Genus Micropora Gray, 1848

Diagnosis. Colony encrusting. Zooids with lateral wall raised as mural rim. Frontal shield cryptocyst, granular, minutely perforate, with pair of opesiules near orifice. Oral spines present or absent. Ovicell present, partly immersed, closed by operculum. Avicularia interzooidal, distal to autozooid, or absent. Basal pore chambers present.

Type species. Flustra coriacea Esper in Johnston, 1847. For nomenclatural discussion, see Harmer (1926: 307).