How To Use Ostracoderm In A Sentence
-
Enamel, or enameloid tissue covering tubercles, was clearly described in Ordovician vertebrates such as the ostracoderms.
-
During this period the agnathan and gnathostome fishes, too, gave rise to many distinctive groups: the armoured ostracoderm and placoderms, the bony fishes, and elasmobranchs to populate marine and freshwater environments.
-
[[ostracoderm]] s jawless fish related to present-day [[lamprey]] s and
Conservapedia - Recent changes [en]
-
With their armored head shield and trunk shield composed of overlapping bony plates, the placoderms appear at first glance extremely similar to the ostracoderms (armoured jawless fish).
-
With their armored head shield and trunk shield composed of overlapping bony plates, the placoderms appear at first glance extremely similar to the ostracoderms (armoured jawless fish).
-
The oldest fossil related to all modern vertebrates, the ostracoderm a jawless, bony-plated fish, dates to about 490 million years ago.
Trout and Salmon of North America
-
[[ostracoderm]] s jawless fish related to present-day [[lamprey]]
Conservapedia - Recent changes [en]
-
By the Middle Devonian the armoured jawless ostracoderms were in decline, and instead the jawed fish were undergoing a great evolutionary radiation in both the sea and in freshwater.
-
These were jawless, armored fish informally called ostracoderms, but more correctly placed in the taxon Pteraspidomorphi.
-
If lancelets and the fossil ostracoderms are considered out-groups to living craniates, then the brains of the earliest craniates must have been very small for their body size.