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Gelidiella acerosa (Forssk.) Feldmann & Hamel

Reference
Rev.Gén.Bot. 46:533 (1934)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status
Current
Image

Scientific Description

Habit and structure. Thallus yellow to dark red, cartilaginous, with decumbent and erect terete axes to 2 mm diam. Erect axes simple or sparingly divided, to 35 mm tall, bearing pinnate determinate lateral branches, mostly from the distal region. Lateral branches, simple, 1–3 mm long. Medulla of densely packed longitudinal filaments, the cells thick-walled and 10–25 µm diam., grading into a smaller-celled cortex of pigmented cells. Outer cortical cells ellipsoidal and forming a palisade, in surface view circular to slightly elongate, 3–8 µm diam.

Reproduction. Tetrasporangia in nemathecia encircling the distal regions of determinate lateral branches, in the outer cortical layer, ellipsoidal, c. 15 µm long and 8–9 µm diam.

Distribution. Widely distributed in tropical seas.

[After J.M. Huisman, G.H. Boo & S.M. Boo in Algae of Australia: Marine Benthic Algae of North-western Australia, 2. Red Algae: 255 (2018)]

John Huisman & Olga Nazarova, 3 August 2021

Distribution

IBRA Regions
Carnarvon, Dampierland, Northern Kimberley, Pilbara.
IBRA Subregions
Cape Range, Mitchell, Pindanland, Roebourne.
IMCRA Regions
Central West Coast, Kimberley, Ningaloo, Pilbara (nearshore), Pilbara (offshore), Zuytdorp.
Local Government Areas (LGAs)
Ashburton, Broome, Carnarvon, Derby-West Kimberley, Exmouth, Karratha, Port Hedland, Shark Bay, Wyndham-East Kimberley.