João Paulo da Costa, Hermínio Ismael de Araújo-Júnior, Fernando Henrique de Souza Barbosa, Mário André Trindade Dantas
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Record of a juvenile of Ahytherium aureum from the Late Pleistocene of the Brazilian Intertropical Region: radiocarbon dating, isotopic palaeoecology and evidence of predation by a Felidae
Teeth and bone remains belonging to the juvenile Megalonychidae family were found in Engrunado cave (Nova Redenção, Bahia, Brazil). We propose an index between the mesiodistal/vestibulo-lingual measurements of caniniforms and molariforms (Imd/vl) to differentiate isolated teeth of Ahytherium aureum and Australonyx aquae, and based on this index, we suggest that the fossil material belonged to A. aureum. The diaphysis of the right humerus of A. aureum presents biogenic marks assigned to the ichnospecies Nihilichnus nihilicus, suggesting dietary interactions and potential predation by a large felid. Radiocarbon dating and carbon and oxygen isotopic analyses suggest that this individual lived in the region between 36 181 and 41 094 Cal yr
bp, feeding on C3 plant resources (fruit and leaves) in a low-density forest. The revision of radiocarbon dating and carbon and oxygen isotopes for some species found in the Engrunado cave and in the nearby Marota cave enables a climate reconstruction and indicates the maintenance of a forested environment in the region between 15 and 40 kyr.
期刊介绍：
The Journal of Quaternary Science publishes original papers on any field of Quaternary research, and aims to promote a wider appreciation and deeper understanding of the earth''s history during the last 2.58 million years. Papers from a wide range of disciplines appear in JQS including, for example, Archaeology, Botany, Climatology, Geochemistry, Geochronology, Geology, Geomorphology, Geophysics, Glaciology, Limnology, Oceanography, Palaeoceanography, Palaeoclimatology, Palaeoecology, Palaeontology, Soil Science and Zoology. The journal particularly welcomes papers reporting the results of interdisciplinary or multidisciplinary research which are of wide international interest to Quaternary scientists. Short communications and correspondence relating to views and information contained in JQS may also be considered for publication.
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