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A hydroid, originally described from the Kei Islands, Moluccas, as Halicornaria allmani (sic!) Marktanner var. sibogae Billard, 1913, was recently rediscovered at two additional Indonesian localities. Since it proves morphologically different from its western Atlantic counterpart, Gymnangium allmanii (Marktanner-Turneretscher, 1890), it is confidently… (More)