Erythrodermis traillii (Batters) Guiry & Garbary
Also known as Phyllophora traillii Holmes ex Batters and
Erythrodermis allenii
Description: Cartilaginous, light reddish-brown fronds,
to 30 mm long, with short cylindrical stipes from small discoid
holdfasts. Blades flat, simple with parallel sides or
dichotomously divided, sometimes with the appearance of an
evanescent midrib (see the third plant from the left above).
Reproductive structures (male and female) borne in small
fringing leaflets. Tetrasporangia on a small crust.
Habitat: On shady rocks and pool margins, often in caves
and associated with sponges, lower intertidal and shallow
subtidal, widely distributed.
Similar species:
Rhodymenia delicatula.
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