Two new cave-dwelling ground beetle species, Trechus gamae sp. n. and Trechus lunai sp. n., from Portugal, are described. The new species are included in the Trechus fulvus-group by their morphological characters. The work provides diagnostic characters in particular those of the structure of male genitalia, and the distribution of the hypogean species of the fulvus -group at the Estremenho Karstic Massif is mapped. Some comments on the seasonal activity of T. gamae sp. n. are also given. An identification key to the males of the T. fulvus-group species from the Estremenho Karstic Massif is presented, and biogeographical comments are also included.
Reboleira A.S.P.S., Gonçalves F. & Serrano A. (2009). Two new species of cave-dwelling beetles Trechus Clairville of fulvus-group in Portugal. Deutsche Entomologische Zeitschrift, 56(1), 101–107. http://dx.doi.org/10.1002/mmnd.200900009