![]() With the reclassification of the latter to the Pholidota order, the orders Cingulata (armadillos) and Pilosa (anteaters and sloths) were classified together in the superorder Xenarthra (odd joints). ![]() Xenarthrans were previously classified in an order termed Edentata, found to be polyphyletic and that also included ant-eating Pangolins. Roque, in American Trypanosomiasis Chagas Disease (Second Edition), 2017 Superorder Xenarthra 31 At least one species ( Zaedyus pichiy) may enter torpor and hibernation. In some cases, they vary according to ambient temperature. Body temperatures of Xenarthra are low and variable. 31 This should be taken into account when medicating them, as drug metabolism may be reduced. They descend to the ground about once a week to defecate.Īll Xenarthra have low basal rates of metabolism that are around 40% to 60% of those expected for their body mass. 22 Sloths have specialized, large stomachs consisting of several chambers, in which bacterial flora breaks down and ferments rough plant material. The most conspicuous morphologic feature of armadillos is the presence of a carapace consisting of ossified dermal tissue covered by epidermal scales. Except for the toothless Vermilingua, xenarthrans have significantly reduced, homodont, continuously growing teeth that lack enamel. Their well-developed claws are used for digging, clinging to tree branches, and defense. The Xenarthra bear several unique anatomic traits such as additional (xenarthrous) joints of lumbar vertebrae fusion of the ischium to the anterior caudal vertebrae a secondary scapular spine extensive retia mirabile in the limbs paired postrenal venae cavae and ossified sternal ribs. Aguilar, Mariella Superina, in Fowler's Zoo and Wild Animal Medicine, VolUnique Anatomy and Physiology
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |