Sampled and identified by B. Calcinai. All measurements are of mature, fully formed oxeas (presumably from the endosome) to allow statistical comparison with other samples. Measurements conducted by C. Schönberg on tissue preparation (partly fistular tisue) containing isolated spicules, slide made by B. Calcinai. Data are sorted vertically by spicule width.; Calcinai, Barbara; Cerrano, Carlo; Sarà, Michele; Bavestrello, Giorgio (2000) Boring sponges (Porifera, Demospongiae) from the Indian Ocean. Italian Journal of Zoology 67: 203-219.