† ORDER CALANTICOMORPHA ORD. NOV.

Diagnosis: Capitulum with three to five pairs of larger lateral plates; subrostrum and subcarina usually present; smaller laterals variably developed, often absent.

Comment: Calanticomorpha are a paraphyletic assemblage of pedunculate forms, which are sister taxa to the Cretaceous–Recent Scalpellidae; only the Calanticidae survive to the present and represent a morphologically diverse group, which is shown to be monophyletic from molecular analyses (Lin et al., 2015).