WoRMS source details
Miglietta, M. P. 2006. Hydractinia antonii sp. nov.: a new, partially calcified hydractiniid (Cnidaria: Hydrozoa: Hydractiniidae) from Alaska. Journal of the Marine Biological Association of the United Kingdom 86: 993-996.
A new partially calcified hydroid species of the Family Hydractiniidae, was found in offshore waters of the Aleutian Islands (Alaska), dredged from the bottom at 139-145 m depth. This is the third known species of extant calcified Hydractiniidae, and it shows a unique colony structure. The base is heavily calcified and the distal parts are ramified and have a solid chitinous structure. Branches are all in one plane and the colony reaches up to 18 cm in height.
Pacific, North East (Warm + cold temperate (boreal))