A new hypogean Trechus Clairville (Coleoptera, Carabidae, Trechini) discovered in a non-calcareous Superficial Subterranean Habitat of the Iberian System (Central Spain).

Phylogenetic relationships of Western Mediterranean subterranean Trechini groundbeetles (Coleoptera: Carabidae) ARNAUD FAILLE*, ACHILLE CASALE & IGNACIO RIBERA Phylogeny of Mediterranean hypogean Trechini

X-ray microscopy reveals endophallic structures in a new species of the ground beetle genus Trechus Clairville, 1806 from Baltic amber (Coleoptera, Carabidae, Trechini)

The third fossil species of the genus Trechus Clairville, 1806 is described from Baltic amber: Trechus exhibitorius sp. n. Details of external and internal morphology were analysed using X-ray micro-computed tomography (micro-CT) and important diagnostic features of the internal male genital sac (endophallus) are described in detail for the first time in a fossil ground beetle. Based on these d...

Confirmation of occurrence of Trechus Clairville, 1806 in the Baltic amber forests, with description of a flightless edaphic species, and remarks on Trechoides Motschulsky, 1856 (Coleoptera: Carabidae: Trechini).

The first reliably identified Trechini beetle species from Baltic amber, Trechus balticus sp. n., is described. This new fossil species is most similar to extant species of the Palaearctic Trechus sensu stricto, as well as to the Nearctic Microtrechus Jeannel, 1927. Since the fossil specimen is a female and some important character states cannot be investigated, its true systematic position wit...

Molecular phylogeny of the Trechus brucki group, with description of two new species from the Pyreneo-Cantabrian area (France, Spain) (Coleoptera, Carabidae, Trechinae)

A molecular phylogeny of the species from the Trechus brucki clade (previously Trechus uhagoni group)based on fragments of four mitochondrial genes and one nuclear gene is given. We describe Trechus (Trechus) bouillonisp. n. from the western pre-Pyrenees: Sierras de Urbasa-Andía, Navarra, Spain. The species was collected in mesovoid shallow substratum (mss), a subterranean environment. Molecula...

Two New Highly Specialised Subterranean Beetles from the Velebit Massif (croatia): Velebitaphaenops (new Genus) Giganteus Casale & Jal@i], New Species (coleoptera: Carabidae: Trechini) and Velebitodromus Ozrenlukici Lohaj, Mlejnek & Jal@i], New Species (coleoptera: Cholevidae: Leptodirini)

ACHILLE CASALE1, BRANKO JAL@I]2,3, ROMAN LOHAJ4 & ROMAN MLEJNEK5 Università di Sassari, Dipartimento di Zoologia e Genetica Evoluzionistica, Via Muroni 25, 07100 Sassari, Italy (e-mail: [email protected]; [email protected]) Department of Zoology, Croatian Natural History Museum, Demetrova 1, 10000 Zagreb, Croatia (e-mail: [email protected]) Croatian Biospeleological Society, Demetrova 1, 1000...