Porolithon improcerum (porolithoideae, corallinaceae) and mesophyllum macroblastum (melobesioideae, hapalidiaceae): New records of crustose coralline red algae for the Southwest Atlantic Ocean
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Date
2014
Journal Title
Journal ISSN
Volume Title
Publisher
Magnolia Press
Abstract
Here we describe in detail two crustose coralline red algal (CCA) species newly reported for the southern Atlantic:
Porolithon improcerum and Mesophyllum macroblastum. Porolithon improcerum was recorded on the remote oceanic
island of Martim Vaz (ca. 1,200 km off the Brazilian Coast) and M. macroblastum on the Cagarras Archipelago (ca. 5 km
off the coast of Rio de Janeiro city). Within the genus Porolithon, P. improcerum is characterized by thin vegetative
thallus composed mostly of two cell layers and thalli forming several applanate branches overgrowing one another.
Within the genus Mesophyllum, M. macroblastum is characterized by bearing volcano-like multiporate tetrasporangial
conceptacles with a raised rim and sunken central pore plate in addition to pore canals of conceptacles being lined by
cells that are similar in size and shape to other roof cells. While, P. improcerum has previously been reported for the
northern Atlantic Ocean, this study represents the first report of M. macroblastum for the Atlantic Ocean.
Description
Keywords
Biodiversity, Conservation, Brazil, Ecosystem, Seaweed
Citation
Bahia, R. D. et al. (2014). Porolithon improcerum (porolithoideae, corallinaceae) and mesophyllum macroblastum (melobesioideae, hapalidiaceae): New records of crustose coralline red algae for the Southwest Atlantic Ocean. Phytotaxa, 190 (1) ,38-44. https://doi.org/10.11646/phytotaxa.190.1.5