description Symmorium Overview
Symmorium is an extinct genus of cartilaginous fish from the Devonian and Carboniferous periods. Its type species, Symmorium reniforme, was named by Edward Drinker Cope in 1893, and the genus is discussed among symmoriiform or stethacanthid holocephalians. It resembles Stethacanthus in general appearance but lacks that genus's distinctive spine-brush complex on the first dorsal fin, a feature important in identifying these fossil fish.
help Symmorium FAQ
What is Symmorium?
Symmorium is an extinct genus of cartilaginous fish from the Devonian and Carboniferous periods. It is discussed among symmoriiform or stethacanthid holocephalians.
What is the type species of Symmorium?
The type species is Symmorium reniforme. Edward Drinker Cope named it in 1893.
When did Symmorium live?
Symmorium lived during the Devonian and Carboniferous periods of the Paleozoic Era. It is known from the fossil record rather than from living populations.
How is Symmorium related to Stethacanthus?
Symmorium is discussed alongside stethacanthid holocephalians and has been compared with Stethacanthus. Both belong to the extinct group of cartilaginous fishes often studied for unusual body forms.
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