Dactylotus micropelta
Schrammen 1910
Dactylotus micropelta is a small and very rare, branching sponge with flat twigs. One side (gastral ?) of the branches is furnished with cone-shaped and grooved knobs, approx. 5 mm in diameter, which bear groups of small postica. The opposite side is flat.
The skeleton consists of densely spaced tetracladine megascleres with tuberculated surfaces. One of the tetraclone arms is reduced to a small hemispherical knob.
Dactylotus auricularis
Schrammen 1924
Dactylotus auricularis is a small and inconspicuous sponge described by Schrammen (1924) from Misburg. The specimen shown here is from Höver. It is ear-shaped with a thick wall and irregular margin. On the gastral surface there are some pronounced furrows while the dermal side shows some sparse, millimeter-sized pores.
The skeleton consists of typical tuberculated tetraclones of which one arms is reduced to a small hemispherical knob.