Undaria pusilla (Verrill, 1901).

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Photograph: Scale bar is approx 0.5 cm. Image is of SUI 63897 (San Blas Islands, Panama. Recent).

Synonyms: None.

Morphologic Description:

Colony Form: meandroid
Colony Shape: encrusting masses or thin plates
Colline Characteristics: low
Series Length: long
Budding Type: intramural
Coralllite Diameter: 1.4-1.9 mm
Calical Surface Shape: closed, often star-like
Septa Per Corallite: 15-21
Lobes: none
Columella Structure: trabecular and discontinuous
Columella Development: strong
Wall Structure: synapticulothecal

Holotype: YPM 1489 (Locality: Colon, Panama. Recent)

Distribution:

Early Pliocene: Río Banano Formation, Costa Rica.
Plio-Pleistocene: Moin Formation, Costa Rica.
Recent: Caribbean and Brazil.