†subfamily Diacanthocapsinae O'Dogherty 1994
Polycystinea - Nassellaria - Carpocaniidae
Parent taxon: Carpocaniidae according to P. De Wever et al. 2001
Sister taxa: Carpocanarium, Carpocaniinae, Carpocanobium, Cystophormis
Subtaxa: Annikaella Diacanthocapsa Eastonerius Myllocercion Novodiacanthocapsa Schadelfusslerus Theocapsomma
Type: Diacanthocapsa
Distribution:
• Paleocene of New Zealand (47 collections)
• Cretaceous of Azerbaijan (5), Canada (5: Nunavut), Czechia (1), Germany (2), Italy (12), Japan (21), New Zealand (13), North Pacific (1), Oman (3), Poland (5), the Russian Federation (3), Slovakia (1), Türkiye (1), United States (2: California)
• Jurassic of Japan (3), Oman (2)
Total: 127 collections including 329 occurrences