''Paropsonema'' is an eldonioid known from the Devonian of upstate New York and (if ''P. mirabile'' is a species of ''Paropsonema'' rather than '' Discophyllum'') the Silurian of southern Australia. It is the latest-surviving known member of the Eldonioidea and Cambroernida. A specimen described in 2018 may represent an additional species, but has been tentatively assigned to ''P. cryptohya''; it represents the youngest described paropsonemid. The species ''Discophyllum mirabile'' has been thought to be closer to ''Paropsonema'' than to the sole previously-described species of ''Discophyllum'', ''D. peltata''. As a result, sources treat it as ''Paropsonema mirabile''. Conversely, at least one worker has treated ''P. cryptophya'' as a member of ''Discophyllum'', ''D. cryptophya,'' although this has not been followed by later authors. Regardless, ''Paropsonema'' and ''Discophyllum'' are grouped together informally as "paropsonemids."

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* * * Cambrian invertebrates Cambroernids {{Cambrian-animal-stub