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osteostracan

osteostracan

9.9
An extinct jawless fish with a heavy armored head from the Devonian period
  • noun
  • /ˌɑːstɪoʊˈstrækən/
  • Specialized
translation icon : osteostraco
  • Fossils of the osteostracan reveal a heavy shield covering its head and forebody.

Examples

  • The osteostracan thrived in the shallow seas of the Devonian period.

  • Some scientists believe that the osteostracan is an evolutionary link to early jawed vertebrates.

  • The osteostracan fossils were discovered in a remote area.

  • Many osteostracans had unique armored features.

  • Fossils of the osteostracan reveal a heavy shield covering its head and forebody.

  • Some scientists believe that the osteostracan is an evolutionary link to early jawed vertebrates.

  • The osteostracan thrived in the shallow seas of the Devonian period.

Synonyms

Osteostraci
vsosteostracan
  • Specialized
9.9

An extinct group of armored, jawless fish that lived a long time ago

is a specific member or genus mainly from the Devonian
cephalaspid
vsosteostracan
  • Specialized
9.9

A jawless fossil fish from the Devonian with a hard shield on its head

is a related term used more generally for Devonian armored jawless fishes
Cephalaspida
vsosteostracan
  • Specialized
9.9

An extinct group of early fish with bony head shields

is narrower and points to a specific Devonian genus
heterostracan
vsosteostracan
  • Specialized
9.9

An extinct jawless fish with bony plates on its head and front body that lived in the sea

is taxonomically different but also armored and jawless
Heterostraci
vsosteostracan
  • Specialized
9.9

A group of armored jawless fish that lived in ancient seas and are now extinct

is more specific, focusing on Devonian armored head types
Ostracodermi
vsosteostracan
  • Specialized
9.9

An extinct group of jawless animals with heavy bony shields from long ago

is narrower, referring to certain Devonian armored head forms
ostracoderm
vsosteostracan
  • Specialized
9.9

A fish without jaws that had heavy bony armor and lived long ago

is focused more on Devonian armored head specimens
anaspid
vsosteostracan
  • Specialized
9.9

A small extinct freshwater fish without jaws that lived long ago and had a bony head

is mainly Devonian and describes larger armored head forms

Surface Forms

osteostracan singular
osteostracans plural

Morphology

osteostracan = osteo + stracan

A technical taxonomic compound built from Greek combining forms; the components are not productive standalone English words, so an average B1 learner cannot reliably derive the meaning.

Etymology

Osteostracan comes from Greek parts osteo- 'bone' and ostracon 'shell'. So the name paints a picture of a 'bony shell' and helps you remember it is an extinct, jawless fish with an armored head.