conodont

• Существительное, обозначающее вымершую угреобразную рыбу от позднего кембрия до позднего триаса, известную своими конусообразными зубами, содержащими клеточную кость, или крошечный окаменелый зуб такого организма.

A noun referring to an extinct eellike fish from the late Cambrian to late Triassic periods, known for its cone-shaped teeth containing cellular bone, or the tiny fossilized tooth of such an organism.

1. C2formalscientific

   The tiny, cone-shaped fossil tooth of an extinct primitive vertebrate belonging to the order Conodonta.

   Зуб конодонта

   • The geologist identified a conodont in the limestone sample.
   • Conodonts are used as index fossils for dating rock layers.
   • The microscopic conodont revealed details about ancient marine life.

2. C2formalscientific

   A small, extinct eel-like fish, about 2 inches long, with a finned tail and a notochord, possessing cone-shaped teeth containing cellular bone. It lived from the late Cambrian to the late Triassic period and is considered a possible predecessor of cyclostomes.

   Вымершая угреобразная рыба

   • The conodont is thought to be an early ancestor of modern lampreys.
   • Fossilized remains of the conodont show a primitive notochord structure.
   • Scientists study conodonts to understand early vertebrate evolution.