Caribbean Amphipoda (Crustacea) of Panama. Part II: parvorder Hadziidira Author White, Kristine N. https://orcid.org/0000-0002-5203-1656 Georgia College & State University, Department of Biological and Environmental Sciences, Aquatic Sciences Center, Milledgeville, GA 31061, USA kristine.white@gcsu.edu Author Sir, Sally J. https://orcid.org/0000-0002-1270-1192 Georgia College & State University, Department of Biological and Environmental Sciences, Aquatic Sciences Center, Milledgeville, GA 31061, USA text ZooKeys 2024 2024-03-18 1195 249 296 http://dx.doi.org/10.3897/zookeys.1195.116721 journal article http://dx.doi.org/10.3897/zookeys.1195.116721 1313-2970-1195-249 4868E773FA184196B2075A691987CC8C AD46D7C8FCCB5CB4AD7A21EC55516779 Genus Elasmopus Costa, 1853 Diagnosis. Antenna 1 elongate, at least 1/3 of body length; accessory flagellum 2- or 3- articulate. Mandibular palp article 3 falcate, anterior margin with pectinate setae. Uropod 1 peduncle with basofacial spine; uropod 3 rami subequal in length.