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Herzog, S.; Amon, D.J.; Smith, C.R.; Janussen, D. (2018). Two new species of Sympagella (Porifera: Hexactinellida: Rossellidae) collected from the Clarion-Clipperton Zone, East Pacific. in: Deep Sea and Cave Sponges, Klautau, M., Pérez, T., Cardenas, P. & de Voogd, N. (eds). Zootaxa. 4466 (1): 152-163.