Madracis sp. B.

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CC species number = 21.6

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Photograph: Scale Bar is approx. 0.5 cm. Image of USNM 96428. (Moin Formation, Costa Rica. Plio-Pleistocene)

Morphologic Description:

Colony Form: plocoid to subcerioid
Colony Shape: branching
Colony Size: branches 7-14 mm thick
Budding Type: mostly extramural
Corallite Diameter: 1.0-1.4 mm
Calical Surface Shape: highly rounded, little or no polygonality or ellipticity
Coenosteum Width: 0.5-0.8 mm, calices ringed by a series of "pleats"
Lobes: none
Columella Structure: styliform
Wall Structure: septothecal


Plio-Pleistocene: Moin Formation, Costa Rica.