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 Ceradocus shoemakeri Fox, 1973 Figs 3 , 27C Ceradocus shoemakeri Fox, 1973: 147-152, figs 1-4; LeCroy 2000 : 73, fig. 121. Material examined. Panama • 2.2-7 mm • 1 ♀ ; Bocas del Toro , Hospital Point ; 9.3336°N , 82.218833°W ; depth 15- m, coral rubble and Halimeda ; 6 Aug 2005 ; S. DeGrave leg.; GCRL 6629 • 1 ♀ ; Bocas del Toro , San Cristobal ; 9.284977°N , 82.294533°W ; depth 1-3 m , Halimeda ; 21 June 2023 ; K.N. White leg.; USNM 1703497 • 1 ♂ , 2 ♀ ; Cayo Zapatilla 1; 9.269967°N , 82.0587°W ; depth 10-11 m , coral rubble; 28 June 2023 ; K.N. White leg.; USNM 1703498 . Diagnosis. Antenna 1 accessory flagellum 4- or 5-articulate. Gnathopod 2 sexually dimorphic, right and left sides dissimilar; enlarged side palm oblique with two subquadrate and one triangular projection. Pereopod 7 basis with small posterodistal lobe. Pleosome and urosome dorsally smooth. Epimera 1-3 posterior margins serrate. Telson approximately as long as wide with subapical setae. Figure 3. Ceradocus shoemakeri , male, 2.2 mm, gnathopod 2 weak side lateral, weak gnathopod 2 propodus palm enlarged with setae removed, gnathopod 2 strong side lateral, strong gnathopod 2 propodus palm enlarged with setae removed, epimeron and urosome. Scale bars: 0.5 mm. Distribution. U.S.A.: South Florida from Biscayne Bay to the Dry Tortugas; Apalachee Bay, Perdido Key, Florida ( LeCroy 2000 ); Bahama Islands: Bimini ( Fox 1973 ); Panama: Bocas del Toro (present study). Ecology and remarks. These amphipods are associated with coral rubble, algae, and sponges at depths of 0.5-15 m. Panamanian specimens have a dorsally smooth pleosome and urosome; Fox (1973) mentioned that occasionally there is a mid-dorsal posterior tooth on pleonites 4 and/or 5.