ostracoderms In A Sentence
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- He compared them at first with extant armored fish such as catfish and sturgeons but later realizing that they had no movable jaws, classified them in 1844 into a new group " ostracoderms ".
- Ostracoderms have heads covered with a bony shield.
- Among vertebrates, jawless armoured fish ( ostracoderms ) declined in diversity, while the jawed fish ( gnathostomes ) simultaneously increased in both the sea and fresh water.
- The affinities of Palaeospondylus are doubtful, but it is probably related to the contemporaneous armoured ostracoderms.
- The evidence of phylogeny, however, suggests the lamprey lineage diverged much earlier from other vertebrates, rather than arising from among the " ostracoderms ".
- It is now accepted that the precursors of the jawed vertebrates are the long extinct bony ( armoured ) jawless fish, the so-called ostracoderms.
- Ostracoderms existed in two major groups, the more primitive cephalaspids.
Similar words: Oste, Osteoclasts, Ostrava, Ostanes, Osteen, Ostensibly, Ostensory, Osteochondritis, Ostentation, Ostracization, Osteal, Osteitis, Ostersund, Osteotome, Osteogenetic, Ostracode, Osteophytes, Osteogenic, Ostrichlike, Ostriches