New Occurrences and a New Genus and Species of ‘toothless’ Odontasteridae (asteroidea) from Australian Waters

Odontasteridae (Asteroidea) are important members of Antarctic faunas.Less wellknown are odontasterid species present outside of high-latitudes, which occur primarily in the deepsea.Multiple new odontasterids were identified from deep-sea settings in Australian waters, including a new genus and species, Marshastra loisetteae gen.nov.sp.nov., from the shelf off Western Australia, and Hoplaster oloughlini sp.nov.from Tasmania and the south Pacific region.A phylogeny of Hoplaster suggests diversification from a Southern Hemisphere setting into the Atlantic and northward as well as across Tasmanian seamounts, indicating diversification into deep-sea habitats from shallower waters.