Bibliographic Detail
Kato, A. & Masuda, M., 2003
Reference:
Kato, A. & Masuda, M. (2003). A new crustose red alga Peyssonnelia rumoiana (Rhodophyta, Gigartinales) from Japan. Phycological Research 51(1): 21-28.
Publication Date:
March 2003
Abstract:
The marine red alga Peyssonnelia rumoiana Kato et Masuda, sp. nov. (Peyssonneliaceae, Gigartinales) is described from warm- and cold-temperate regions in Japan. It is principally characterized by having hypothallial filaments comprising a polyflabelate layer, proximal perithallial cells arising from the whole upper surface of each hypothallial cell (Peyssonnelia rubra-type anatomy) and closely packed in a firm matrix, the production of two filaments from the proximal perithallial cell, unicellular rhizoids, appressed crust margins and hypobasal calcification. The alga is distinguished from related species by: (i) its conspicuously elevated cystocarpic (100-150 µm high) and tetrasporangial (80-110 µm high) nemathecia; (ii) tetrasporangia with or without a unicellular pedicel; and (iii) large (25-45 µm in diameter by 70-115 µm in length) tetrasporangia and (iv) the production of double chains of spermatangia (Peyssonnelia harveyana-type spermatangial development).
