Clarke, S. F. 1882. New and interesting hydroids from Chesapeake Bay. Memoirs of the Boston Society of Natural History 3: 135-142, pls 7-9., available online athttps://www.biodiversitylibrary.org/page/7751215 page(s): 136 [details]
Schuchert, P.; Choong, H.; Galea, H.; Hoeksema, B.; Lindsay, D.; Manko, M.; Pica, D. (2025). World Hydrozoa Database. Calyptospadix Clarke, 1882. Accessed through: Marine Species Traits editorial board (2025) Marine Species Traits at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=291496 on 2025-09-18
Marine Species Traits editorial board (2025). Marine Species Traits. Calyptospadix Clarke, 1882. Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=291496 on 2025-09-18
original descriptionClarke, S. F. 1882. New and interesting hydroids from Chesapeake Bay. Memoirs of the Boston Society of Natural History 3: 135-142, pls 7-9., available online athttps://www.biodiversitylibrary.org/page/7751215 page(s): 136 [details]
status sourceCalder, D. R. (2019). On a collection of hydroids (Cnidaria, Hydrozoa) from the southwest coast of Florida, USA. <em>Zootaxa.</em> 4689(1): 1-141., available online athttps://doi.org/10.11646/zootaxa.4689.1.1 page(s): 21 [details]