Spiophanes duplex (Chamberlin, 1919) Morants duplex Chamberlin, 1919: 17. Spiophanes missionensis Hartman, 1941: 296 –298, plate 46, figs 17–21.— Johnson, 1984: 6.14–6.15, figs 6.7–6.8.— Gobin, 1990: 43.—Meißner, 2005: 31–36, figs 16–19, table 10. Type locality. California, Balboa, USA. Intertidal. Type material. Holotype (LACM - AHF POLY 0601) (S. missionensis); Holotype: North Pacific Ocean, USA, California, Balboa (33º36´N, 117º54´W), intertidal (MCZ 2165) (= holotype of Morants duplex designated by Chamberlin, 1919). Records. USA: Florida, Alabama, Mississippi, Texas (Johnson, 1984); off Florida; off Apalachicola River (29º37.01’N, 84º17.00’W), in 19 m, (26º46.45’N, 82º30.25’W), in 18 m. Puerto Rico: Barceloneta (18º29.45’N, 66º32.06’W), in 30 m (Meißner 2005). Trinidad and Tobago: Oropuche (Gobin 1990). Remarks. Spiophanes duplex is considered a species of wide distribution (Meißner 2005). The identity of the records from the Grand Caribbean should be confirmed by comparison with the type material.

Published as part of Delgado-Blas, Victor Hugo & Salazar-Silva, Patricia, 2011, Taxonomic catalogue of the Spionidae (Annelida: Polychaeta) of the Grand Caribbean, pp. 39-66 in Zootaxa 2782 on pages 58-59, DOI: 10.5281/zenodo.206833