Iviraiva

{{Short description|Genus of spiders}}

{{Automatic taxobox

|taxon=Iviraiva

|authority=Rheims & Brescovit, 2004

|type_species=I. pachyura

|type_species_authority=(Mello-Leitão, 1935)

|subdivision_ranks=Species

|subdivision={{Specieslist

|I. argentina|(Mello-Leitão, 1942) – Brazil, Bolivia, Paraguay, Argentina

|I. pachyura|(Mello-Leitão, 1935) – Brazil, Paraguay, Argentina, Uruguay}}

}}

Iviraiva is a genus of South American tree trunk spiders that was first described by C. A. Rheims & Antônio Brescovit in 2004.{{cite journal|last1=Rheims|first1=C. A.|last2=Brescovit|first2=A. D.|year=2004|title=Revision and cladistic analysis of the spider family Hersiliidae (Arachnida, Araneae) with emphasis on Neotropical and Nearctic species.|journal=Insect Systematics & Evolution|pages=189–239|volume=35|issue=2|doi=10.1163/187631204788912355}} {{as of|2019|05}} it contains only two species: I. argentina and I. pachyura.{{cite journal|title=Gen. Iviraiva Rheims & Brescovit, 2004|website=World Spider Catalog Version 20.0|accessdate=2019-06-07|year=2019|publisher=Natural History Museum Bern|url=http://www.wsc.nmbe.ch/genus/1050|doi=10.24436/2|last1=Gloor|first1=Daniel|last2=Nentwig|first2=Wolfgang|last3=Blick|first3=Theo|last4=Kropf|first4=Christian}}