| Citation | Smithsonian Institution, 2016 Hydractinia monocarpa Allman, 1876. http://collections.si.edu/search/results.htm?q=Hydractinia%09monocarpa [Accessed 08/09/2016]. |
| Ref. | 110549 Smithsonian Institution, 2016 |
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| Named Used as Valid | Hydractinia monocarpa |
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