MACNBR   00242
MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
capítulos de libros
Título:
Origins, radiations, and distribution of South American mammals: from greenhouse to icehouse worlds
Autor/es:
GOIN FJ; CHORNOGUBSKY L; GELFO JN; WOODBURNE MO; MARTIN T
Libro:
Bones, clones, and biomes: an 80-million year history of Recent Neotropical mammals
Editorial:
The University of Chicago Press
Referencias:
Lugar: CHICAGO; Año: 2012; p. 20 - 50
Resumen:
At least five successive phases in South American mammalian evolution can be envisaged, the oldest one being largely hypothetical: (1) Early Gondwanan (?Late Triassic-Early Cretaceous), mammals of Pangaean (triconodontids with amphilestid affi nities) and Gondwanan (autralosphenids) origin; (2) Late Gondwanan (Late Cretaceous), strong endemism in most lineages of Pangaean (Dryolestida) and Gondwanan (Gondwanatheria) origin; (3) Early South American (?latest Cretaceous-latest Eocene), major radiations within Metatheria and Eutheria; (4) Late South American (early Oligocene-middle Pliocene), standardization of relatively few lineages among metatherians and marked radiation of hypsodont types among South American native ungulates; and (5) Inter-American (late Pliocene-Recent), mixture of North and South American therian lineages, with progressive decline of native faunas. The biotic and abiotic events that triggered these phases include the last global warming event at the beginning of the Late Cretaceous (between phases 1 and 2); an intermittent connection between North and South America by the Late Cretaceous, enabling the First American Biotic Interchange, and the decline of native nontherians (between 2 and 3); global cooling and full development of the Circumpolar Antarctic Current, and arrival of platyrrhines and caviomorphs (between 3 and 4); and fi nally, the Panamanian connection between the Americas and the beginning of the Great American Biotic Interchange (between 4 and 5).