Ixamatus caldera

{{Short description|Species of spider}}

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| genus = Ixamatus

| species = caldera

| authority = Raven, 1982{{cite journal| last=Raven| first=RJ| year=1982| title=Systematics of the Australian mygalomorph spider genus Ixamatus Simon (Diplurinae: Dipluridae: Chelicerata) |journal=Australian Journal of Zoology |volume=30 |issue= |pages=1035–1067 [1049]|doi= }}

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Ixamatus caldera, also known as the tessellated wishbone spider{{cite web |url= https://bugfrenzy.com.au/product/tesselated-trapdoor-1/ |title= Tesselated wishbone spider (Ixamatus caldera)|author= |date=2023|website= Bug Frenzy|publisher= |access-date= 2023-09-13}} or volcanic ground spider,{{cite web |url= https://uk.inaturalist.org/taxa/830334-Ixamatus-caldera|title= Volcanic Ground Spider Ixamatus caldera|author= |date=2023|website= iNaturalistUK|publisher= |access-date= 2023-09-13}} is a species of mygalomorph spider in the Microstigmatidae family. It is endemic to Australia. It was described in 1982 by Australian arachnologist Robert Raven.{{cite web |url= https://biodiversity.org.au/afd/taxa/f098962c-1de4-4f17-88ab-a8bc1a9e4d02|title=Species Ixamatus caldera Raven, 1982|author= |date=2022-08-05|website= Australian Faunal Directory |publisher=Dept of Climate Change, Energy, the Environment and Water, Australia |access-date=2023-09-13}}