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These additions have been used in research related to the Cretaceous–Paleogene extinction event and the ensuing recovery, [6] and to the Anthropocene debate, [5] respectively. However, the ages that stretch into the Cretaceous are sometimes referred to as " North American land vertebrate ages " to reflect the fact that mammals, while still ...
Cronopio is an extinct genus of small insectivorous mammal known from the early Late Cretaceous of the Río Negro region in Argentina. Its only species is Cronopio dentiacutus . [ 1 ] It belongs to the Meridiolestida , an extinct group of mammals widespread in South America during the Late Cretaceous, which are more closely related to modern ...
Late Cretaceous mammals (3 C, 3 P) E. Early Cretaceous mammals (5 C, 7 P) Σ. Cretaceous mammal stubs (112 P) Pages in category "Cretaceous mammals"
Skull of Cronopio. Meridiolestida is an extinct clade of mammals known from the Cretaceous and Cenozoic of South America and possibly Antarctica.They represented the dominant group of mammals in South America during the Late Cretaceous. [1]
Pages in category "Late Cretaceous mammals of North America" The following 18 pages are in this category, out of 18 total. This list may not reflect recent changes .
The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after creta, the Latin word for the white limestone known as chalk.
Smith and others concluded that the Late Cretaceous drop in sea levels constituted the most severe marine regression of the entire Mesozoic Era. [102] D'Hondt and others argued that an asteroid impact at the end of the Cretaceous would not have produced enough acid for acid rain to be a significant factor contributing to the mass extinction. [56]
The Cenozoic is also known as the Age of Mammals because the terrestrial animals that dominated both hemispheres were mammals – the eutherians in the Northern Hemisphere and the metatherians (marsupials, now mainly restricted to Australia and to some extent South America) in the Southern Hemisphere. The extinction of many groups allowed ...