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| Format: | Artículo científico |
| Sprache: | en |
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Academia Brasileira de Ciências
2016
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| Online-Zugang: | https://www.redalyc.org/articulo.oa?id=32744812006 |
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Inhaltsangabe:
- A new Mammutidae (Proboscidea, Mammalia) from the Late Miocene of Gansu Province, China DIMILA MOTHÉ LEONARDO S. AVILLA DESI ZHAO GUANGPU XIE BOYANG SUN Multidisciplinaria (Ciencias Naturales y Exactas) Miocene Evolution Mammutidae Proboscidea Longirostrine symphysis The “Yanghecun specimen”, a proboscidean specimen represented by a mandible from Miocene of Chin and previously described as Gomphotheriidae, is here reviewed and described as a new genus and species of Mammutidae: Sinomammut tobieni. This taxon is a longirostrine mastodon, lacking lower tusks, and bearing a wide last molar with oblique and non-in flated lophids, broad transverse interlophids, and yoke-like wear figures. Phylogenetic analysis of Mammutidae based on dental and mandibular features recovered S. tobieni as sister group of the mastodon Mammut. The longirostrine condition and the well-developed lower incisors seem to be primitive for Mammutidae, while the brevirostry is the derived condition, probably emerged during the middle Miocene (12-11 Mya). However, two derived conditions are recognized to the lower tusks: the absence of lower tusks ( S. tobieni ) and the occasional presence of vestigial lower tusks ( Mammut ). 2016 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32744812006 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.1 Vol.88