Tedania, Gray, 1867

Calcinai, Barbara, Belfiore, Giuseppe, Pica, Daniela, Torsani, Fabrizio, Palma, Marco & Cerrano, Carlo, 2020, Porifera from Ponta do Ouro (Mozambique), European Journal of Taxonomy 698, pp. 1-56: 41-43

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Tedania   sp.

Fig. 23 View Fig

Material examined PONTA DO OURO • 1 fragment; 26°49′29.579″ S, 32°53′50.891″ E; Blacks ; 17 m deep; 11 Nov. 2015;

Torsani leg.; PdO5.



No available photos of the live sponge. The dried sample is a thin dirty-white lamina (20 ×30 × 5 mm), smooth and fragile.

SKELETON. In the fragment, it was impossible to distinguish ectosome from choanosome. The skeleton looks quite confused, with scattered spicules that sometimes become organized in loose tracts of tylotes.

SPICULES. Smooth styles ( Fig. 23A View Fig ), bent in the first third of the axis and with blunt tips, 255–(281.5, 7.5)– 285 µm × 3.75–(4.5, 0.4)– 5 µm; slightly curved tylotes ( Fig. 23B View Fig ), with slightly accentuated and

smooth tips, 245–(267.5, 25.1)– 335 µm × 2.5–(3, 0.8)– 5 µm; onychaetes ( Fig. 23C View Fig ) with acerate tips and usually with a swelling close to one tip, 77.5–(125)– 142.5 µm.


The specimen belongs to the genus Tedania Gray, 1867   based on the presence of two kinds of megascleres, one monoactinial and one diactinial, and onychaetes; the assignment to the subgenus is tricky: species belonging to the subgenus Tedania Gray, 1867   have, generally, spined tylotes, but, e.g., Tedania (Tedania) toxicalis De Laubenfels, 1930   has smooth tylotes (see also Desqueyroux & Van Soest 1996: 54); Tedaniopsis Dendy, 1924   has longer choanosomal megascleres (> 350 µm) and Trachytedania Ridley, 1881   has mucronate or oxeote tornotes as ectosomal megascleres. As a consequence and also considering the reduced size of the specimen, preventing any additional investigation, we prefer not to attribute any subgenus or species to this sponge and describe it as Tedania   sp.