Family Pachylasmatidae Utinomi 1968 (barnacle)
Thecostraca - Balanomorpha - Pachylasmatidae
Parent taxon: Chthamaloidea according to B. K. K. Chan et al. 2021
See also Chan et al. 2010 and Jones 2007
Sister taxa: Catophragmidae, Chthamalidae, Waikalasmatidae
Subtaxa: Eolasmatinae Eutomolasma Metalasmatinae Pachylasmatinae
Type: Pachylasma
Ecology: stationary epifaunal suspension feeder
Distribution:
• Quaternary of Greece (1 collection)
• Miocene of New Zealand (1), Spain (1)
• Eocene of New Zealand (5)
Total: 8 collections each including a single occurrence