Eleven New Species and a New Genus of Diastylidae (Crustacea: Cumacea) from Australia and One New Species from Canada Author Gerken, Sarah text Records of the Australian Museum 2014 2014-02-26 66 1 1 62 http://dx.doi.org/10.3853/j.2201-4349.66.2014.1601 journal article 10.3853/j.2201-4349.66.2014.1601 2201-4349 4684387 Key to all species of Paradiastylis 1 Telson longer than uropod peduncles ....................................................................... P. capillata —— Telson shorter than uropod peduncles ....................................................................................... 2 2 Telson more than ½ peduncle length ......................................................................................... 3 —— Telson less than ½ peduncle length ........................................................................................... 5 3 Carapace with ridges ......................................................................... P. occidensaustralis n. sp. —— Carapace without ridges, covered in fine spines ....................................................................... 4 4 Telson with distinct post-anal region ....................................................................... P. bathyalis —— Telson tubular, without distinct post-anal region ................................. P. botanybayensis n. sp. 5 Carapace with ridges ................................................................................................................. 7 —— Carapace without ridges ............................................................................................................ 6 6 Carapace with small spines, may be difficult to see ....................................... P. berentsae n. sp. —— Carapace smooth, without spines ............................................................................... P. whitleyi 7 Carapace with 1 lateral ridge .................................................................................. P. culicoides —— Carapace with more than 1 lateral ridge .................................................................................... 8 8 Carapace with 4 lateral ridges .............................................................................. P. brachyuran —— Carapace with 3 lateral ridges ................................................................................................... 9 9 Uropod peduncle much longer than pleonite 6 and telson together .......................................... 10 —— Uropod peduncle shorter than pleonite 6 and telson together ....................................... P. mollis 10 Pereopod 2 carpus shorter than propodus and dactylus together .............................. P. longipes —— Pereopod 2 carpus as long or longer than propodus and dactylus together ......................................................................................................................... P. belone