Etacystis
Etacystis communis, colloquially known as the H-animal or aitch, 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.
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Etacystis
Etacystis communis, colloquially known as the H-animal or aitch, 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.
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Etacystis communis, colloquial ...... the Midwestern United States.
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phylum
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47,722,070
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binomial
Etacystis communis
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binomial authority
Nitecki & Schram, 1976
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Etacystis
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genus authority
Nitecki & Schram, 1976
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name
Etacystis communis
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Animalia
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species
E. communis
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Etacystis communis, colloquial ...... the Midwestern United States.
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Etacystis
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Etacystis communis
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