E. praenuntius occurs on the eastern Ellesmere Island, Canada, in what possibly belongs to the Lower Olenellus-zone (430 feet above the basis of the Kane Formation, 6 miles Northwest of the head of Scoresby Bay).
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E. logani was excavated from the Middle Olenellus-zone of the Northwest Territories (type section of the type section of the Sekwi Formation, 0.2 miles Southeast of June Lake, Mackenzie Mountains, and the Illtyd Formation, Wernecke Mountains).
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E. parvifrons was excavated from the Middle Olenellus-zone of the Northwest Territories (type section of the type section of the Sekwi Formation, 0.2 miles Southeast of June Lake, Mackenzie Mountains, and the Illtyd Formation, Wernecke Mountains).
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E. sequomalus is found in the Middle Olenellus-zone of the Northwest Territories (type section of the type section of the Sekwi Formation, 0.2 miles Southeast of June Lake, Mackenzie Mountains).
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E. laxocules occurs in the Middle Olenellus-zone of the Northwest Territories (type section of the type section of the Sekwi Formation, 0.2 miles Southeast of June Lake, Mackenzie Mountains).