Cretaceous sponges from the Campanian of Misburg and Höver
Procorallistes Schrammen 1901

Locality: Teutonia, Misburg
 Size: 110 mm across

Procorallistes polymorphus

Schrammen 1910

Procorallistes polymorphus commonly occurs as folded plates or ear-shaped forms, usually not exceeding 6 to 8 mm in thickness. The margins are rounded and the surfaces appear dense, without obvious pores.

Locality: Teutonia, Misburg
 Size: 80 mm across

Procorallistes polymorphus was originally classified by Schrammen (1910) as a member of the dicranocladine Family Corallistidae. De Laubenfels (1955) has placed Procorallistes into the Family Kaliapsidae under the Suborder Rhizomorina, and Reid (2004) has reallocated Procorallistes in Schrammen's (1924) Suborder Dicranocladina. - The taxonomic difficulties appear to arise from the fact that both, rhizoclone-like and dicranoclone-like spicules occur side by side (See bottom picture).

In the two specimens shown on the left, tuberculate and rhizoclone-like desmas dominate in the higher parts, while smooth, intertwined dicranoclone-like spicules form a dense structure near the base. Dermal dichotriaenes are abundant in the foot region of well preserved specimens.

Locality: Alemannia, Höver
Height: 80 mm

... Procorallistes polymorphus

Locality: Alemannia, Höver
Width: 70 mm

... Procorallistes polymorphus

Locality: Teutonia, Misburg
Height: 40 mm

The small sample of Procorallistes polymorphus shown in the picture is probably a juvenile form. It is only 2 mm thick and has the form of a spatula.

The spicules shown on the left are
(a) dicranoclones,
(b) megarhizoclonides and
(c) dichotriaenes.
After Schrammen (1910).