Chasicotatus was originally described as a monotypic genus based on Chasicotatus ameghinoi Scillato-Yané, 1979, from the upper member of Arroyo Chasicó Formation (Las Barrancas Member, late Chasicoan). An additional species, Chasicotatus peiranoi , was erected by Esteban and Nasif (1996).…

The aim of this paper is to increase the knowledge of the diversity of digenean parasites from birds collected in Formosa Province, Argentina. The helminthological survey of 15 specimens of 6 bird species revealed the presence of 5 digenean species:…

A new freshwater leech species Helobdella fantasmae n. sp. is described. This description is based on the examination of 12 specimens collected in Laguna Fantasma, Bariloche (41° 05'S 71° 28'W), during December 2002. Leeches were found attached to submerged plants.…

In Buenos Aires coasts, sedimentary processes were particularly active during the Quaternary owing to eustatic fluctuations in sea level. As a result, during the late Quaternary transgressions, marine and marginal marine sediments were deposited in the coastal plain. In order…

The Arroyo Rojo deposit is the most important polymetallic, volcanic-hosted massive sulphide close to the town of Ushuaia in the rhyolitic belt of the Andes of the Tierra del Fuego. The deposit occurs in a region with north-verging thrusts and…