The function of wing bullae in mayflies (Insecta: Ephemeroptera) reveals new insights into the early evolution of Pterygota.

Background: Mayflies are basal winged insects of crucial importance for the understanding of the early evolution of Pterygota. Unlike all other insects, they have two successive winged stages, the subimago and the imago. Their forewings feature so-called bullae, which are desclerotized spots in the anterior main veins.

Geographic distribution modeling and taxonomy of (Cothouny Gould, 1846) (Charopidae) reveal potential distributional areas of the species along the Patagonian Forests.

Background: (Couthouy Gould, 1846), an endemic Charopidae from southern South America, was described from few dry shells. The distribution of this species is known on scattering occurrences, mainly from material deposited in museum collections. We provide here new information on anatomy, habitat, and microhabitat preferences and estimate the potential geographic distribution of the species to test if it is exclusively endemic to the Subpolar Magellanic Forest.

The phylogenetic relationships of the two-winged South American Leptophlebiidae genera revisited with first description of the male imago of Bessierus Thomas amp; Orth (Insecta: Ephemeroptera).

Four of the 43 genera of South American Leptophlebiidae are dipterous. A previous phylogenetic hypothesis supported that clade Askola+Hagenulopsis, and that Bessierus+Perissophlebiodes, are sister groups of the Farrodes complex. Adults of Bessierus and Perissophlebiodes were not known but posteriorly Perissophlebiodes male imago was described.

From morphology to molecules: a combined source approach to untangle the taxonomy of (Gastropoda, Odontostomidae), endemic land snails from the Dry Chaco ecoregion.

Background: Land gastropods of the Dry Chaco merit special attention because they comprise a highly diverse but barely studied group. Doering, 1875 are typical inhabitants of this ecoregion. The inclusion of their distribution areas into range, their shell shape similarities, and a former molecular study raised doubts on the monophyly of this genus.

Solaropsis brasiliana, anatomy, range extension and its phylogenetic position within Pleurodontidae (Mollusca, Gastropoda, Stylommatophora).

A detailed anatomical revision on Solaropsis brasiliana (Deshayes 1832) has been carried out. New characters on shell, anatomy of soft parts, and a review of the genus distribution in South America, as well as clarification on S. brasiliana distributional area are provided in the present study.