Arinosaster patriciae gen. nov. et sp. nov. SEM figures of the skeleton structure A–F Sections of the spicular network with its main spicule fibers, supporting an open meshwork of irregularly distributed lateral spicule fibers composing circular cameras. A network of thin sponging fibers is seen to mingle with that of the spicule fibers F Detail showing helicoidal concentrations of spongin fibers at the sponge wall.

  Part of: Volkmer-Ribeiro C, Tavares-Frigo MC, Ribeiro AC, Bichuette ME (2021) Arinosaster patriciae (Porifera, Demospongiae): new genus and species and the second record of a cave freshwater sponge from Brazil. Neotropical Biology and Conservation 16(1): 45-57.