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La evolución, la evolución de las cosas. Mejorado: Un roedor tan grande como un búfalo.

R McNeill Alexander1

  • 1Department of Pure and Applied Biology, University of Leeds, Leeds LS2 9JT, UK. r.m.alexander@leeds.ac.uk

Science (New York, N.Y.)
|September 23, 2003
PubMed
Resumen

El roedor vivo más grande, el capibara, es más pequeño que el extinto Phoberomys, un roedor gigante descubierto en Venezuela. Este hallazgo fósil de la época del Mioceno revela una especie de roedor gigante previamente desconocida.

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Área de la Ciencia:

  • Paleontología Paleontología.
  • Zoología Zoología Zoología.
  • Biología de los vertebrados Biología de los vertebrados.

Sus antecedentes:

  • El capibara (Hydrochoerus hydrochaeris) es actualmente el roedor vivo más grande del mundo.
  • Los roedores exhiben una amplia gama de tamaños, desde ratones pequeños hasta especies grandes.

Objetivo del estudio:

  • Para describir un roedor fósil gigante recién descubierto, Phoberomys.
  • Para comparar el tamaño de Phoberomys con roedores existentes como el capibara.

Principales métodos:

  • Análisis de los restos fósiles de Venezuela.
  • Estudios anatómicos comparativos con las especies de roedores modernos.

Principales resultados:

  • Phoberomys, un roedor extinto de la época del Mioceno, era significativamente más grande que el capibara, alcanzando el tamaño de un búfalo.
  • Las evidencias fósiles indican que Phoberomys habitó América del Sur.

Conclusiones:

  • Phoberomys representa un linaje de roedores gigantes previamente desconocido.
  • El descubrimiento desafía las percepciones actuales del tamaño máximo de los roedores y pone de relieve el potencial evolutivo para el gigantismo en los roedores.