Diagnosis
Coelodendridae without frenulum and rhinocanna, no outer lattice mantle. With nasal tubes forked or dichotomously branched.
Species treated:
Coelodendrum flabellatum Haeckel
Coelodendrum furcatissimum Haeckel
Coelodendrum lappaceum Haeckel
Coelodendrum ramosissimum Haeckel
Coelodendrum spinosissimum Haeckel