Variations of Mesozooplankton Composition in a Eutrophicated Semi-enclosed System (encerrada Bay, Tierra Del Fuego, Argentina)
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Description of the Earliest Fossil Penguin from South America and First Paleogene Vertebrate Locality of Tierra Del Fuego, Argentina
We report the discovery of the first vertebrate from the Paleogene of Tierra del Fuego (Isla Grande), Argentina, in southernmost South America. The specimen consists of parts of an associated pelvic girdle and limb that are identified as belonging to the penguin stem clade (Aves: Pansphenisciformes). The specimen, from an exposure of the Leticia Formation (late middle Eocene), is the earliest k...
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The objective of this paper is to provide an integrative approach to taxonomic composition and distributional information on the weevil fauna (Coleoptera: Curculionoidea) of the Tierra del Fuego archipelago. A total of 39 species belonging to 17 Curculionidae genera are recorded for the archipelago. Most of these belong to two subfamilies: Entiminae (13 species in four genera) and Cyclominae (2...
متن کاملAlkali basalts and enclosed ultramafic xenoliths near Ushuaia, Tierra Del Fuego, Argentina
At the southernmost part of Tierra del Fuego a few outcrops and erratic boulders of alkali basaltic rocks with ultramafic enclaves have been studied. Alkali basalt plugs or pipes hitherto identified are scarce, and host rocks are constituted by slates that belong to Mesozoic deposition. The petrography, texture and composition of the basalt and xenoliths were investigated by petrographic micros...
متن کاملMicrobial planktonic communities of freshwater environments from Tierra del Fuego: dominant trophic strategies in lakes with contrasting features
JUAN F. SAAD1, M. ROMINA SCHIAFFINO1, ALICIAVINOCUR1,2, INÉS O’FARRELL1, GUILLERMO TELL1 AND IRINA IZAGUIRRE1* 1 DEPARTAMENTO DE ECOLOGÍA, GENÉTICA Y EVOLUCIÓN, FACULTAD DE CIENCIAS EXACTAS Y NATURALES, UNIVERSIDAD DE BUENOS AIRES, IEGEBA (CONICET-UBA), BUENOS AIRES C1428EHA, ARGENTINA AND DEPARTAMENTO DE BIODIVERSIDAD Y BIOLOGÍA EXPERIMENTAL, FACULTAD DE CIENCIAS EXACTAS Y NATURALES, UNIVERSID...
متن کاملTeeth and Bones as Sources of DNA for Genetic Diversity and Sex Identification of Commerson’s Dolphins (Cephalorhynchus commersonii) from Tierra del Fuego, Argentina
Museum specimens are often the only source of genetic material for many species of cetaceans. Most of the protocols that have been developed to extract DNA from teeth and bone samples involve mechanical or chemical disintegration of the material. An alternative method to the mechanical reduction process is presented here for 212 Commerson’s dolphin (Cephalorhynchus commersonii) samples collecte...
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تاریخ انتشار 2011