publication . Article . 2017

Highly derived eutherian mammals from the earliest Cretaceous of southern Britain

Steven Sweetman; Grant Smith; David Martill;
Open Access English
  • Published: 01 Nov 2017 Journal: Acta Palaeontologica Polonica (issn: 0567-7920, eissn: 1732-2421, Copyright policy)
  • Publisher: Institute of Paleobiology PAS
  • Country: United Kingdom
Abstract
Eutherian mammals (Placentalia and all mammals phylogenetically closer to placentals than to marsupials) comprise the vast majority of extant Mammalia. Among these there is a phenomenal range of forms and sizes, but the origins of crown group placentals are obscure. They lie within the generally tiny mammals of the Mesozoic, represented for the most part by isolated teeth and jaws, and there is strongly conflicting evidence from phenomic and molecular data as to the date of origin of both Eutheria and Placentalia. The oldest purported eutherians are Juramaia from the Upper Jurassic of China, and Eomaia and Acristatherium from the Lower Cretaceous, also of China....
Subjects
free text keywords: /dk/atira/pure/core/subjects/earthsci, Earth Sciences, Mammalia, Eutheria, dentition, Early Cretaceous, Purbeck Group, Britain, UK, Fossil man. Human paleontology, GN282-286.7, Paleontology, QE701-760, Eutherian mammals, Cretaceous, biology.organism_classification, biology, Geology
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publication . Article . 2017

Highly derived eutherian mammals from the earliest Cretaceous of southern Britain

Steven Sweetman; Grant Smith; David Martill;