Adelocoenia d’Orbigny, 1849

Genus Adelocoenia d’Orbigny, 1849

Type species. Astrea castellum Michelin, 1844 , Upper Jurassic of France (neotype designation Lathuilière, et al., 2020).

Diagnosis. Colonial, massive to subhemispherical, small knobby, plocoid corallum. Septa compact, free, bicuneiform, costate, non-confluent, often straight, unequal in length, arranged mainly radially; bilateral arrangement might occur as a result of elongation of both calices and calicular fossae. Septal ornamentation very weak or smooth when covered by thickening deposits. Secondary trabecular axes irregularly emerge from the mid-septal plan toward the septal faces. Pali and synapticulae absent. Endotheca made of tabulae or tabuloid dissepiments, rarely vesicular. Peritheca made of vesicular dissepiments. Columella absent but a clear central subcircular fossa present (in neotype of type species, in one out of 32 corallites, however, structures are present which may or may not correspond to a columella). Intertrabecular distance up to around 100 µm. Wall parathecal, developed in continuity with thickening deposits of septa .