2008/09/01 by Yamila Gurovich · 3 citations
Earth and Planetary Sciences · Psychology · Agricultural and Biological Sciences · Dentistry · #Evolution and Paleontology Studies #Primate Behavior and Ecology #Bat Biology and Ecology Studies #Incertae sedis #Clade #Paleontology #Biology #Paleogene #Morphology (biology) #Phylogenetic tree #Zoology #Enamel paint #Cretaceous #Vertebrate paleontology #Evolutionary biology #Taxon #Dentistry
paper · pdf · doi:10.1111/j.1475-4983.2008.00805.x
openalex publication_date 2008/09/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Abstract: The extinct, Cretaceous–Paleogene Gondwanatherians have previously been considered to be early xenarthrans, multituberculates and more recently Mammalia incertae sedis . However, the phylogenetic relationships of Gondwanatheria have yet to be resolved. In this paper, additional dental specimens of the gondwanatherian Sudamerica ameghinoi from the Early Paleocene Salamanca Formation of Argentina are described. These specimens provide additional information on Gondwanatheria affinities, sudamericid morphology and help support earlier hypotheses on Sudamerica dental formula and tooth categories. Sudamericid dental functional morphology and body mass estimates, based on measurements of isolated teeth, are inferred. Dental morphology such as hypsodonty, enamel microstructure and crown features do support a robust clade for Sudamericidae.