Beetle mania: Understanding pond aquatic beetles diversity patterns through a multiple-facet approach.

Ecological studies searching for drivers of biodiversity variation have frequently focused on taxonomic richness. However, more aspects of biodiversity, namely diversity facets can be considered to properly assess biotic-environment relationships. Here, we explore the environmental factors that could control the four biodiversity facets of aquatic Coleoptera from 93 regionally sampled Patagonian ponds.

Description of the putative mature larva of the Neotropical genus Stenhelmoides Grouvelle (Coleoptera: Elmidae).

Stenhelmoides Grouvelle is a Neotropical genus of Elmidae and although it exhibits a wide distribution, until now no larvae had been associated with adults of this genus. Larvae, very likely belonging to this genus, were associated based on co-occurrence with adults. Eleven larvae and nine adults were examined from ten localities at altitudes between 30 and 682 m a.

A new species of Stethelmis Hinton (Coleoptera: Elmidae) from Argentina and description of its larva.

A new species of Stethelmis, S. shepardi sp. nov.

Description of the mature larva of (Germain, 1892) and Hinton, 1941 (Coleoptera: Elmidae).

Mature larvae of two species of the riffle beetle genus Austrolimnius Carter & Zeck, 1929 are described and illustrated for the first time: Austrolimnius nyctelioides (Germain, 1892) and A. elatus Hinton, 1941. A larval diagnosis for the genus is presented and both larvae are compared with each other and with the previously described larva of A.

A Tenebrionid beetle's dataset (Coleoptera, Tenebrionidae) from Peninsula Valdés (Chubut, Argentina).

The Natural Protected Area Peninsula Valdés, located in Northeastern Patagonia, is one of the largest conservation units of arid lands in Argentina. Although this area has been in the UNESCO World Heritage List since 1999, it has been continually exposed to sheep grazing and cattle farming for more than a century which have had a negative impact on the local environment. Our aim is to describe the first dataset of tenebrionid beetle species living in Peninsula Valdés and their relationship to sheep grazing.