Elachista scutulata (Smith) Areschoug
Description: Thallus a loose, globose cushion
to 30 mm wide from which a tuft of free assimilatory filaments
arises. Assimilatory filaments unbranched, usually more than 100
µm wide and 5-10 mm long, coalescing basally together with
paraphysis-like filaments into a loose cushion; cortex and
medulla present in the cushion. Many discoid chloroplasts in
each cell. Unilocular sporangia sunken in the cushion;
plurilocular sporangia unknown.
Habitat: mid to lower intertidal; epiphytic on
Himanthalia elongata. Widely distributed in Ireland and Britain;
western and southern coasts where the host occurs.
Species list
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