Definition of crossopterygian in English:

crossopterygian

Line breaks: cross|opter¦ygian
Pronunciation: /ˌkrɒsɒptəˈrɪdʒɪən
 
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Zoology

noun

  • A lobe-finned fish, such as the coelacanth.
    More example sentences
    • The sarcopterygians include the lungfish, together with the crossopterygians, which are composed of coelacanths and the extinct rhipidistians.
    • These similarities have prompted evolutionists to confidently declare that crossopterygians evolved into tetrapods.
    • One group of extinct crossopterygians, known as the rhipidistians, are the group thought by most to be the ones that successfully invaded land and gave rise to amphibians.

adjective

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  • Relating to crossopterygians.
    More example sentences
    • Latimeria is a ‘living fossil,’ a single surviving species of the old lineage of crossopterygian fishes.
    • After a light breakfast I studied a draft of a paper that we had just submitted on the new fossil crossopterygian fishes of the Aztec Siltstone.
    • Large Bothriolepis plates were scattered around through the rocks with abundant crossopterygian bones and scales in the top units.

Origin

mid 19th century: from modern Latin Crossopterygii, from Greek krossos 'tassel' + pterux, pterug- 'fin'.

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