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Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Subphylum: Crustacea
Superclassis: Multicrustacea
Classis: Malacostraca
Subclassis: Eumalacostraca
Superordo: Peracarida
Ordo: Isopoda
Subordo: Asellota
Superfamilia: Janiroidea

Familia: Janiridae
Genus: Iais
Species: I. antarctica – I. aquilei – I. californica – I. chilense – I. elongata – I. floridana – I. pubescens – I. singaporensis

Iais Bovallius, 1886

Type-species: Iais hargeri Bovallius, 1886 (currently named as Iais pubescens (Dana, 1852))

Jais Cléret, 1973 (unjust. emend.)
Neoectias Winkler, 1992: by Wilson et Wägele, 1994


Bovallius, C. (1886). Notes on the family Asellidae. Bihang till Kongliga Svenska Vetenskaps-Akademiens Handlingar 2 (15): 1–54.
Wilson, G.D.F. & J.-W. Wägele (1994). Review of the family Janiridae (Crustacea: Isopoda: Asellota). Invertebrate Taxonomy 8 (3): 683–747.
Winkler, H. (1992). Neoectias chilense, a new janirid genus and species from Chile (Isopoda, Asellota, Janiridae). Zoologischer Anzeiger 228: 174–181.

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.[3] 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.[4] Nine species are recognised:[5]

Iais aquilei Coineau, 1977
Iais californica (H. Richardson, 1904)
Iais chilensis (Winkler, 1992)
Iais elongata Sivertsen & Holthuis, 1980
Iais floridana Kensley & Schotte, 1999
Iais pubescens (Dana, 1853)
Iais singaporensis Menzies & Barnard, 1951
Iais solangae Coineau, 1985


"Iais". Integrated Taxonomic Information System.
"Genus Iais Bovallius, 1886". Australian Faunal Directory. Department of the Environment, Water, Heritage and the Arts. March 29, 2010. Retrieved April 8, 2010.
D. E. Hurley (1955). "The New Zealand species of Iais (Crustacea Isopoda)". Transactions and Proceedings of the Royal Society of New Zealand. 83 (4): 715–719.
George Rotramel (1972). "Iais californica and Sphaeroma quoyanum, two symbiotic isopods introduced to California (Isopoda, Janiridae and Sphaeromatidae)" (PDF). Crustaceana. Suppl. 3: 193–197. JSTOR 25027422.
Marilyn Schotte (2009). M. Schotte; C. B. Boyko; N. L. Bruce; G. C. B. Poore; S. Taiti; G. D. F. Wilson (eds.). "Iais Bovallius, 1886". World Marine, Freshwater and Terrestrial Isopod Crustaceans database. World Register of Marine Species. Retrieved April 8, 2010.


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