Robuta

https://scholarspace.manoa.hawaii.edu/items/6016c000-14da-4267-9a5d-c5b451dbcb21 The Reef Corals Lithactinia and Polyphyllia (Anthozoa, Scleractinia, Fungiidae): A Study of... The taxonomy of the Indo-Pacific reef corals Lithactinia and Polyphyllia is analyzed. They differ morphologically in that Lithactinia has one founder calice... the reef