Madracis sp. A.

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CC species number = 21.5

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Photograph: Scale Bar is approx. 0.5 cm. Image of NMB a86-ta. (Gurabo Formation, Dominican Republic. Late Miocene to Early Pliocene).

Morphologic Description:

Colony Form: plocoid to subcerioid
Colony Shape: branching and globular, ocassionally thick encrustations
Colony Size: thickly branched >15-20 mm
Budding Type: mostly extramural
Corallite Diameter: 1.1-1.5 mm
Corallite Surface Shape: polygonal
Coenosteum Width: 0.3-0.45 mm
Septa Per Corallite: 10 primary septa, secondary septa are reduced
Lobes: none
Columella Structure: styliform
Columella Development: broad
Wall Structure: septothecal


Late Miocene to Early Pliocene: Gurabo Formation, Dominican Republic.