The new species belongs to the Halysites species group whose tubules do not occur between every pair of adjacent corallites
, all of which are transitional between Catenipora and Halysites.
Topomorphic variation includes the variation in corallite size, shape, and spacing within the corallum (Scrutton 1989).
The variation in quantitative characters of heliolitids, such as tabularium diameter, corallite spacing, and thickness of the corallite wall, is evident within coralla, but the degree of variation is higher between coralla (Figs 5, 6).
Heliolites interstinctus differs from other heliolitids by the largest mean corallite size.
daintreei daintreei in Powell (1979) has slightly larger corallite diameters (1.
For protection, they build hard, cup-shaped houses called corallites
around their soft bodies.
Specimen R45321 is fairly small, has a rather complete corallite of straight ceratoid shape with a long fixing scar on one side of the apex, and a high calicular boss in the calice.
Solitary streptelasmatid corals with a trochoid, ceratoid or cylindrical corallite.
Corallite medium-sized or fairly high (at least 80 mm high, calice diameter at least 22 mm, and the largest number of major septa 49), and of almost straight or irregularly curved (scolecoid) cylindrical type.
The average transverse axis method (Sutton 1966) is applied here to measure corallite dimensions.
Corallite growth in spherical coralla was circumrotatory, and upward and outward or irregular (mixed growth orientation) in bulbous coralla.
The corallite wall is usually straight or slightly wavy in transverse section (Fig.