Assertion: small jawless armored fish | /r/CapableOf | decline in diversity
Facets:
value: during the middle devonian 393–383 ma
type: TEMPORAL
value: among vertebrates
type: OTHER
Source sentences:
text: Among vertebrates, jawless armoured fish (ostracoderms) declined in diversity, while the jawed fish (gnathostomes) simultaneously increased in both the sea and fresh water.
text: During the Middle Devonian 393–383 Ma, the armoured jawless ostracoderm fish were declining in diversity; the jawed fish were thriving and increasing in diversity in both the oceans and freshwater.