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Gayliella flaccida(Kützing) T.O. Cho et McIvor

Epiphyte on seagrass Thalassia testudinum. Common on this and other seagrass and macroalgae species in shallow waters.
New Caledonia, Ireland, Adriatic, Balearic Islands, Black Sea, Britain, France, Greece, Italy, Malta, Portugal, Sardinia, Scandinavia, Slovenia, Spain, Turkey, Atlantic Islands, Florida, western Caribbean, Chile, Africa, Indian Ocean Islands, Southwest Asia.
Formerly known as Ceramium flaccidum, the species is characterized by uniseriate filaments in delicate tufts to 115 μm tall, with incurved tips. Branching at every 7-9 nodes of main axes. Axial cells cylindrical or spherical. Three cortical initials produced from each periaxial cell at nodes. The first two cortical initials (c1 and c2) are cut off obliquely from the periaxial cells and grow acropetally, transversely elongated cortical initial (c3) is cut off horizontally from the posterior end of the periaxial cell and grows basipetally. Tetrasporangia spherical and tetrahedrally divided. A single tetrasporangium develops at each node in a straight series. Gayliella is distinguished from Ceramium by its alternate branching pattern, pericentral and cortical cell arrangement, and unicellular rhizoids produced from periaxial cells.
In Bocas Del Toro
LocalityWild Cane Cay
Compiled by
Margarita Rosa Albis Salas
Tropical Field Phycology Field Book, STRI, Bocas de Toro, 2008.
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