argyrostictus, Syngnathus Kaup [J. J.] (ex Kuhl & van Hasselt) 1856:33 [Catalogue of lophobranchiate fish in the collection of the British Museum; ref. 2575] Java, Indonesia. Holotype (unique): RMNH 3849. Appeared first as name only in Kaup 1853:231. •Synonym of Parasyngnathus penicillus (Cantor 1849) -- (Dawson 1981:90 [ref. 21124], Dawson 1984:75 [ref. 21119]). •Valid as Parasyngnathus argyrostictus (Kaup 1856) -- (Araga in Masuda et al. 1984:86 [ref. 6441]). •Synonym of Hippichthys penicillus (Cantor 1849) -- (Dawson 1985:100 [ref. 6541], Kuiter 2009:278 [ref. 30404], Kottelat 2013:303 [ref. 32989]). Current status: Synonym of Hippichthys penicillus (Cantor 1849). Syngnathidae: Syngnathinae. Habitat: freshwater, brackish, marine.