Article: The Upper Palaeozoic tetracoral genera Lophophyllidium and Timorphyllum

The morphology of Lophophyllidium-like genera and their relationships are described and discussed. In early growth stages, Lophophyllidium has a zaphrentoid arrangement of septa with an elongate counter septum; the genus is characterized by a pseudocolumella that is extremely variable in morphology, both ontogenetically and between individuals; septal microstructure is trabecular. The synonymy of Laphophyllidium includes Sinophyllum Grabau. Malonophyllum Okulitch and Albritton, Stereostylus Jeffords, Agarikophyllum Fomitshev. and Khmerophyllum Fontaine; each was originally distinguished on the basis of pseudocolumella morphology.Tanoraphyllum differs from Lophophyllidium in ontogeny and microstructure; macrostructural similarities reflect homeomorphy.