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Adaptaciones dentales convergentes en mamíferos pseudo-tribosfénicos y tribosfénicos
Zhe-Xi Luo1, Qiang Ji, Chong-Xi Yuan
1Carnegie Museum of Natural History, Pittsburgh, Pennsylvania 15213, USA. luoz@carnegiemnh.org
Nature
|November 2, 2007
Resumen
Un recién descubierto mamífero del Jurásico Medio exhibe avanzados molares pseudo-tribosfénicos junto con características esqueléticas primitivas, desafiando las nociones anteriores de la evolución de los primeros mamíferos. Este hallazgo pone de relieve las diversas adaptaciones dentales en los mamíferos del Mesozoico.
Área de la Ciencia:
- Paleontología Paleontología.
- Biología evolutiva Biología evolutiva.
- Evolución de los mamíferos Evolución de los mamíferos
Sus antecedentes:
- Los molares tribosfénicos son una adaptación clave en los marsupiales basales y placentarios, que facilitan el trituración y molienda.
- Los mamíferos pseudo-tribosfénicos extintos poseen una estructura molar invertida con un pseudo-talónido anterior que recibe un pseudo-protocono.
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