Iais#cite ref-WoRMS 4-0

{{Short description|Genus of crustaceans}}

{{For|uses of the acronym|IAIS (disambiguation)}}

{{Automatic taxobox

| taxon = Iais

| authority = Bovallius, 1886 {{ITIS |id=92788 |taxon=Iais}}

| type_species = Jaera pubescens

| type_species_authority = Dana, 1853

}}

Iais is a genus of isopod crustaceans. Iais species are found in association with larger isopods of the family Sphaeromatidae, usually on the ventral surface of the larger animal, between the pereiopods and on the pleopods.{{cite journal |author=D. E. Hurley |title=The New Zealand species of Iais (Crustacea Isopoda) |journal=Transactions and Proceedings of the Royal Society of New Zealand |volume=83 |year=1955 |issue=4 |pages=715–719 |url=http://rsnz.natlib.govt.nz/volume/rsnz_83/rsnz_83_04_010390.html}} They are native to Australasia and South America, although Iais californica and its host Sphaeroma quoyanum have invaded California, and I. californica was first described from Sausalito, California.{{cite journal |author=George Rotramel |title=Iais californica and Sphaeroma quoyanum, two symbiotic isopods introduced to California (Isopoda, Janiridae and Sphaeromatidae) |journal=Crustaceana |year=1972 |volume=Suppl. 3 |pages=193–197 |url=http://decapoda.nhm.org/pdfs/21863/21863.pdf |format=PDF|jstor=25027422}}