Cinachyrella porosa. Holotype NHMUK1886.8.29.632-633, Port Denison, Australia. A preserved material showing porocalices and internal structure B Labels of the type specimen C skeleton D electron micrograph showing oxea fragments and triaenes rhabds E oxea, end detail F protriaene G prodiaene H, I anatriaenes J sigmaspires. Scale bars: 1 cm (A, C); 500 μm (D); 50 μm (E); 40 μm (F–I); 5 μm (J).