A new species and a new record of Aulacus Jurine (Hymenoptera, Aulacidae) from the North Andean block with a key to Colombian species.

A new species of Aulacus Jurine from the Colombian Andes, A. gracielae Santos & Mazariegos sp. nov.

Species richness under a vertebral stripe: integrative taxonomy uncovers three additional species of lizards (Sauria, Squamata, Gymnophthalmidae) from the north-western Colombian Andes.

The systematic study of biodiversity underlies appropriate inference in most other fields of biological research, yet it remains hampered by disagreements on both theoretical and empirical issues such as the species concept and the operational diagnosis of a species. Both become particularly challenging in those lineages where morphological traits are evolutionarily constrained by their adaptive value. For instance, cryptic organisms often conserve or converge in their external appearance, which hinders the recognition of species boundaries.

One more and one less: a new species of large bromelicolous lizard (Gymnophthalmidae: Anadia) from the Andean cloud forests of northwestern Colombia and the phylogenetic status of Anadia antioquensis.

The genus Anadia (family Gymnophthalmidae) consists of 19 species. It has remained almost taxonomically stable for decades, scarcely observed, in addition to being one of the less sampled gymnophthalmid genera with respect to molecular phylogenies. New Anadia species are discovered at a relatively low pace, and few specimens are found in the field, probably due to the arboreal habits of many low and mid elevation species.

A new species of Pristimantis (Anura: Strabomantidae) with a colourful venter from the cloud forests of Colombian western Andes.

The Terrarana frogs of the genus Pristimantis are acknowledged for their direct development into froglets and for their astonishing species richness, which renders it the anuran genus with the highest number of species. We describe a new species of Pristimantis from the northwestern Andes of Colombia. The species is distributed from an area between 2750-2900 m.