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Ostracodermi

Ostracodermi

9.9
An extinct group of jawless animals with heavy bony shields from long ago
  • noun
  • /ˌɑstrəkoʊˈdɜrmi/
  • Specialized
translation icon : ostracodermos
  • Unlike modern fish, Ostracodermi lacked jaws and possessed heavy bony shields.

Examples

  • Fossils of Ostracodermi provide insights into the evolution of early jawless vertebrates.

  • The distinctive armor plates of Ostracodermi have fascinated paleontologists since their discovery.

  • Fossils of Ostracodermi provide insights into the early evolution of vertebrates.

  • The Ostracodermi were fascinating creatures of the Paleozoic era.

  • Many fossils of Ostracodermi have been discovered in sedimentary rocks.

  • The bony shields of Ostracodermi are key features that help paleontologists study ancient marine life.

  • Researchers have discovered numerous specimens of Ostracodermi in Paleozoic sedimentary layers.

Synonyms

ostracoderm
vsOstracodermi
  • Specialized
9.9

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

is the formal plural scientific name rather than the common variant form
Osteostraci
vsOstracodermi
  • Specialized
9.9

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

is the broader extinct armored group known for bony shields rather than one subgroup
Heterostraci
vsOstracodermi
  • Specialized
9.9

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

is the more general category emphasizing bony shields across related groups
Cephalaspida
vsOstracodermi
  • Specialized
9.9

An extinct group of early fish with bony head shields

is broader across the Paleozoic and not limited to those specific periods
agnathan
vsOstracodermi
  • Specialized
9.9

A fish-like animal with a backbone and no jaws or paired fins, like lampreys

is a specific extinct armored subgroup rather than all jawless types
jawless vertebrate
vsOstracodermi
  • Specialized
9.7

A long eel-like fish without jaws or paired fins

is a narrower extinct group specialized by heavy armor and bony shields

Surface Forms

Ostracodermi singular
Ostracodermis plural

Morphology

Ostracodermi = ostracoderm (opaque) = ostraco + derm + i

The base term 'ostracoderm' and its parts are specialized combining forms unfamiliar to general learners, so the plural '-i' does not make the meaning derivable for a typical learner.

Etymology

Ostracodermi comes from Greek parts ostraco- meaning 'shell' and derma meaning 'skin'. These were early jawless fish covered in bony shields, so the name is like 'shell-skin' and helps explain their heavy armor.