multipunctata, which is distinctly plocoid and has less variable, smaller corallites
(up to 9 mm in diameter) (Hodgson 1985); and M.
Septa number showed high variability (34-44 septa per corallite
) and deep calice, and all samples alternated septa with corallites
In transverse sections, corallites
commonly subovate or subelliptical, generally 1.29-2.16 mm long and 1.02-1.85 mm wide.
Auloporida formed arbustive or fruticose colonies with proximal corallites
commonly prostrate or adherent to other biogenic or inorganic remains; may have erect corallites
(fasciculate) or branched (dendroid) and more rarely cerioid.
are plocoid, compact, variable in size and deep.
daintreei daintreei in Powell (1979) has slightly larger corallite
diameters (1.08-1.35 mm) and a more variable corallite
shape than the first subspecies, which has smaller (0.65-0.83 mm across) and slightly crenulated corallites
The new polyp remains attached to its parent and builds its own stony corallite
. Through this process, huge colonies can evolve.
Scleractinian corals typically display a striking degree of morphological variation in colony shape and corallite
structure along environmental gradients (Foster 1980, Brown et al.
Other fossulate genera very closely related to Grewingkia are Bighornia Duncan, 1957 and Lobocorallium Nelson, 1963, which mainly differ in having lobated corallites
. Additionally, Bighornia has a concave cardinal side.
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 resultant corallites
were rinsed well in running water and then several times in d[H.sub.2]O Any soft tissue remaining upon the exsert septa was removed by agitation and pipetting of d[H.sub.2]O onto the sample.