Pachylasmatidae is a family of symmetrical sessile barnacles in the order Balanomorpha. There are about 10 genera and at least 30 described species in Pachylasmatidae.

Genera These genera belong to the family Pachylasmatidae: Atetrapachylasma Newman & Jones, 2011 Eolasma Buckeridge, 1983 Eurylasma Jones, 2000 Eutomolasma Jones, 2000 Metalasma Jones, 2000 Microlasma Jones, 2000 Neoeolasma Gale, 2020 Pachylasma Darwin, 1854 Pseudoctomeris Poltarukha, 1996 Tetrapachylasma Foster, 1988

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