Parent document
Corallum morphology in Siderastrea (according to Wood. 1983)
Genus Form and size of colony Calice arrangement Walls/collines Septal and septocostal arrangements and features
Siderastrea Small massive or encrusting colonies. Rounded and regular; 2-4mm in diameter Walls shared, wide and often with midline. Numerous and in cycles; 35-45 in a calice 3mm in diameter; margins with small either simple or dentate spines; synapticulae present; septa often fuse; septa perforated.
Pseudosiderastrea Encrusting or massive colonies usually less than 10cm in diameter. Rounded irregular or angular; 2-4mm in diameter. Shared wall a narrow ridge, no midline; calice wide and shallow. Septa in cycles, usually about 30 in calice 3mm in diameter, up to 48 in larger calices; margins with small dentate spines; synapticulae present; septa often fuse in calices; septa rarely perforated.
Anomastrea Encrusting or massive, usually less than 10cm in diameter. Rounded, angular or irregular; 2-4mm in diameter. Shared wall a narrow ridge, no midline; fossa wide and fairly deep. About 30 septa in a calice 3mm in diameter; margins w/ small dentate spines; synapticular links rarely formed; fusion of septa in common; septa may be partially perforated.
Coscinaraea Massive, encrusting or partly foliaceous; seldom larger than 30cm in diameter. Rounded, irregular, elongate or in series; 2-7mm in diameter, or across valley. High or low walls or collines around the calices; walls may be wide, but w/o a midline. About 20-30 septa in a calice 3mm in diameter; margins with dentate spines; synapticulae present; occasional fusion of septa in calices; septa perforated.
Psammocora Great variation in growth form and colony size. Rounded, with indistinct outline; about 2mm in diameter. No walls, but collines often enclose single or several calices. Septa often branch and ramify, giving a petaloid appearance; seldom more than 10 reach the columella; margins with granular protuberances that are usually minutely branched; synapticular rings usually well develooped; septa do not fuse in calices.