from Hooper and Wiedenmayer, 1994
from Hooper and Wiedenmayer, 1994
drawing F. Hiemstra
from Atlas of Sponge Morphology
photo M. Wapstra
from Wiedenmayer, 1977
from Atlas of Sponge Morphology
drawing F. Hiemstra
photo J.C. den Hartog
SEM photos R. van Soest
from Atlas of Sponge Morphology
from De Weerdt et al., 1991
from Atlas of Sponge Morphology
drawing R. van Soest
from Van Soest and Stentoft, 1988