Calcareous spicules closely similar to those previously reported in several species of Heliolites, have been found in another heliolitid species, Squameolites junggarensis Lin et Wang, from a clayey limestone of the lower part of Kuimov Formation, of Homerian (Wenlock) age, in the western part of the Gorny Altai, Siberia. The sclerites are associated with microspheres, identified also in colonies of an unidentified species of Propora. It is suggested that the microspheres associated with the tabulate corals were their photoautotrophic symbionts.
