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| | Superfamily Gondwanatherioidea: A Previously Unrecognized Radiation of Multituberculate Mammals in South America -- ... |
 | | New specimens provide evidence that two other South American forms, Gondwanatherium and Sudamerica, are also multituberculates and that they are closely related to Ferugliotherium. |
 | | Gondwanatherium and Sudamerica, each possessing highly specialized hypsodont molars, were previously thought to be the earliest known representatives of the Edentata, to be involved in the origin of edentates, or to represent a previously unknown higher taxon of mammals. |
 | | However, there are detailed similarities in gross dental morphology, enamel microstructure, and inferred direction of jaw movement among Ferugliotherium, Gondwanatherium, and Sudamerica. |
| www.pnas.org /cgi/content/abstract/90/20/9379 (289 words) |
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