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Ceramium
 brevizonatum
var.
caraibicumH.E.
Petersen
&
BØrgesen

PhylumClassOrderFamilyGenusSpecies
RhodophytaFlorideophyceaeCeramialesCeramiaceaeCeramium
brevizonatum
var.
caraibicum
Habitat
Epiphytic on Bryothamnion seaforthii
Distribution
Atlantic Islands: Bermuda; North America: Florida, Mexico; Central America: Belize; Caribbean Islands: Barbados, Cuba, Dominican Republic, Hispaniola, Lesser Antilles; South America: Brazil, Venezuela; Africa: Tanzania; Indian Ocean: Seychelles.
Characteristics
Thallus about 3 cm high, filiform, erect, consisting of nodal and internodal segments, repeatedly pseudo-dichotomous branching pattern at 6-10 node intervals. Nodes 165-185 µm wide and 67.5-75 µm long. Internodal spaces tight, about 12.5-52.5 long (middle and apical portion). Apices forcipate to strongly rolled. Cortication at node consisting of periaxial cells that each cut off one pseudo-periaxial cell laterally and two filaments in an acropetal direction. The first and second cortical initial each bearing two cortical cells acropetally. Tetrasporangia globose, tetrahedrally divided, positioned adaxially and laterally at the distal to middle portions of thallus, one or two per node, partially covered by cortical cells, 50-57.5 µm wide.
Other Literature
Barros-Barreto M., McIvor, L., Maggs, C., and P. Gomez. 2006. Molecular systematics of Ceramium and Centroceras (Ceramiaceae, Rhodophyta) from Brazil. J. Phycol. 42: 905-921.

Guiry & Guiry. 2009. AlgaeBase. World Wide Web electronic publication. www.algaebase.com (August 18, 2009).

In Bocas Del Toro
Reported ByNSF-PASI Advanced Methods in Tropical Phycology Course 2009
LocalityWild
Cane
Cay
CommentsSize, branching and cortication pattern, and presence of pseudoperiaxial cells led to the determination of this Bocas taxon as Ceramium bravizonatum var. Caraibicum. This specimen conforms to the description of Barros-Barreto et al (2006), who showed that this species is commonly confused with Ceramium tenerrimum; however, the absence of triangular basipetal cells in older nodes and the presence of 1-2 rows of cortical cells at the nodes is a unique combination of characters that identify it as C. brevizonatum var. caraibicum. This is a new record for Bocas del Toro (Panama).
Compiled by
Gabriela Garcia Soto
Map
coordinates
Links
Reference
Field Guide to Common Marine Algae of the Bocas del Toro Area II: NSF-PASI Advanced Methods in Tropical Phycology Course 2009

Barros-Barreto M., McIvor, L., Maggs, C., and P. Gomez. 2006. Molecular systematics of Ceramium and Centroceras (Ceramiaceae, Rhodophyta) from Brazil. J. Phycol. 42: 905-921.
Comments
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