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Brescovit A.D.,Laboratorio Especial Of Colecoes Zoologicas | Bonaldo A.B.,Laboratorio Of Aracnologia | Santos A.J.,Federal University of Minas Gerais | Ott R.,Museu de Ciencias Naturais | Rheims C.A.,Instituto Butantan
Bulletin of the American Museum of Natural History | Year: 2012

The new endemic goblin spider genus Predatoroonops is erected for 17 new soft-bodied oonopid species from Brazil: Predatoroonops schwarzeneggeri, sp. nov., is the type species of the genus, P. poncho, sp. nov., P. billy, sp. nov., P. valverde, sp. nov., P. blain, sp. nov., P. maceliot, sp. nov., P. anna, sp. nov., P. rickhawkins, sp. nov., P. dutch, sp. nov., P. dillon, sp. nov., P. vallarta, sp. nov., P. phillips, sp. nov., P. yautja, sp. nov., P. peterharlli, sp. nov., P. mctiernani, sp. nov., P. chicano, sp. nov., and P. olddemon, sp. nov. Males of this new genus are easily diagnosed and separated from other Oonopinae genera by the extremely modified male chelicerae that frontally have median furrows and accentuated projections. The females can be recognized by the genitalia, which have a conspicuous posterior receptaculum, usually exposed between the epigastric folds. An auxiliary character for both sexes could be the presence of very long pairs of ventral spines with pronounced bases on the legs I and II tibiae and metatarsi. The genus is considered endemic and the species are recorded mainly from the Brazilian Atlantic Forest. An identification key is provided for all Predatoroonops species known to date. © 2012 American Museum of Natural History. Source

Bonaldo A.B.,Laboratorio Of Aracnologia | Ruiz G.R.S.,Federal University of Para | Brescovit A.D.,Instituto Butantan | Santos A.J.,Federal University of Minas Gerais | Ott R.,Museu de Ciencias Naturais
Bulletin of the American Museum of Natural History | Year: 2014

A new genus of goblin spiders, Simlops, is proposed for 15 species found in Brazilian and Colombian Amazonia and southern Caribbean (Venezuela and Guyana). The new genus belongs to the Scaphiella complex, a group of Neotropical genera that share a sexually dimorphic condition in which the abdominal dorsal scutum is present in males but absent in females. Simlops is hypothesized to be a monophyletic group united by a unique conformation of the male endites, which present three apical portions, a prolateral, curved process, with laminar apices, a retrolateral process and a median, more dorsal, unsclerotized portion. The species Triaeris bodanus Chickering, 1968, is transferred to Simlops and the female of this species is described for the first time. The remaining 14 species are newly described: S. bandeirante Ott, S. cristinae Santos, S. campinarana Brescovit, S. jamesbondi Bonaldo, S. juruti Bonaldo, S. machadoi Ott, S. miudo Ruiz, S. nadinae Ruiz, S. pennai Bonaldo (type species), S. platnicki Bonaldo, and S. similis Ott, all from Brazilian Amazonia; S. cachorro Ruiz from Colombian Amazonia; S. guatopo Brescovit from Venezuela; and S. guyanensis Santos from Guyana. Copyright © American Museum of Natural History 2014. Source

Araujo C.S.,Federal University of Rio Grande do Norte | Candido D.M.,Instituto Butantan | de Araujo H.F.P.,Federal University of Paraiba | Dias S.C.,Laboratorio Of Aracnologia | Vasconcellos A.,Federal University of Rio Grande do Norte
Zoologia | Year: 2010

Seasonal variations in scorpion activity were investigated during a 24 month period in an area of Caatinga (dryland) vegetation in the state of Paraíba, Brazil. The total number of scorpions captured was correlated with climatic variables and prey abundance. Scorpions were captured monthly using pitfall traps; their potential prey was captured using malaise, beating trays and pitfalls. A total of 104 scorpions were captured, representing four species: the bothriurids Bothriurus asper (Pocock, 1893) (n = 74; 71.2%) and B. rochai (Mello-Leitão, 1932) (n = 20; 19.2%), and the buthids Rhopalurus rochai (Borelli, 1910) (n = 4; 3.8%) and Tityus stigmurus (Thorell, 1876) (n = 1; 1.0%). The sex ratios (male:female) of the two most abundant species were 14:1 for B. asper and 7:1 for B. rochai. The abundance of scorpions captured was significantly correlated with precipitation, real evapotranspiration, and abundance of invertebrates (mainly insects). Scorpion activities, especially those of B. asper and B. rochai, may be closely related to their reproductive cycles. Reproduction apparently reaches its maximum when there is an abundance of food, which in the Caatinga is strongly associated with rainfall patterns. © 2010 Sociedade Brasileira de Zoologia. Source

Dias S.C.,Laboratorio Of Aracnologia | Carvalho L.S.,Federal University of Piaui | Bonaldo A.B.,Laboratorio Of Aracnologia | Brescovit A.D.,Instituto Butantan
Journal of Natural History | Year: 2010

We present a refinement in the establishment of guilds in Neotropical spiders based on information assessed by assigning different levels of taxa identification, which allowed better descriptions of spiders' ecological diversities. The analyzed data were compiled from three inventories carried out in the States of Amazonas, Piauí and Paraíba, Brazil, representing three Neotropical biomes, Amazonia, Cerrado and Atlantic Forest. The natural history data were summarized in three dendrograms and 11 guilds are proposed. Owing to the great diversity of lifestyles among species into Corinnidae, Ctenidae, Miturgidae, Salticidae, Sicariidae and Theraphosidae, these families were divided into subgroups for the first time. The identification to sub-family level solved most of the problems in the guild establishment for Theraphosidae, Dipluridae, Miturgidae and Sicariidae. Owing to poor taxonomic and ecological knowledge, Salticidae was divided based on collecting method and taxonomic information, whereas Corinnidae, Ctenidae, Lycosidae and Pisauridae required identification to genus for more refined breakdowns. © 2010 Taylor & Francis. Source

Miglio L.T.,Laboratorio Of Aracnologia | Lucas S.M.,Instituto Butantan | Bonaldo A.B.,Laboratorio Of Aracnologia
Zoologia | Year: 2012

The type species of the Neotropical Actinopus, A. tarsalis Perty, 1 833, is redescribed based on material from the type locality, the state of Piaui, Brazil. The species appears to be restricted to northeastern Brazil and is newly recorded from the state of Sergipe. An old record from the state of Rio Grande do Sul is rejected. Actinopus tarsalis differs from other species of the genus by details of the male copulatory bulb: tegular apophysis absent, robust embolar base, inserted basally at a right angle (90°); embolar apices apex flattened and expanded, arrow-shaped in dorsal view. © 2012 Sociedade Brasileira de Zoología. All rights reserved. Source

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