Radiolaria - Nassellaria - Amphipyndacidae

Synonym: Protostichocapsa Empson-Morin 1982

Parent taxon: Amphipyndacidae according to P. De Wever et al. 2001

Sister taxa: Amphipternis, Cyrtolagena, Palinandromeda, Parvifasus, Parvifavus, Triversus

Subtaxa: Amphipyndax mediocris, Amphipyndax obesa, Amphipyndax stocki

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Ecology: passively mobile planktonic omnivore