Ctenocheloides almeidai sp. nov., a new ghost shrimp from Brazil (Decapoda, Ctenochelidae) Author Anker, Arthur Author Pachelle, Paulo P. G. text Zootaxa 2013 3613 5 482 492 journal article 10.11646/zootaxa.3613.5.4 1ad8aad2-7511-4ea7-80ce-f53c3ff8a3b4 1175-5326 222649 EAED4151-DB27-4ABF-B3C5-6CD804FEFB34 Key to the West Atlantic species of the family Ctenochelidae ( sensu Poore 1994; De Grave et al. 2009) 1. Rostral spine present; eyestalks with small and poorly pigmented cornea........................................ 2 -. Rostral spine absent; eyestalks with well-developed cornea [major chela with pectinate fingers; third maxilliped without exo- pod]...................................................................... Ctenocheloides almeidai sp. nov. 2. Both major and minor chelae with pectinate fingers.............................................. ( Ctenocheles )...3 -. Major chela fingers not pectinate......................................................................... 4 3. Cheliped ischium and merus armed with large, acute teeth on ventral margin; anterolateral teeth strong, sharp; third maxilliped without exopod...................................................................... Ctenocheles holthuisi -. Merus and ischium of chelipeds unarmed; anterolateral teeth obtuse; third maxilliped with exopod..... Ctenocheles leviceps 4. Sixth pleomere with sharp lateral projections; third maxilliped without exopod.................... Dawsonius latispina -. Sixth pleomere without sharp lateral projections; third maxilliped with exopod......................... ( Gourretia )...5 5. Third maxilliped ischium ventrally produced in conspicuous acute tooth; major cheliped ischium armed with large teeth on ventral margin; uropodal exopod without notch.................................................. Gourretia laresi -. Third maxilliped ischium ventrally bluntly produced; major cheliped ischium somewhat rugose, but without large teeth on ventral margin; uropod with notch........................................................... Gourretia biffari