New Australian Species of Ampeliscidae (Crustacea: Amphipoda) from the Great Barrier Reef and Eastern Australia with a Key to Australian Species Author Poore, Gary C. B. Museums Victoria, GPO Box 666, Melbourne VIC 3001, Australia Author Lowry, James K. Australian Museum Research Institute, Australian Museum, 1 William Street, Sydney NSW 2010, Australia (deceased 4 November 2021) text Records of the Australian Museum 2023 Rec. Aust. Mus. 2023-12-06 75 4 519 533 http://dx.doi.org/10.3853/j.2201-4349.75.2023.1890 journal article 10.3853/j.2201-4349.75.2023.1890 2201-4349 8580D095-3E88-4FB5-B2D6-5DA6755BB16A Byblis Boeck, 1871 Type species. Byblis gaimardii (Krøyer, 1846) . Remarks . Species of Byblis are distinguished by the presence of setae on the anterior margin of the basis and the spine-like dactylus of pereopod 7. Species number 76 world-wide ( Horton et al ., 2023 ). Lowry & Poore (1989) described the only four species known fromAustralia, largely from extensive collections made by environmental benthic surveys undertaken during the 1970s. Here two more are added from the Great Barrier Reef and another from the continental slope of Queensland . “ Byblis species are rather uniform in design, with character states being found in myriad combinations. This makes it difficult to assign Byblis species to groups and therefore difficult to compare a new species with existing species, since each species shares a different suite of characters with different species” ( Myers, 2012: 5 ). For this reason, the new species are compared only with those from Australia and from the Indo-West Pacific.