†Oncolpia (Polyptycha) Defretin-Lefranc 1960 (glass sponge)
Hexactinellida - Lychniscosa - Callodictyonidae
Alternative spelling: Polyptycha
Full reference: S. Defretin-Lefranc. 1960. Contribution a l'etude des spongiaires siliceux du Crétacé supérieur du nord de la France. Theses presentees a la Faculte des Sciences de Lille 1-178
Parent taxon: Oncolpia according to R. M. Finks et al. 2004
Sister taxon: Oncolpia (Oncolpia)
Subtaxa: Oncolpia (Polyptycha) becksioides
Ecology: stationary epifaunal suspension feeder
Distribution:
• Cretaceous of France (2 collections), the United Kingdom (1)
Total: 3 collections each including a single occurrence