A new genus and species of nothrotheriid sloth (Xenarthra, Tardigrada, Nothrotheriidae) from the Late Miocene (Huayquerian) of Peru
2011/01/01 by Gerardo De Iuliis, GERARDO DE IULIIS, Timothy J. Gaudin +2 · 73 citations
Agricultural and Biological Sciences · Earth and Planetary Sciences · #Anatomy #Bat Biology and Ecology Studies #Biology #Clade #Evolution and Paleontology Studies #Genus #Incertae sedis #Late Miocene #Paleontology #Phylogenetic tree #Sister group #Sloth #Tardigrade Biology and Ecology #Xenarthra #Zoology
paper · pdf · doi:10.1111/j.1475-4983.2010.01001.x
published in Palaeontology 54(1), 171-205 (Wiley)
openalex publication_date 2011/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
Abstract
Abstract: The nothrotheriine sloth from riverbank deposits of the Río Acre region of Peru in western Amazonia was originally assigned to Nothropus priscus Burmeister, 1882 . Although relatively complete, with essentially the pes unknown, its description was accompanied only by limited information on its cranial remains. The remains of this sloth, actually of late Miocene age, were extensively prepared. Subsequent analysis indicates that its original assignment is incorrect and that it belongs to a new genus and species, which is distinguished from other nothrotheriines by the following (among other) features: notably domed braincase; depressed, narrow snout; lack of parietal/alisphenoid contact; ulna with prominently projecting anconeal process; distal position of femoral greater trochanter; medial articular condyle of femur butts against patellar trochlea. Phylogenetic analysis places the new genus and species as sister group to the ( Pronothrotherium ( Nothrotheriops + Nothrotherium )) clade.
Citations
Cited by
- The presence of an atavistic caniniform alveolus in Nothrotherium maquinense (Xenarthra, Folivora, Nothrotheriidae)
- Recent Progress and Future Prospects in Fossil Xenarthran Studies, with Emphasis on Current Methodology in Sloth Taxonomy
- The Status of Eucholoeops fronto and E. lafonei (Xenarthra, Folivora, Megalonychidae) in the Systematics of the Early Miocene Eucholoeops (Santa Cruz, Argentina)
- Implication of the presence ofMegathericulus(Xenarthra: Tardigrada: Megatheriidae) in the Laventan of Peruvian Amazonia
- Phylogeny, Macroevolutionary Trends and Historical Biogeography of Sloths: Insights From a Bayesian Morphological Clock Analysis
- Two new megalonychid sloths (Mammalia: Xenarthra) from the Urumaco Formation (late Miocene), and their phylogenetic affinities
- Recognition of a new nothrotheriid genus (Mammalia, Folivora) from the early late Miocene of Achiri (Bolivia) and the taxonomic status of the genus Xyophorus
- Palaeoproteomics resolves sloth relationships
- New cranio-dental remains of Nothrotheriinae (Mammalia, Xenarthra, Folivora) from the Late Miocene of Central Argentina
- New mammalian and avian records from the late Eocene La Meseta and Submeseta formations of Seymour Island, Antarctica
- A new genus of megalonychid ground sloth (Mammalia, Xenarthra) from the late Pleistocene of Quintana Roo, Mexico
- Unexpected record of the aquatic sloth Thalassocnus (Mammalia, Xenarthra, Folivora) in the upper Neogene of the Puna (Jujuy, Argentina)
- Osteology and Functional Morphology of the Axial Postcranium of the Marine Sloth Thalassocnus (Mammalia, Tardigrada) with Paleobiological Implications
- Western Amazonia as a Hotspot of Mammalian Biodiversity Throughout the Cenozoic
- Recent Advances on Variability, Morpho-Functional Adaptations, Dental Terminology, and Evolution of Sloths
- Cranial osteology of the pampathere Holmesina floridanus (Xenarthra: Cingulata; Blancan NALMA), including a description of an isolated petrosal bone. [europepmc]
- New mammalian and avian records from the late Eocene La Meseta and Submeseta formations of Seymour Island, Antarctica. [europepmc]
- Aquatic sloths ( Thalassocnus ) from the Miocene of Chile and the evolution of marine mammal herbivory in the Pacific Ocean. [europepmc]
Related