Abstract
a poorly known monospecific genus of early synapsids; E. intermedium is known only from fragmentary remains found in Nova Scotia and its relationship to other synapsids is unclear; nevertheless, it may be the oldest known synapsid, dated between 311 and 308 Ma; one specimen may have borne neural spines; see also Archaeothyris; Canada, Late Pennsylvanian.
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Carlton, R.L. (2018). E. In: A Concise Dictionary of Paleontology. Springer, Cham. https://doi.org/10.1007/978-3-319-73055-4_5
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DOI: https://doi.org/10.1007/978-3-319-73055-4_5
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