PORT PHILLIP BAY


Brown Seaweed 

Cystophora retorta

View scientific description and taxonomy

Scientific Details

Similar to Cystophora siliquosa but has a flattened (compressed) stem rather than a quadrangular stem.

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:
Ochrophyta
Subphylum:
Phaeista
Superclass:
Fucistia
Class:
Phaeophyceae
Order:
Fucales
Family:
Sargassaceae
Genus:
Cystophora
Species:
retorta

General Description

Long relatively straight central stalk (stipe) with strongly zig-zagged flattened branches arising in an alternating pattern on one plane which have sub-branches. Branchlets (ramuli) are arranged on one plane in an alternate arrangement becoming evenly divided (sub-dichotomous). Holdfast at base is a simple and disc-conical shaped. Medium brown. Up to 80 cm long (thallus).

Biology

This species can often be seen close to shore, in deep rock pools or during very low tides at the water edge.

Habitat

Subtidal rocky reefs and large tidal pools, common in shallow waters with moderate wave action, to depth of 21 m.

Reefs

Coastal shores

Distribution guide

Australia.

Species Group

Seaweeds and seagrasses Brown algae

Depth

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

Water Column

On or near sea floor

Max Size

80 cm

Diet

Photosynthetic - sunlight

Commercial Species

No

Global Dispersal

Native to 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, Brown Seaweed, Cystophora retorta, in Taxonomic Toolkit for marine life of Port Phillip Bay, Museum Victoria, accessed 25 Jul 2017, http://portphillipmarinelife.net.au:8098/species/11181

Text: creative commons cc by licence