Astogenetic variation is expressed at different stages of corallum development.
Topomorphic variation includes the variation in corallite size, shape, and spacing within the corallum (Scrutton 1989).
The variable occurrence of septa within the corallum in that species excludes the possibility of assigning specimens without septa to Heliolites decipiens M'Coy (Lee et al.
The shape of the corallite wall varies from smooth to wavy, whereas variation is more distinct between specimens than within the corallum (Pl.
Unlike other tabulates, it also has a corallum of columnar shape (Table 1).
Corallite sizes are slightly variable inside the corallum (Pl.
Some coralla grew in varied directions, making their corallum shapes irregular.
The narrow range of only spherical and bulbous corallum shapes in Paleofavosites cf.
Corallite sizes vary inside a corallum, but there is no connection of mean corallite size with the different parts (sides and axial part) of the corallum (Fig.
collatatus are more variable between coralla than within a corallum (Tables 2, 5).
As seen in one corallum, the proportion of young corallites remained stable during the upward growth of corallites, but changed with irregular or outward growth.
Corallum parameters Height to the widest Irregular Specimen Locality Width, Height, mid- Colony growth number cm cm point, shape present cm 481-77 A 3 3 Spherical 481-103 A 4.