Carter, H.J. (1883). Contributions to our Knowledge of the Spongida. <em>Annals and Magazine of Natural History.</em> (5) 12 (71): 308-329, pls XI-XIV., available online athttps://doi.org/10.1080/00222938309459636 page(s): 322-323 [details]
de Voogd, N.J.; Alvarez, B.; Boury-Esnault, N.; Cárdenas, P.; Díaz, M.-C.; Dohrmann, M.; Downey, R.; Goodwin, C.; Hajdu, E.; Hooper, J.N.A.; Kelly, M.; Klautau, M.; Lim, S.C.; Manconi, R.; Morrow, C.; Pinheiro, U.; Pisera, A.B.; Ríos, P.; Rützler, K.; Schönberg, C.; Turner, T.; Vacelet, J.; van Soest, R.W.M.; Xavier, J. (2025). World Porifera Database. Ptilocaulis rigidus Carter, 1883. Accessed at: https://www.marinespecies.org/porifera/porifera.php?p=taxdetails&id=193153 on 2026-07-21
original descriptionCarter, H.J. (1883). Contributions to our Knowledge of the Spongida. <em>Annals and Magazine of Natural History.</em> (5) 12 (71): 308-329, pls XI-XIV., available online athttps://doi.org/10.1080/00222938309459636 page(s): 322-323 [details]
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