In transverse sections, corallites commonly subovate or subelliptical, generally 1.
Corallites increase interstitial (between adult corallites in a rank) or lateral (at the end of a rank).
The crenulation of the corallite wall and the occurrence of septa in corallites of Heliolites interstinctus (Pl.
Topomorphic variation can be also the degree of crenulation of corallites in H.
For protection, they build hard, cup-shaped houses called corallites around their soft bodies.
The new polyp remains attached to its parent and builds its own stony corallite.
Chaetosalpinx has been interpreted as a tabulate parasite, considering its position between the corallites
, perforation of the host's skeleton and soft tissue, modification of its phenotype and possible inhibition of its growth (Zapalski 2007).
Other fossulate genera very closely related to Grewingkia are Bighornia Duncan, 1957 and Lobocorallium Nelson, 1963, which mainly differ in having lobated corallites.
Solitary streptelasmatid corals with ceratoid, trochoid or cylindrical corallite.
Polyps resemble little upside down jellyfish, For protection, they build stony cup-shaped houses called corallites
around their soft bodies.
Due to the simple morphology of internal characters like the polygonal corallites, pores predominantly located in corners, variable thickness of corallite wall and septal development, and by the similar size of corallites, this species is easily confused with P.
The minimum, maximum, and mean measurement values of corallites were calculated for each specimen and the range of means for a species is shown.