Substrate: Tridacna crocea; Sampled and identified by C. Schönberg. All measurements are of mature, fully formed endosomal oxeas to allow statistical comparison with other samples. Measurements conducted by C. Schönberg on preparation of acid-cleaned spicules made by C. Schönberg. Data are sorted vertically by spicule width.; Schönberg, Christine H. L.; Grass, Stephanie, Heiermann, Anke T. (2006) Cliona minuscula sp. nov. (Hadromerida : Clionaidae) and other bioeroding sponges that only contain tylostyles. Zootaxa 1312: 1-24 (S. minutum in QM G322595: p. 5, Fig. 2 and 4, Tab. 2).