Etacystis
Carboniferous invertebrate of unclear classification / From Wikipedia, the free encyclopedia
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Etacystis communis, colloquially known as the H-animal or aitch,[1] was a soft-bodied invertebrate that lived in shallow tropical coastal waters of muddy estuaries during the Pennsylvanian geological period, about 300 million years ago. The classification is uncertain: the animal had a unique H-shaped body ranging from 2 to 11 cm long, and researchers have suggested a hemichordate or hydrozoan affinity. Examples of Etacystis have been found only in the Mazon Creek fossil beds of the Midwestern United States.
Quick Facts Scientific classification, Binomial name ...
Etacystis communis | |
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Genus: | Etacystis Nitecki & Schram, 1976 |
Species: | E. communis |
Binomial name | |
Etacystis communis Nitecki & Schram, 1976 | |
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