Jania rubens (Linnaeus) Lamouroux
Also known as Corallina rubens and probably
Jania corniculata.
Description: Slender, rose-pink, articulated,
calcified fronds, in rounded bunches to 50 mm high. Repeatedly
dichotomously branched, luxuriant specimens secondarily pinnate.
Segments cylindrical, to 100 µm diam., those bearing
branches somewhat compressed, to 200 µm diam. Fixed by
small conical disc, but spreading vegetatively by developing
attachment discs from branches in contact with solid
substrata.
Habitat: Epiphytic, only found growing
epiphytically on older plants of the brown algae
Cladostephus spongiosus
and at the base of old, long-established
Cystoseiraspecies in the lower intertidal, southern and western shores,
often abundant.
Similar species:
Corallina elongata, which is pinnately branched in contrast with the dichotomous
branching of Jania rubens.
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