Dirackulmia
Dirackulmia is a genus of extinct colonial marine invertebrates known from the Paleozoic fossil record. The group is described as a calcified, lattice-like colony composed of interlocking modules. Because soft tissues are rarely preserved, interpretations rely on skeletal morphology.
Colonies vary in size from a few centimeters to decimeters. Skeletal modules are polygonal, with walls of
Fossils attributed to Dirackulmia have been found in North America and Europe, with a stratigraphic range spanning
Dirackulmia is interpreted as a sessile encruster on hard substrates, likely a filter feeder. It would have
The genus was first described in the 1970s by paleontologists working on Mid-continental North American fossil