diacanthus, Ichthyocampus Schultz [L. P.] 1943:75, Pl. 8 [Bulletin of the United States National Museum No. 180; ref. 3957] Reef at Alofau, Tutuila Island, American Samoa. Holotype (unique): USNM 116091. •Valid as Phoxocampus diacanthus (Schultz 1943) -- (Dawson 1977:620 [ref. 1066], Dawson 1985:156 [ref. 6541], Paxton et al. 1989:427 [ref. 12442], Senou et al. 1998:2 [ref. 24382], Myers 1999:94 [ref. 23965], Paulus 1999:2271 [ref. 24794], Nakabo 2000:522 [ref. 25086], Randall & Lim in Randall & Lim 2000:604 [ref. 25122], Nakabo 2002:522 [ref. 26001], Allen & Adrim 2003:28 [ref. 26830], Myers & Donaldson 2003:618 [ref. 27495], Randall et al. 2004:10 [ref. 27624], Fricke 2004:53 [ref. 28269], Randall 2005:112 [ref. 28239], Paxton et al. 2006:838 [ref. 29073], Kuiter 2009:268 [ref. 30404], Motomura et al. 2010:88 [ref. 31256], Fricke et al. 2011:376 [ref. 31242], Allen & Erdmann 2012:210 [ref. 31980], Hamilton et al. 2016:Supplement 3 [ref. 35615], Wada et al. 2021:38 [ref. 38521], Moots 2022:488 [ref. 39722], Stiller et al. 2022: Additional file p. 23 [ref. 39142], Allen & Erdmann 2024:227 [ref. 40796]). Current status: Valid as Phoxocampus diacanthus (Schultz 1943). Syngnathidae: Syngnathinae. Distribution: Eastern Indian Ocean, western Pacific: Sri Lanka and Malaysia east to Micronesia, Fiji and Tonga, north to Amami Islands (southern Japan), south to Queensland (Australia). Habitat: marine.