from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Plural form of xenarthran.
Sorry, no etymologies found.
Seventy-two species of mammals occur in this ecoregion including four marsupials, seventeen chiropterans, five xenarthrans, seventeen carnivores, two artiodactyls, and twenty rodents.
This is called the ungual crest and helps anchor the keratinous covering of the claw onto the ungual: it's present in some sloths and anteaters too, and outside of xenarthrans is seen in cats.
Armadillo skeletons - like those of all xenarthrans - are so weird and unfamiliar to us euarchontogliran laurasiatheres that it would be easy to write thousands of words on their weirdness.
This surprises me because I’d always imagined that these were the least interesting mammals: way outclassed by marsupials, monotremes, pangolins, bats and xenarthrans.
Furthermore, while Fox et al. (1992) were careful to exclude other possible contenders (including crocodyliforms, pterosaurs, lizards, xenarthrans and mesonychians) there were a number of Palaeogene mammal groups that they didn’t exclude, and it would have been more convincing had it been shown that these taxa could also be eliminated from comparison (H. - D. Sues, pers. comm.).