†family Chondroplidae Wade 1971
Hydrozoa - Hydroida - Chondroplidae
Parent taxon: Chondrophorina according to B. M. Waggoner and A. G. Collins 1995
Sister taxon: Gelenoptron
Subtaxa: Palaelophacmaea
Ecology: passively mobile planktonic suspension feeder
Distribution:
• Cretaceous of Japan (3 collections)
• Cambrian of United States (1: California)
Total: 4 collections each including a single occurrence