Salani, Sula, Tito M.d.c. Lotufo, and Eduardo Hajdu. 2006. “Sigmaxinella Cearense sp. Nov. From Sandstone Reefs off Fortaleza (Ceara State, Brazil) (Desmacellidae, Mycalina, Poecilosclerida, Demospongiae)”. Zootaxa 1369 (1). Auckland, New Zealand:43–53. https://doi.org/10.11646/zootaxa.1369.1.4.