Rhenanida
Extinct order of fishes / From Wikipedia, the free encyclopedia
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Quick Facts Rhenanida Temporal range: Emsian - Upper Frasnian, Scientific classification ...
Rhenanida | |
---|---|
Gemuendina stuertzi | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | †Placodermi |
Order: | †Rhenanida Broili, 1930 |
Genera | |
†?Ohioaspis |
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Rhenanida ("Rhine (fish)") is an order of scaly placoderms. Unlike most other placoderms, the rhenanids' armor was made up of a mosaic of unfused scales and tubercles. The patterns and components of this "mosaic" correspond to the plates of armor in other, more advanced placoderms, suggesting that the ancestral placoderm had armor made of unfused components, as well.
All rhenanids were flattened, ray-like, bottom-dwelling predators that lived in marine environments.