Salani, Sula, Tito M.d.c. Lotufo, and Eduardo Hajdu. “Sigmaxinella Cearense sp. Nov. From Sandstone Reefs off Fortaleza (Ceara State, Brazil) (Desmacellidae, Mycalina, Poecilosclerida, Demospongiae)”. Zootaxa 1369, no. 1 (November 30, 2006): 43–53. Accessed April 5, 2025. https://mapress.com/zt/article/view/zootaxa.1369.1.4.