This genus is endemic to Australia. There are currently 9 described species. Holconia immanis is reported along the entire east coast. These spiders are commonly seen around buildings, their flattened body shape allowing them to hide between sheets of timber or panelling. Holconia immanis is readily identified from the conspicuous black stripe in the anterior half of the abdomen on the dorsal side. Note that the genus Holconia is likely to be collapsed into genus Isopeda in the near future because of a recent DNA study (Agnarsson and Rayor 2013 "A molecular phylogeny of the Australian huntsman spiders: implications for taxonomy and social behaviour" Molecular Phylogenetics and Evolution 69: 895.)
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Holconia immanis has been recorded at: