Andasta siltte

{{Short description|Species of spider}}

{{Speciesbox

| taxon = Andasta siltte

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| status = CR

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Gerlach, J. |date=2014 |title=Andasta siltte |volume=2014 |page=e.T196505A2458875 |doi=10.2305/IUCN.UK.2014-1.RLTS.T196505A2458875.en |access-date=19 November 2021}}

| authority = Saaristo, 1996{{cite web |title=Taxon details Andasta siltte Saaristo, 1996 |work=World Spider Catalog |publisher=Natural History Museum Bern |url=http://www.wsc.nmbe.ch/species/40383 |accessdate=26 December 2015 }}

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Andasta siltte is a species of ray spider that is endemic to the Seychelles. It is only known from a single specimen from Silhouette Island. It is found in woodlands at the lower edge of cloud forest. It is threatened by habitat deterioration, from invasive plants (especially Cinnamomum verum) and climate change.