA), Instituto Rio Grandense do Arroz (IRGA), Cachoeirinha, state of Rio Grande do Sul, Brazil (50º58'21"W; 29º55'30"S). Between October 2004 and June 2005, 17 samples were taken, distri...

Lepthyphantes noronhensis sp. n. from Fernando de Noronha Island, state of Pernambuco, is described and illustrated. Meioneta galapagosensis Baert, 1990 is recorded for the first time from Brazil and new illustrations and data on natural history are presented.

In this paper, two new species of Labicymbium Millidge, 1991 from Brazil are described: Labicymbium otti sp. nov. and Labicymbium curitiba sp. nov. Specimens of L. otti sp. nov. were collected from the State of Rio Grande do Sul and are characterized by the presence of an distal suprategular apophyses projected, paracymbium with round margin and ra...

Asemostera tacuapi sp. nov. do estado do Rio Grande do Sul é descrita e ilustrada e A. latithorax (Keyserling, 1886) é registrada pela primeira vez para esse estado.

O gênero Nesticella é registrado pela primeira vez para o Brasil. Duas espécies novas são descritas e ilustradas: Nesticella murici sp. nov. da Bahia, Alagoas e Sergipe, com base em espécimes de ambos os sexos, e Nesticella ducke sp. nov. do Amazonas, conhecida apenas pela fêmea.The genus Nesticella is recorded for the first time from Brazil. Two n...

Pseudotyphistes biriva sp. nov. from state of Rio Grande do Sul is described and illustrated. Ecological data of the new species are presented.

The araneofauna of the Neotropical region can be considered undersurveyed and lacking standardized inventories that can be used as a base for biodiversity studies. Spiders are recognized as important components of forest ecosystems and appear to be good organisms for studies concerning biodiversity standards. A survey was carried out in the Parque...