Description of a new hypogean species of the genus Trechus Clairville, 1806 from eastern Spain and comments on the Trechus martinezi-lineage (Coleoptera : Adephaga : Carabidae)

Trechus torressalai new species, a cave-dwelling ground beetle from eastern Spain is described. Ecological data are also included. Diverse morphological characters suggest they belong in the Trechus fulvus-group. Detailed study of the aedeagus suggests taxonomic affinities with Trechus martinezi Jeannel, Trechus alicantinus Espa (n) over tilde $ ol, and Trechus beltrani Toribio. The close relationship among these species reveals an adelphotaxon-complex that constitutes the T. martinezi-lineage, exclusive to the north-eastern Betic Mountains. An identification key to the species and biogeographical comments on the T. martinezi-lineage are also included.