Overview

Comprehensive Description

Description

 Aglaothamnion diaphanum is a pale pink coloured red seaweed, 2-10 mm high, with a delicate texture. The fronds are branched in one plane, with a single principal axis and linear to fan-shaped (flabellate) outline. This species shows little variation except in the degree of development of branching. In some thalli, occasional branching become equal in length to the main axis, producing a fan-shape (flabellate) rather than linear frond outline.Could be confused with very small non-reproductive thalli of some growth forms of Compsothamnion gracillimum but Compsothamnion species are multinucleate in contrast to Aglaothamnion, which is uninucleate. Thalli reproductive from a small size and are usually easily recognisable by the reproductive spores (bisporangia). Identification of single specimens can be difficult, so if possible a number of thalli should be collected.
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Source: Marine Life Information Network

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Physical Description

Type Information

Type locality: St JohnÕs Point, Co. Donegal, Ireland
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Source: AlgaeBase

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Isotype for Aglaothamnion diaphanum L'Hardy-Halos & Maggs
Catalog Number: US 198003
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Specimen/Lot
Collector(s): C. Maggs
Year Collected: 1989
Locality: St. Johns Point, County Donegal, Ulster, Ireland, Europe
  • Isotype: L'Hardy-Halos, M. & Maggs, C. A. 1991. Phycologia. 30 (5): 468.
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© Smithsonian Institution, National Museum of Natural History, Department of Botany

Source: National Museum of Natural History Collections

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Isotype for Aglaothamnion diaphanum L'Hardy-Halos & Maggs
Catalog Number: US 198003
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): C. Maggs
Year Collected: 1989
Locality: St. Johns Point, County Donegal, Ulster, Ireland, Europe
  • Isotype: L'Hardy-Halos, M. & Maggs, C. A. 1991. Phycologia. 30 (5): 468.
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© Smithsonian Institution, National Museum of Natural History, Department of Botany

Source: National Museum of Natural History Collections

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Ecology

Habitat

 Usually grows on large algae as an epiphyte but also on bedrock, and rarely found growing on pebbles. This subtidal species grows from 7-25 m depth and can tolerate moderately wave exposed sites.
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©  The Marine Biological Association of the United Kingdom

Source: Marine Life Information Network

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