anaspida

• Ordem extinta de vertebrados sem mandíbula (agnatos) que viveu nos períodos Siluriano e Devoniano.

An extinct order of jawless vertebrates, known from the Silurian and Devonian periods.

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1. Extinct jawless vertebratesC2formalscientific

   An extinct order of jawless vertebrates that lived during the Silurian and Devonian periods, characterized by a scaleless body and a series of gill openings.

   Vertebrados sem mandíbula extintos

   • Fossils of Anaspida have been found in marine sediments from the Silurian period.
   • The Anaspida are considered an early group of vertebrates that lacked jaws.
   • Paleontologists study Anaspida to understand the evolution of early fish.