Tabulate corals consisting of bundles of small (< 1 cm) anastomosing (splitting and recombining) branches
Vine-like splitting and merging patterns with oval- and lens-shaped spaces between thin branches
Alveolites (some species, can also form mounds and branching shapes)
Cladopora (some species have more regular branching)
Tabulate corals consisting of erect bundles of thin (millimeters) tubes (corallites) or clusters of more isolated tiny corallites.
Chain corals; narrow tubes arranged in twisting rows with looping, circular, and polygonal spaces between tubes
Catenipora Cystihalysites Halysites Quepora
Clusters of small, narrow tubes in pipe organ and pan-flute shapes
Syringopora
Compare with Acinophyllum, a rugose coral with this shape, but thicker corallites
Small vine-like shapes, buds, barnacle-like shapes and tiny branching tubes adhering on other fossils
Aulocystis Chonostegites Romingeria
Aulopora Cladochonus
Compare with bryozoans, which also have tiny tube-like shapes adhering to other fossils