-oidea

• -idea

New Latin, from Latin neuter plural form of -oideus (“resembling”). By surface analysis, -o- +‎ -idea.

-oidea n pl

1. (taxonomy) Used to form names of superfamilies of animals. Name may be conserved when the rank is changed, as to a parv-, infra-, or suborder, or an order or higher rank. Previously used to form names of higher rank, eg, class, which are often conserved

• See Category:mul:Taxonomic names (superfamily)

• -idae
• -aceae

• "-oidea" in Dictionary.com.
• Article 29 in the International Code of Zoological Nomenclature.