Coronatella Dybowsky & Grochowski 1894

Identification key of American species of Coronatella 1a Posteroventral corner of carapace with denticles............................................2 (monacantha - group) 1b Posteroventral corner of carapace without denticles.......................................................... 3 2a One denticle on the posteroventral corner of carapace, one denticle on the labral keel, seta on the exopodite of the Limb II reduced...................................................... Coronatella monacantha (Sars, 1901) (Neotropic) 2b Two denticles on the posteroventral corner of carapace, labral keel naked, seta on the exopodite of the Limb II rudimentary................................... Coronatella undata Sousa, Elmoor-Loureiro & Santos, 2015 (Brazil and Colombia) 3a Row of setae on the carapace not reaching the end of the carapace..............................4 (trachystriata -group) 3b Row of setae on the carapace reaches the end of the carapace.................................................. 5 4a IDL setae with basalmost spines similar or slightly shorter than the base width of the respective setae, sixth scraper of second limb with thin spines markedly shorter than width of the scraper base......................................................................................... Coronatella paulinae Sousa, Elmoor-Loureiro & Santos, 2015 (Brazil) 4b IDL setae about two times longer than the width of the base of the respective setae, sixth scraper of second limb with thick spines slightly shorter than the width of the scraper base.................... Coronatella jimenezae sp. nov. (Colombia) 5a Inner spinules on the posterior margin of carapace arranged in groups........................ 6 (circumfimbriata -group) 5b Inner spinules on the posterior margin of carapace not arranged in groups........................................................................................... Coronatella poppei Richard, 1897 (Southern of South America) 6a Postabdominal claw with long and thin setulae on the base............... Coronatella cf. circumfimbriata (Andes, Chile) 6b Postabdominal claw with short spinules on the base.......................................................... 7 7a Postanal margin of postabdomen armed with 6–8 clusters of denticles.................................................................................................... Coronatella circumfimbriata (Megard, 1967) (Nearctic) 7b Postanal margin of postabdomen armed with 5–6 clusters of denticles.................................................................................. C oronatella serratalhadensis Sousa, Elmoor-Loureiro & Santos, 2015 (Brazil)