Pycnodesma globosa
Schrammen 1910
Pycnodesma globosa is moderarely common. It is one of the smallest sponges, generally less than 20 mm. Macroscopically it differs from Plinthosella squamosa by its smaller size and by the existence of a small root.
The spiculation of Pycnodesma globosa is also similar to that of Plinthosella squamosa, but the spicules are distictly smaller. Distinction is feasible by direct comparison.