Dumontia contorta: Difference between revisions
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{{short description|Species of algae}} |
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{{speciesbox |
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| image = Dumontia contorta Crouan.jpg |
| image = Dumontia contorta Crouan.jpg |
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| image_caption = |
| image_caption = |
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| genus = Dumontia |
| genus = Dumontia (alga) |
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| species = contorta |
| species = contorta |
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| authority = ([[Samuel Gottlieb Gmelin|S.G. Gmelin]]) [[Franz Josef Ruprecht|Ruprecht]]<ref name="Irvine 83">Irvine, L.M. 1983. ''Seaweeds of the British Isles'' Volume 1 Rhodophyta. Part 2A. British Museum (Natural History) {{ISBN|0 565 00871 4}}</ref> |
| authority = ([[Samuel Gottlieb Gmelin|S.G. Gmelin]]) [[Franz Josef Ruprecht|Ruprecht]]<ref name="Irvine 83">Irvine, L.M. 1983. ''Seaweeds of the British Isles'' Volume 1 Rhodophyta. Part 2A. British Museum (Natural History) {{ISBN|0 565 00871 4}}</ref> |
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==Description== |
==Description== |
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The [[thallus]] grows from a discoid [[holdfast]] to a length of about {{convert|23|cm}}. The [[frond]]s branch irregularly and sparingly.<ref>Jones, W.E. 1964. A key to the genera of the British seaweeds. ''Field Studies'' '''1''' no.4:1 - 32</ref> The branches are hollow, soft and twisted, dark reddish brown in colour which bleach towards the tips, they clearly taper at their junction.<ref name="Irvine 83"/> |
The [[thallus]] grows from a discoid [[holdfast (biology)|holdfast]] to a length of about {{convert|23|cm}}. The [[frond]]s branch irregularly and sparingly.<ref>Jones, W.E. 1964. A key to the genera of the British seaweeds. ''Field Studies'' '''1''' no.4:1 - 32</ref> The branches are hollow, soft and twisted, dark reddish brown in colour which bleach towards the tips, they clearly taper at their junction.<ref name="Irvine 83"/> |
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==Reproduction== |
==Reproduction== |
Latest revision as of 17:40, 7 May 2021
Dumontia contorta | |
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Scientific classification | |
(unranked): | Archaeplastida |
Division: | Rhodophyta |
Class: | Florideophyceae |
Order: | Gigartinales |
Family: | Dumontiaceae |
Genus: | Dumontia |
Species: | D. contorta
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Binomial name | |
Dumontia contorta |
Dumontia contorta is a relatively small epiphytic algae of the sea-shore.
Description[edit]
The thallus grows from a discoid holdfast to a length of about 23 centimetres (9.1 in). The fronds branch irregularly and sparingly.[2] The branches are hollow, soft and twisted, dark reddish brown in colour which bleach towards the tips, they clearly taper at their junction.[1]
Reproduction[edit]
The plants are dioecious (sexes separate) with microscopic spermatangia, carposporangia, and tetrasporangia developing in the surface layer, cruciate.[1][3]
Habitat[edit]
Generally epilithic in rock pools of the littoral zone.[1]
Distribution[edit]
Common around the British Isles. Europe from Russia to Portugal and Canada to United States. In the NW Pacific and Alaska.[1][4]
References[edit]
- ^ a b c d e Irvine, L.M. 1983. Seaweeds of the British Isles Volume 1 Rhodophyta. Part 2A. British Museum (Natural History) ISBN 0 565 00871 4
- ^ Jones, W.E. 1964. A key to the genera of the British seaweeds. Field Studies 1 no.4:1 - 32
- ^ Bunker,StP,P, Brodie, J.A., Maggs, C.A. and Bunker, A.R. 2017 Seaweeds of Britain and Ireland. Second Edition, Wild Nature Press, Plymouth, UK.ISBN 978-0-9955673-3-7
- ^ Morton, O. 2003. The marine macroalgae of County Donegal, Ireland. Bulletin of the Irish Biogeographical Society No. 27 pp.3 - 164