The pseudodichotomous Dasya sylviae sp. nov. (Delesseriaceae, Ceramiales) from 60–90 m mesophotic reefs off Bermuda

The pseudodichotomous Dasya sylviae sp. nov. (Delesseriaceae, Ceramiales) from 60–90 m mesophotic reefs off Bermuda

The red alga Dasya sylviae C.W.Schneid., M.M.Cassidy & G.W.Saunders sp. nov. is described from mesophotic depths of 60–90 m off Bermuda. Genetic sequences (COI-5P, rbcL) and morphological characteristics show that this species is distinct from other known pseudodichotomous species of Dasya. Of...

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Main Authors: Craig W. Schneider, Margaret M. Cassidy, Gary W. Saunders
Format: Article
Language:English
Published: Consortium of European Natural History Museums 2021-05-01
Series:European Journal of Taxonomy
Subjects:
western Atlantic
Dasya
mesophotic zone
Rhodophyta
Online Access:https://europeanjournaloftaxonomy.eu/index.php/ejt/article/view/1377
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spelling doaj-6f8b2c32324148eeaa73e9589d4aa0792021-07-30T10:39:18ZengConsortium of European Natural History MuseumsEuropean Journal of Taxonomy2118-97732021-05-01751110.5852/ejt.2021.751.1377The pseudodichotomous Dasya sylviae sp. nov. (Delesseriaceae, Ceramiales) from 60–90 m mesophotic reefs off BermudaCraig W. Schneider0Margaret M. Cassidy1Gary W. Saunders2Department of Biology, Trinity College, Hartford, CT 06106, USADepartment of Biology, Trinity College, Hartford, CT 06106, USACentre for Environmental & Molecular Algal Research, Department of Biology, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada The red alga Dasya sylviae C.W.Schneid., M.M.Cassidy & G.W.Saunders sp. nov. is described from mesophotic depths of 60–90 m off Bermuda. Genetic sequences (COI-5P, rbcL) and morphological characteristics show that this species is distinct from other known pseudodichotomous species of Dasya. Of ten current species in the genus reported from Bermuda, only three, D. collinsiana M.Howe, D. cryptica C.W.Schneid., Quach & C.E.Lane and D. punicea (Zanardini) Menegh., share the overall pattern of pseudodichotomous branching in their axes; however, key morphological features easily distinguish them from D. sylviae sp. nov. The species most similar in habit to D. sylviae sp. nov. is D. crouaniana J.Agardh (type locality West Indies), but it bears shorter pseudolateral branches, and broader and longer tetrasporangial stichidia than the new species. Unique among the species of Dasya, D. sylviae sp. nov. lacks post-sporangial cover cells in tetrasporangial stichidia. https://europeanjournaloftaxonomy.eu/index.php/ejt/article/view/1377western AtlanticDasyamesophotic zoneRhodophyta
collection DOAJ
language English
format Article
sources DOAJ
author Craig W. Schneider
Margaret M. Cassidy
Gary W. Saunders
spellingShingle Craig W. Schneider
Margaret M. Cassidy
Gary W. Saunders
The pseudodichotomous Dasya sylviae sp. nov. (Delesseriaceae, Ceramiales) from 60–90 m mesophotic reefs off Bermuda
European Journal of Taxonomy
western Atlantic
Dasya
mesophotic zone
Rhodophyta
author_facet Craig W. Schneider
Margaret M. Cassidy
Gary W. Saunders
author_sort Craig W. Schneider
title The pseudodichotomous Dasya sylviae sp. nov. (Delesseriaceae, Ceramiales) from 60–90 m mesophotic reefs off Bermuda
title_short The pseudodichotomous Dasya sylviae sp. nov. (Delesseriaceae, Ceramiales) from 60–90 m mesophotic reefs off Bermuda
title_full The pseudodichotomous Dasya sylviae sp. nov. (Delesseriaceae, Ceramiales) from 60–90 m mesophotic reefs off Bermuda
title_fullStr The pseudodichotomous Dasya sylviae sp. nov. (Delesseriaceae, Ceramiales) from 60–90 m mesophotic reefs off Bermuda
title_full_unstemmed The pseudodichotomous Dasya sylviae sp. nov. (Delesseriaceae, Ceramiales) from 60–90 m mesophotic reefs off Bermuda
title_sort pseudodichotomous dasya sylviae sp. nov. (delesseriaceae, ceramiales) from 60–90 m mesophotic reefs off bermuda
publisher Consortium of European Natural History Museums
series European Journal of Taxonomy
issn 2118-9773
publishDate 2021-05-01
description The red alga Dasya sylviae C.W.Schneid., M.M.Cassidy & G.W.Saunders sp. nov. is described from mesophotic depths of 60–90 m off Bermuda. Genetic sequences (COI-5P, rbcL) and morphological characteristics show that this species is distinct from other known pseudodichotomous species of Dasya. Of ten current species in the genus reported from Bermuda, only three, D. collinsiana M.Howe, D. cryptica C.W.Schneid., Quach & C.E.Lane and D. punicea (Zanardini) Menegh., share the overall pattern of pseudodichotomous branching in their axes; however, key morphological features easily distinguish them from D. sylviae sp. nov. The species most similar in habit to D. sylviae sp. nov. is D. crouaniana J.Agardh (type locality West Indies), but it bears shorter pseudolateral branches, and broader and longer tetrasporangial stichidia than the new species. Unique among the species of Dasya, D. sylviae sp. nov. lacks post-sporangial cover cells in tetrasporangial stichidia.
topic western Atlantic
Dasya
mesophotic zone
Rhodophyta
url https://europeanjournaloftaxonomy.eu/index.php/ejt/article/view/1377
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