New Specimens of Acyon myctoderos (Metatheria, Sparassodonta) from Quebrada Honda, Bolivia
作者： Russell K. Engelman , Federico Anaya , Darin A. Croft
DOI: 10.5710/AMGH.19.11.2014.2803
关键词: Neogene 、 Paleontology 、 Mammalian carnivores 、 South american 、 Postcrania 、 Biology 、 Genus 、 Metatheria 、 Deciduous dentition 、 Sparassodonta
摘要: Abstract Despite being the dominant group of South American mammalian carnivores for much Neogene, most post-early Miocene sparassodonts (Metatheria) are poorly known. Here, we describe new specimens hathliacynid sparassodont Acyon myctoderos Forasiepi et al. from middle locality Quebrada Honda, Bolivia, including a juvenile specimen that preserves first known DP3. This is unique among in preserving both upper and lower deciduous premolars suggests hathliacynids may have differed borhyaenoid having simultaneous eruption M3 m4 rather than M4/m4. Another Honda tentatively assigned to A. long bones (femur, tibia) this genus, allowing us estimate its body mass (13–17.5 kg) based on postcranial data. These document further morphological ontogenetic variation within as well Sparassodonta whole.
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