Alpheus margaritae sp. n. Paratype male, CL 6.5 mm (D, H, I), (CNCR 32595), Female paratype, CL 7.4 mm (A–C, E–G) (EMU-10581); A anterior portion of carapace and cephalic appendages, dorsal view B same in lateral view (setae omitted) C, D third maxilliped E antennular carina F abdomen, lateral view (setae omitted) G telson and uropods, dorsal view (setae partially omitted) H second pleopod I detail of appendices interna and masculina. Scale bars: A–D, F–H 1 mm; E, I 0.2 mm