TOMASSINI Rodrigo Leandro
A new fairy armadillo (Cingulata, Chlamyphorinae) from the late Miocene of Argentina: first fossil record of the most enigmatic Xenarthra
BARASOAIN, DANIEL; TOMASSINI, RODRIGO; ZURITA, ALFREDO; MONTALVO, CLAUDIA; SUPERINA, MARIELA
JOURNAL OF VERTEBRATE PALEONTOLOGY
SOC VERTEBRATE PALEONTOLOGY
Lugar: Lawrence; Año: 2020 vol. 39
Recent molecular analyses point out that the evolutionary history of Cingulata (Xenarthra) could be more complex than previously believed. An ancient divergence was proposed for armadillos, recognizing two large monophyletic groups, Dasypodidae (including Dasypodinae) and Chlamyphoridae (including Euphractinae, Tolypeutinae, and Chlamyphorinae). Extant Chlamyphorinae (fairy armadillos) are among the most bizarre, elusive and unknown mammals of the world. Here we report the first accurate fossil record of this enigmatic xenarthran from the late Miocene of the Argentine Pampas in southern South America, which represents a new genus and species (Chlamyphractus dimartinoi gen. et sp. nov.). The phylogenetic analysis reflects the monophyly of the chlamyphorines. It is well supported by several unambiguous synapomorphies and includes the new fossil taxon as a sister group of the two extant species. This new taxon represents the most basal lineage among Chlamyphorinae and increases its diversity. The morphology of the forelimb suggests that it would have been a good digger although, unlike extant species, it would not have had ?fully? subterranean habits.