Nototanoides oliveri, a new sponge-dwelling nototanaid tanaidacean (Crustacea Tanaidomorpha, Tanaidacea) from eastern Gulf of Mexico, with an illustrated taxonomic key, and the first record of harpacticoid copepods within the marsupium of ovigerous female tanaids Author Morales-Núñez, Andrés G. Independent research, Wentzville, MO, United States. Author Ramos-Tafur, Gabriel E. Independent researcher, St. Petersburg, FL, United States. text Zootaxa 2023 2023-09-19 5346 3 242 270 http://dx.doi.org/10.11646/zootaxa.5346.3.2 journal article 10.11646/zootaxa.5346.3.2 1175-5326 8390019 AFCD0367-B476-46A5-8670-2A9C8AF083AA Key to the known species (males) of Nototanoides 1. Pleonites with a lateral row of more than 11 simple setae ( Fig. 16M–N ). .......................................... 2 - Pleonites with a lateral row of less than 11 simple setae ( Fig. 16O–P )........................................... 3 2. Cheliped basis lacking mid-ventral process ( Fig. 16Q ). Cheliped merus with round ventral process ( Fig. 16Q ).................................................................................................... N . polytrichus - Cheliped basis with mid-ventral process ( Fig. 16R ). Cheliped merus lacking round ventral process ( Fig. 17R )................................................................................................. N . oliveri sp. nov. 3. Cheliped carpus with mid-ventral process ( Fig. 16S ). Chela with fixed finger bearing a triangular claw ( Fig. 16S )................................................................................................... N . ohtsukai - Cheliped carpus without mid-ventral process ( Fig. 16T ). Chela with fixed finger bearing a rounded tooth ( Fig. 16T )................................................................................................ N . trifurcatus