![]() Mastodonts (Proboscidea, Mammalia) from the Late Neogene and Early Pleistocene of the People's Republic of China. The fossil record of the Proboscidea in China is abundant, however, its diversity is still being discovered, as the temporal distribution range of several genera ( Tobien et al. tobieni) e a presença ocasional de incisivos vestigiais ( Mammut).Įvolução Mammutidae Mioceno Proboscidea Sínfise longirrostrina Entretanto, duas condições derivadas são reconhecidas para as presas inferiores de Mammutidae: a ausência destes incisivos ( S. A condição longirrostrina e as presas inferiores bem desenvolvidas seriam primitivas para Mammutidae, enquanto a brevirrostria seria a condição derivada, provavelmente surgida durante o Mioceno médio (12-11 Maa). tobieni como grupo-irmão do mastodonte Mammut. A análise filogenética de Mammutidae foi baseada em características dentárias, cranianas e mandibulares, e recuperou S. Este taxon é um mastodonte longirrostrino, sem presas inferiores, e com terceiro molar largo, com lofidos oblíquos e comprimidos, interlofidos amplos e com figuras de desgaste zigodontes. O "espécime de Yanghecun", uma mandíbula de proboscídeo do Mioceno da China e previamente descrito como Gomphotheriidae, é aqui revisado e descrito como um novo gênero e espécie de Mammutidae: Sinomammut tobieni. tobieni) and the occasional presence of vestigial lower tusks ( Mammut).Įvolution Longirostrine symphysis Mammutidae Miocene Proboscidea However, two derived conditions are recognized to the lower tusks: the absence of lower tusks ( S. 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). tobieni as sister group of the mastodon Mammut. ![]() Phylogenetic analysis of Mammutidae based on dental and mandibular features recovered S. This taxon is a longirostrine mastodon, lacking lower tusks, and bearing a wide last molar with oblique and non-inflated lophids, broad transverse interlophids, and yoke-like wear figures. The "Yanghecun specimen", a proboscidean specimen represented by a mandible from Miocene of China and previously described as Gomphotheriidae, is here reviewed and described as a new genus and species of Mammutidae: Sinomammut tobieni. Tianjin Museum of Natural History, Tianjin 300201, China About the authors Gansu Provincial Museum, Lanzhou 730050, China BOYANG SUN Gansu Industrial Occupational Technology College, Tianshui 741025, China GUANGPU XIE Pasteur, 458, sala 506 A, Urca, 22290-255 Rio de Janeiro, RJ, Brasil DESI ZHAO Pasteur, 458, sala 501, Urca, 22290-255 Rio de Janeiro, RJ, BrasilPrograma de Pós-Graduação em Biodiversidade Neotropical, Universidade Federal do Estado do Rio de Janeiro, UNIRIO, Av. Laboratório de Mastozoologia, Departamento de Zoologia, Universidade Federal do Estado do Rio de Janeiro, UNIRIO, Av. Pasteur, 458, sala 501, Urca, 22290-255 Rio de Janeiro, RJ, Brasil LEONARDO S. Cuvier did not, however, understand what could have led these lost species to die out.Programa de Pós-Graduação em Ciências Biológicas (Zoologia), Museu Nacional/Universidade Federal do Rio de Janeiro, UFRJ, Quinta da Boa Vista, São Cristóvão, s/n, 20940-040 Rio de Janeiro, RJ, BrasilLaboratório de Mastozoologia, Departamento de Zoologia, Universidade Federal do Estado do Rio de Janeiro, UNIRIO, Av. He extrapolated these findings to conclude that there must be a huge number of species that died out over time. Finding evidence of other lost creatures among those remains, Cuvier concluded that they must have belonged to vanished species. Cuvier called these kinds of creatures “espèces perdues,” or “lost creatures.” Cuvier based his theory of lost creatures on his own research into the Ohio and Russia fossils, as well as animal remains from Argentina. Cuvier proposed that the two sets of remains belonged to huge, elephantine creatures-two new animal species, neither one of which had survived. On April 4, 1796, Cuvier delivered a revolutionary lecture in which he discussed the Mastodon remains from Ohio, as well as the remains of a similar creature that had been discovered in Russia. Cuvier lived in Paris at the end of the 18th century, and worked as a lecturer for the Paris Museum of Natural History.
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