On the taxonomy of the Neotropical spider genera Dossenus and Dyrines ( Araneae : Lycosoidea : Trechaleidae ) from Brazil

The male of Dossenus guapore Silva, Lise & Carico, 2007 is described and illustrated for the first time, based on material from Bonito, Mato Grosso do Sul, Brazil. The spider genus Dossenus Simon, 1898 is distributed from Panama to southern Brazil and can be distinguished by the other known genera of Trechaleidae by the median dark brown band on the carapace that extends to the abdomen and by the spoon-like shape of the median apophysis of the male palpus. A new species of Dyrines Simon, 1903, D. brescoviti sp. nov., is described and illustrated based on material collected in Sergipe and Parana, Brazil. The representatives of this spider genus are relatively small and can be distinguished from the other genera by the longitudinal dark brown bands on the legs. New records of Dyrines striatipes (Simon, 1898) are presented.

was recently revised by SILVA et al. (2007) and includes two species: D. marginatus Simon, 1898 (type-species) (Trinidad-Tobago, Colombia, Peru, Brazil) and D. guapore Silva, Lise & Carico, 2007 (Panama, Brazil) (PLATNICK 2010).The representatives of this genus are characterized by the median dark brown band on the carapace that extends to the abdomen, the male palpus resembles the ones of Enna O.P. Cambridge, 1897 by the spoon-like shape of the median apophysis of the male palpus, the female epigynum presents a slightly projected scape (SILVA et al. 2007).
Dyrines Simon, 1903 was recently revised by CARICO & SILVA (2008) and now includes only three species: Dyrines striatipes (Simon, 1898) (type species, Panama to Venezuela), D. ducke Carico & Silva, 2008 (Amazonas, Brazil) and D. huanuco Carico & Silva, 2008 (Huanuco, Peru) (PLATNICK 2010).The representatives of this spider genus are relatively small if compared to other larger species, e.g., Trechalea Thorell, 1869.The main character that can be used to separate the specimens of this genus from other species,are the longitudinal dark bands on the legs (CARICO & SILVA 2008).
The distribution of this genus was restricted to the Amazon area, especially in Brazil.The present new record from northeastern Brazil (Bahia) increases the occurrence of the genus.
In this work we describe and illustrate the male of D. guapore from Mato Grosso do Sul, Brazil and a new species of Dyrines from Sergipe, Brazil and new records of Dyrines striatipes are given.

MATERIAL AND METHODS
The material examined is deposited in Instituto Butantan, São Paulo, Brazil (IBSP, A.D. Brescovit) and Museu de Ciências e Tecnologia of Pontifícia Universidade Católica do Rio Grande do Sul (MCTP, A.A. Lise).The nomenclature of the male palpus structures follows CARICO (1993), SILVA et al. (2007) and CARICO & SILVA (2008).All the measurements are in millimeters.The abbreviations related to eye measurements, including diameter, interdistances and median ocular quadrangle are those routinely used in spider descriptions.
Diagnosis.The male of D. guapore resembles the ones of D. marginatus Simon, 1898 by the general shape of the median apophysis and retrolateral tibial apophysis (SILVA et al. 2007, figs 5 and 6), but can be distinguished by the wider base of the ventral division of the median apophysis (VD) (Fig. 1) and by the acute apex of the retrolateral tibial apophysis (Fig. 2).
Remarks.The male can be considered co-specific with the female holotype of D. guapore because the type locality is in the same range of occurrence for the species.Since after the revision, most of the known species were synonymyzed,and only one new species was described at that time (D.guapore).Thus D. marginatus even present a wide distribution from Central America (Panama) to southern Brazil the differences between the two males are very conspicuous.and 7), by the shape of the middle field of the epigynum (Fig. 1), but can be distinguished by the general shape of the spermathecae (Fig. 4), disposition of the accessory spermathecae and by the separated medium septum (Fig. 3).

On the taxonomy of the Neotropical spider genera Dossenus and Dyrines (Araneae: Lycosoidea: Trechaleidae) from Brazil Estevam L. C. da Silva & Arno A. Lise Laboratório
(Simon, 1898) PME 0.21, PLE 0.18; AME-AME 0.09, AME-ALE 0.06, PME-PME 0.27, PME-PLE 0.26, OQA 0.34, OQP 0.58, OQH 0.52.Chelicerae dark brown, bristly, light de Aracnologia, Museu de Ciências e Tecnologia, Pontifícia Universidade Católica do Rio Grande do Sul.Avenida Ipiranga 6681,Prédio 40, Sala 125, Rio Grande do Sul,ABSTRACT.The male of Dossenus guapore Silva, Lise & Carico, 2007 is described and illustrated for the first time, based on material from Bonito, Mato Grosso do Sul, Brazil.The spider genus Dossenus Simon, 1898 is distributed from Panama to southern Brazil and can be distinguished by the other known genera of Trechaleidae by the median dark brown band on the carapace that extends to the abdomen and by the spoon-like shape of the median apophysis of the male palpus.A new species of DyrinesSimon, 1903, D.brescoviti sp.nov., is described and illustrated based on material collected in Sergipe and Paraná, Brazil.The representatives of this spider genus are relatively small and can be distinguished from the other genera by the longitudinal dark brown bands on the legs.New records of Dyrines striatipes(Simon, 1898)are presented.