Erinaceusyllis kathrynae

{{Short description|Species of annelid worm}}

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| image =

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| genus = Erinaceusyllis

| species = kathrynae

| authority = San Martín, 2005

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Erinaceusyllis kathrynae is a species belonging to the phylum Annelida.{{cite journal | last1 = San Martín | first1 = G | year = 2005 | title = Exogoninae (Polychaeta: Syllidae) from Australia with the description of a new genus and twenty-two new species | doi = 10.3853/j.0067-1975.57.2005.1438 | journal = Records of the Australian Museum | volume = 57 | issue = 1| pages = 39–152, page(s): 55–57, figs. 11A–G, 12A–E | url = https://www.australianmuseum.net.au/Uploads/Journals/18012/1438.pdf }} It has been found at depths of {{Convert|3–18|m|ft|abbr=on|sigfig=2}} in coral rubble, sponges, and coralline algae on both the west and east coasts of Australia. It is named for Kathryn Attwood of the Australian Museum.