Fraser, C. M. (1943). Distribution records of some hydroids in the collection of the Museum of Comparative Zoölogy at Harvard College, with description of new genera and new species. <em>Proceedings of the New England Zoölogical Club.</em> 22: 75-98, pls 15-20. page(s): 79 [details] Available for editors
Schuchert, P.; Choong, H.; Galea, H.; Hoeksema, B.; Lindsay, D.; Manko, M.; Pica, D. (2025). World Hydrozoa Database. Grammaria rigida Fraser, 1943. Accessed at: https://www.marinespecies.org/Hydrozoa/aphia.php?p=taxdetails&id=284953 on 2025-06-05
original descriptionFraser, C. M. (1943). Distribution records of some hydroids in the collection of the Museum of Comparative Zoölogy at Harvard College, with description of new genera and new species. <em>Proceedings of the New England Zoölogical Club.</em> 22: 75-98, pls 15-20. page(s): 79 [details] Available for editors
basis of recordVervoort, W.; Schuchert, P. & van der Land, J. (2000-2007). as a contribution to UNESCO-IOC Register of Marine Organisms. (look up in IMIS) [details]
Present Inaccurate Introduced: alien Containing type locality