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Abstract
Desmopachria is one of the largest genera of Dytiscidae with 104 species described, of which 39 are recorded from Brazil. Two new species of Desmopachria of the D. portmanni group from Brazil are described and illustrated. These new species were collected in temporary shallow pools in tropical forest areas: D. duodentata sp. nov. from Presidente Figueiredo, Amazonas State and D. undulatosterna sp. nov from Teresópolis, Rio de Janeiro State. Both new species have metasternum and metacoxae without punctures, metasternum with horizontal undulated impressions, and metacoxae with vertical undulated impressions. Each species can be diagnosed by the shape of the male genitalia.
Acknowledgements
We thank Dr Renner Baptista for the help with Latin names, Leandro Dumas and Dr Daniela Takiya (DZRJ) for their revision of earlier stages of the manuscript, and N.S. Amparo and S. Jorge for support. Financial support was granted by Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq, Brazil).