Size / Weight / Age
Max length : 1.2 cm TL male/unsexed; (Ref. 82093)
Climate / Range
Indian Ocean: In South Africa and Maldives; Pacific Ocean: In China and Japan, east to Hawaiian Islands including Micronesia and Fiji (Re. 80701).
Countries | FAO areas | Ecosystems | Occurrences | Introductions
Thalli consist of unbranched, lanceolate blades (7-12 mm high and 0.8-2.3 mm broad), attached by means of a small discoid holdfast. Growth takes place from a single apical cell, with a typical type-one apical organisation (i.e. all second order row cells produce third order rows). The midrib remains uncorticated throughout. Tetrasporangial sori form discrete, paired ovate sori close to the midrib, 900-1700 Î¼m long and 400-600 Î¼m wide. Tetrasporangial formation involves the lateral pericentral cells but not the transverse ones. Tetrasporangia, 62-80 Î¼m in diameter, are cut off from second- and third order cell rows as well as from cortical cells, resulting in sporangia that lie in more than one plane of the blade. Spermatangial sori form discrete, somewhat oblique patches scattered over the wings. Female plants produce a single cystocarp on the midrib in the distal region of the blades (Ref. 82093).
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Estimation of some characteristics with mathematical models