First cranial remains of a gondwanatherian mammal reveal remarkable mosaicism - PubMed (original) (raw)
. 2014 Nov 27;515(7528):512-7.
doi: 10.1038/nature13922. Epub 2014 Nov 5.
Simone Hoffmann 1, John R Wible 2, E Christopher Kirk 3, Julia A Schultz 4, Wighart von Koenigswald 4, Joseph R Groenke 1, James B Rossie 5, Patrick M O'Connor 6, Erik R Seiffert 1, Elizabeth R Dumont 7, Waymon L Holloway 6, Raymond R Rogers 8, Lydia J Rahantarisoa 9, Addison D Kemp 3, Haingoson Andriamialison 10
Affiliations
- PMID: 25383528
- DOI: 10.1038/nature13922
First cranial remains of a gondwanatherian mammal reveal remarkable mosaicism
David W Krause et al. Nature. 2014.
Abstract
Previously known only from isolated teeth and lower jaw fragments recovered from the Cretaceous and Palaeogene of the Southern Hemisphere, the Gondwanatheria constitute the most poorly known of all major mammaliaform radiations. Here we report the discovery of the first skull material of a gondwanatherian, a complete and well-preserved cranium from Upper Cretaceous strata in Madagascar that we assign to a new genus and species. Phylogenetic analysis strongly supports its placement within Gondwanatheria, which are recognized as monophyletic and closely related to multituberculates, an evolutionarily successful clade of Mesozoic mammals known almost exclusively from the Northern Hemisphere. The new taxon is the largest known mammaliaform from the Mesozoic of Gondwana. Its craniofacial anatomy reveals that it was herbivorous, large-eyed and agile, with well-developed high-frequency hearing and a keen sense of smell. The cranium exhibits a mosaic of primitive and derived features, the disparity of which is extreme and probably reflective of a long evolutionary history in geographic isolation.
Comment in
- Mammalian evolution: A beast of the southern wild.
Weil A. Weil A. Nature. 2014 Nov 27;515(7528):495-6. doi: 10.1038/nature13940. Epub 2014 Nov 5. Nature. 2014. PMID: 25383538 No abstract available.
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