PORT PHILLIP BAY


Red Seaweed 

Jania rosea

View scientific description and taxonomy

Scientific Details

Can be confused with Corallina officinalis although J. rosea has less middle tiers on each segment and a variable habit (tufted through to non-tufted).

Main information sources:
Womersley, H.B.S., (1984-2003). The Marine Benthic Flora of Southern Australia. Part 1-3d. Govt. Printer, South Australia.
Baldock, R.N. 2010. Algae Revealed. South Australian State Herbarium. Website.
AlgaeBase. Website.

Taxonomy

Phylum:
Rhodophyta
Subphylum:
Eurhodophytina
Class:
Florideophyceae
Subclass:
Corallinophycidae
Order:
Corallinales
Family:
Corallinaceae
Subfamily:
Corallinoideae
Genus:
Jania
Species:
rosea

General Description

Densely branched with numerous tufted fronds (adventitious branches or "tufts" arise without regular pattern). Fronds have branches arranged on each side of one axis (pinnate) with axes arranged in an even to alternate pattern. Branches have regular flexible joints (intergeniculum). Arises from crustose holdfast (calcium-carbonate encrusted). Medium-light grey-red. Up to 10 cm long (thallus).

Biology

Often grows on seagrasses and other algae, commonly on the seagrass Amphibolis antartica. It was formerly known as Haliptilon roseum.

Habitat

Tidal pools and subtidal rock reefs, also on large seagrasses and algae, exposed coasts, to depth of 10 m.

Reefs

Seagrass meadows

Coastal shores

Distribution guide

Worldwide.

Species Group

Seaweeds and seagrasses Red algae

Depth

Shore (0-1 m)
Shallow (1-30 m)

Water Column

On or near sea floor

Max Size

10 cm

Diet

Photosynthetic - sunlight

Commercial Species

No

Global Dispersal

Recorded in Australia

Identify

Conservation Status

  • DSE Advisory List : Not listed
  • EPBC Act 1999 : Not listed
  • IUCN Red List : Not listed

Author

article author Pocklington, Jacqui

Jacqui Pocklington is a Research Associate with expertise in algal taxonomy.

citation

Cite this page as:
Pocklington, Jacqui, 2011, Red Seaweed, Jania rosea, in Taxonomic Toolkit for marine life of Port Phillip Bay, Museum Victoria, accessed 30 May 2017, http://portphillipmarinelife.net.au:8098/species/11187

Text: creative commons cc by licence