Systematics and Biogeography Monotypic. Phylogenetic affinities may lie with Andeabatis and Trictena of Australia, and the tergal lobe clade of South America (Grehan, 2010). Phassodes distribution possibly unique example of a hepialid present on volcanic islands geographically remote from continental land. This could represent an element of a former Mesozoic western Pacific island arc or sub-continental biota that survived by sequential dispersal over time onto a series of successive volcanic islands. The inclusion of Fiji and Samoan isalnds is a known center of endemism (Heads, 2014)
Biology Immature stages unknown. In the absence of evidence of stem boring, larvae are probably subterranean and feed either on roots or surface ground plants or detritus.
References Bethune-Baker, G.T. 1905.Notes on a small collection of Lepidoptera from the Fiji Islands, with descriptions of some new species. Proceedings of the Zoological Society of London 1905, 88-95. Grehan, J.R. 2010. Structural variants in the morphology of the first abdominal tergite supporting the monophyly of the Latin American genera Cibyra, Druceiella, Pfitzneriella, and Trichophassus (Lepidoptera: Hepialidae). Bulletin of the Buffalo Society of Natural Sciences 39, 43-63. Heads, M.J. 2014. Biogeography of Australasia: A molecular analysis. Cambridge University Press, Cambridge