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Eritropis opiformis
Taxonomy
Isoarca opiformis was named by Tate (1896). It is not a trace fossil. It is the type species of Eritropis.
It was recombined as Eritropis opiformis by Pojeta and Gilbert-Tomlinson (1977).
It was recombined as Eritropis opiformis by Pojeta and Gilbert-Tomlinson (1977).
Sister species lacking formal opinion data