Litosiphon pusillus (Carmichael) Harvey
Description: Thallus filiform, olive when
young, brownish when older, in tufts to 120 mm long.
Filaments unbranched, 0.25-1mm diameter. Thallus mainly
parenchymatous, uniseriate near the base. Parenchymatous parts
differentiaed into medulla and epidermis; older parts of the
frond become hollow. Haris abundant. Many discoid
chloroplasts per cell. Unilocular sporangia developed from the
the outer epidermal cells; plurilocular sporangia multiseriate,
also developed from the outer epidermal cells.
Habitat: Lower intertidal, epiphytic on the
brown alga Chorda filum.
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