What does galeaspid mean?
Galeaspid means Any of the extinct class †Galeaspida of jawless fish..
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Pronunciation varies by accent · noun
Any of the extinct class †Galeaspida of jawless fish..
An interesting example is provided by the “polybranchic” condition in extinct jawless vertebrate taxa, which display an extremely large number of gills, such as some early Devonian galeaspids and the late Devonian euphaneropids.
The jawless fish (termed ‘agnathans’) evolved and flourished during the Silurian Period (435-410 million years ago). These included bizarre forms with weird bony head armours, such as the bizarre galeaspids from China and the pituriaspids from Australia.
Some 70 million years after this particular galeaspid swam the oceans, fish made another evolutionary leap when they took to life on land.
Use galeaspid when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Galeaspid means Any of the extinct class †Galeaspida of jawless fish..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
An interesting example is provided by the “polybranchic” condition in extinct jawless vertebrate taxa, which display an extremely large number of gills, such as some early Devonian galeaspids and the late Devonian euphaneropids.
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