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22 de noviembre de 2024
está vivo, susana
Encontraron un tiburón prehistórico en las costas de Portugal Se trata de un ejemplar considerado un “fósil viviente” por su poca evolución miércoles 15 de noviembre de 2017 09:44 Un auténtico fósil viviente que nada también por otras costas
Científicos del Instituto Portugués del Mar y la Atmósfera encontraron en las costas del Algarve portugués, al sur del país, un ejemplar de Chlamydoselachus anguineus, una especie de tiburón bastante remota y que se considera un 'fósil viviente' porque apenas ha evolucionado desde hace 80 millones de años.
En otras palabras, sus antepasados vieron cómo se extinguían los dinosaurios y cómo los humanos empezaban a habitar la tierra. Este ejemplar, denominado también tiburón anguila o clámide, puede llegar a medir dos metros, tiene unos 300 pequeños dientes muy afilados y una cabeza muy flexible para capturar a sus presas.
El descubrimiento ha sido foco de varias noticias a nivel internacional ya que se cree que este tiburón tan arcaico fue el origen de muchos mitos de monstruos marinos. Y es que el tiburón anguila es difícil de ver, vive de los 200 a los 1.500 metros de profundidad, pero a veces sale a la superficie.
Desde 2007 se han detectado varios ejemplares en Japón, aunque se cree que está extendido de forma aislada por varios puntos desde América hasta Oceanía pasando por la costa portuguesa y gallega.