Lepidophyllia (Heterastraea) microcalix sp. nov. A–B longitudinal sections of the colony SB–329. Note the two opposite septa cut longitudinally in the centre of the corallite and the ornamentation of their inner margins (A). C longitudinal section of the colony SB–228. D longitudinal section of the holotype SB–220. E–F transverse sections of the colony SB–216, note the septal intracalicular budding.