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New altitudinal record of Trichodactylus fluviatilis no Brasil

Trichodactylus fluviatilis (Latreille, 1828) (Decapoda, Trichodactylidae) is a crab species that lives in mountainous rivers and streams at altitudes up to 500m. Its distribution ranges from South America from the Basins of eastern coast of Brazil to basins of the Upper Parana River and Argentina. T...

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Bibliographic Details
Published in:Acta Scientiarum. Biological Sciences (UEM) 2009, Vol.31 (3), p.327
Main Authors: Gomides, Samuel Campos, Novelli, Iara Alves, Santos, Aline Oliveira, Brugiolo, Sonia Sin Singer, Sousa, Bernadete Maria
Format: Report
Language:Spanish
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Summary:Trichodactylus fluviatilis (Latreille, 1828) (Decapoda, Trichodactylidae) is a crab species that lives in mountainous rivers and streams at altitudes up to 500m. Its distribution ranges from South America from the Basins of eastern coast of Brazil to basins of the Upper Parana River and Argentina. The main objective of this study was to register a new occurrence of T. fluviatilis at a Conservation Unit in Juiz de Fora, Minas Gerais and provide a new altitudinal record for this species in Brazil. The samples were taken between October 2004 and July 2005. We collected three live T. fluviatilis individuals--two males and one female. We also analyzed the stomach contents of 16 Hydromedusa maximiliani specimens, of which in six were found Trichodactylidae crab body parts. Most species of Brazilian Trichodactylidae live at elevations until to 500m above sea level. In this study, T. fluviatilis was collected at elevation of 770m above sea level, expanding the range of altitudinal distribution of this species in Brazil. Prior to this study, there were no reports of T. fluviatilis in Juiz de Fora; therefore this study is a new record of this trichodatcylid in Minas Gerais State. Key words: freshwater decapod, altitudinal distribution, Minas Gerais State. Trichodactylus fluviatilis (Latreille, 1828) (Decapoda, Trichodactylidae) e uma especie de caranguejo que habita rios e riachos montanhosos em altitudes ate aproximadamente 500 m. Sua distribuicao ocorre na America do Sul, desde as bacias costeiras da faixa leste do Brasil ate a bacia do alto Parana e na Argentina. O objetivo do presente trabalho foi registrar a ocorrencia de T. fluviatilis em uma Unidade de Conservacao de Juiz de Fora, Minas Gerais, e fornecer um novo registro altitudinal dessa especie no Brasil. As amostras foram obtidas de outubro de 2004 a julho de 2005. Foram coletados tres individuos vivos, dois machos e uma femea da especie. Tambem foram analisados 16 regurgitos estomacais do cagado Hydromedusa maximiliani, dos quais, em seis foram encontrados partes corporais deste crustaceo. Muitas especies de caranguejos do Brasil da familia Trichodactylidae vivem em regioes acima de 500m do nivel do mar. No presente estudo, T. fluviatilis foi coletado a 770 m de altitude, ampliando assim a faixa de distribuicao altitudinal dessa especie no Brasil. Ate o presente estudo nao existiam relatos de T.fluviatilis no municipio de Juiz de Fora, portanto este estudo tambem se constitui em um novo registro desse tr
ISSN:1679-9283
DOI:10.4025/actascibiolsci.v31i3.785