Benthic foraminifera diversity from the south Atlantic Ocean: Tierra del Fuego and surrounding waters (South America).

The present study provides a detailed record of foraminiferal fauna and their ecological implications from surface sediments from Atlantic shelf of Tierra del Fuego, Argentina. The foraminiferal assemblage is mostly composed by four main hyaline genera, such as Cibicidoides, Cibicides, Globocassidulina and Buccella, which allowed the identification of three environmental zones. Zone 1 (Z1, 37 to 90 m) encompasses the eastern Beagle Channel and San Sebastian Bay.

Palaeoenvironmental changes based on foraminifera during the late Holocene at the Beagle Channel, Argentina.

A foraminiferal faunal study was carried out in a Holocene marine section from Arroyo Baliza, located on the northwest coast of the Beagle Channel, to contribute to the knowledge of the palaeoenvironmental conditions during the marine Holocene event. Foraminiferal assemblage was represented by 32 species distributed among 21 genera. The assemblage was dominated by Elphidium macellum (Fichtel & Moll) Elphidium alvarezianum (d'Orbigny), Cribroelphidium excavatum (Terquem) and Buccella peruviana (d'Orbigny), accompanied by Cibicides fletcheri Galloway & Wissler and Cibicidoides dispars (d'Orbigny) in low proportion.