Premium
A new crustose red alga Peyssonnelia rumoiana (Rhodophyta, Gigartinales) from Japan
Author(s) -
Kato Aki,
Masuda Michio
Publication year - 2003
Publication title -
phycological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.438
H-Index - 44
eISSN - 1440-1835
pISSN - 1322-0829
DOI - 10.1046/j.1440-1835.2003.00289.x
Subject(s) - gigartinales , biology , crustose , botany , achene , algae , red algae , ecology
SUMMARY 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 hypo‐thallial 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).