Scalariella a new genus of monoraphid diatom (Bacillariophyta) with a bipolar distribution
International audience The identity of a small-celled diatom Naviculadicta pseudofallacia WITKOWSKI, METZELTIN et LANGE-BERTALOT, originally described from Bear Island, southernmost island of the Norwegian archipelago Svalbard, is reconsidered. Observations of marine samples from the Kerguelen archi...
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ftunivnantes:oai:HAL:hal-00722763v1 2023-05-15T15:40:01+02:00 Scalariella a new genus of monoraphid diatom (Bacillariophyta) with a bipolar distribution Riaux-Gobin, Catherine Witkowski, Andrzej Ruppel, Manfred Centre de recherches insulaires et observatoire de l'environnement (CRIOBE) Université de Perpignan Via Domitia (UPVD)-École pratique des hautes études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Department of Palaeoceanology University of Szczecin Fachbereich Biowissenschaften Goethe Goethe-Universität Frankfurt am Main 2012 https://hal.archives-ouvertes.fr/hal-00722763 https://doi.org/10.5507/fot.2012.002 en eng HAL CCSD Czech Phycological Society info:eu-repo/semantics/altIdentifier/doi/10.5507/fot.2012.002 hal-00722763 https://hal.archives-ouvertes.fr/hal-00722763 doi:10.5507/fot.2012.002 ISSN: 1802-5439 EISSN: 1805-4927 Fottea (Praha) https://hal.archives-ouvertes.fr/hal-00722763 Fottea (Praha), Czech Phycological Society, 2012, 12 (1), pp.13-25. ⟨10.5507/fot.2012.002⟩ [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/article Journal articles 2012 ftunivnantes https://doi.org/10.5507/fot.2012.002 2022-10-04T22:51:11Z International audience The identity of a small-celled diatom Naviculadicta pseudofallacia WITKOWSKI, METZELTIN et LANGE-BERTALOT, originally described from Bear Island, southernmost island of the Norwegian archipelago Svalbard, is reconsidered. Observations of marine samples from the Kerguelen archipelago (Southern Ocean, Indian Ocean sector) revealed that this species also occurs in the Subantarctic region. The original classification within Naviculadicta was erroneous since this species is a monoraphid taxon and belongs to the Achnanthales. Its morphological features justify creating a new genus Scalariella RIAUX-GOBIN, which is distinguished from other achnanthoid genera by a peculiar raphe system, the stria structure of the sternum valve (each stria composed of a depressed macroareola), and the presence of a lateral solid area in the raphe valve, splitting each stria into two areolae. Based on light and electron microscopy, N. pseudofallacia is renamed Scalariella pseudofallacia (WITKOWSKI, METZELTIN et LANGE-BERTALOT) RIAUX-GOBIN et WITKOWSKI comb. nov. The genus also includes a second and rare species, observed in the Kerguelen material, S. oblongella RIAUX-GOBIN, WITKOWSKI et RUPPEL, which is described and illustrated, but which needs complementary observations. The morphology of Scalariella is compared to that of some genera split from the genus Achnanthes BORY. The biogeography of Scalariella pseudofallacia, a marine taxon probably misidentified in the past due to its small size, is reconsidered with respect to its affinity for subpolar, cold water habitats, in both hemispheres. Article in Journal/Newspaper Bear Island Southern Ocean Svalbard Université de Nantes: HAL-UNIV-NANTES Southern Ocean Svalbard Kerguelen Indian Bear Island ENVELOPE(-67.250,-67.250,-68.151,-68.151) Bory ENVELOPE(40.372,40.372,64.489,64.489) Fottea 12 1 13 25 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology Riaux-Gobin, Catherine Witkowski, Andrzej Ruppel, Manfred Scalariella a new genus of monoraphid diatom (Bacillariophyta) with a bipolar distribution |
topic_facet |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
International audience The identity of a small-celled diatom Naviculadicta pseudofallacia WITKOWSKI, METZELTIN et LANGE-BERTALOT, originally described from Bear Island, southernmost island of the Norwegian archipelago Svalbard, is reconsidered. Observations of marine samples from the Kerguelen archipelago (Southern Ocean, Indian Ocean sector) revealed that this species also occurs in the Subantarctic region. The original classification within Naviculadicta was erroneous since this species is a monoraphid taxon and belongs to the Achnanthales. Its morphological features justify creating a new genus Scalariella RIAUX-GOBIN, which is distinguished from other achnanthoid genera by a peculiar raphe system, the stria structure of the sternum valve (each stria composed of a depressed macroareola), and the presence of a lateral solid area in the raphe valve, splitting each stria into two areolae. Based on light and electron microscopy, N. pseudofallacia is renamed Scalariella pseudofallacia (WITKOWSKI, METZELTIN et LANGE-BERTALOT) RIAUX-GOBIN et WITKOWSKI comb. nov. The genus also includes a second and rare species, observed in the Kerguelen material, S. oblongella RIAUX-GOBIN, WITKOWSKI et RUPPEL, which is described and illustrated, but which needs complementary observations. The morphology of Scalariella is compared to that of some genera split from the genus Achnanthes BORY. The biogeography of Scalariella pseudofallacia, a marine taxon probably misidentified in the past due to its small size, is reconsidered with respect to its affinity for subpolar, cold water habitats, in both hemispheres. |
author2 |
Centre de recherches insulaires et observatoire de l'environnement (CRIOBE) Université de Perpignan Via Domitia (UPVD)-École pratique des hautes études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Department of Palaeoceanology University of Szczecin Fachbereich Biowissenschaften Goethe Goethe-Universität Frankfurt am Main |
format |
Article in Journal/Newspaper |
author |
Riaux-Gobin, Catherine Witkowski, Andrzej Ruppel, Manfred |
author_facet |
Riaux-Gobin, Catherine Witkowski, Andrzej Ruppel, Manfred |
author_sort |
Riaux-Gobin, Catherine |
title |
Scalariella a new genus of monoraphid diatom (Bacillariophyta) with a bipolar distribution |
title_short |
Scalariella a new genus of monoraphid diatom (Bacillariophyta) with a bipolar distribution |
title_full |
Scalariella a new genus of monoraphid diatom (Bacillariophyta) with a bipolar distribution |
title_fullStr |
Scalariella a new genus of monoraphid diatom (Bacillariophyta) with a bipolar distribution |
title_full_unstemmed |
Scalariella a new genus of monoraphid diatom (Bacillariophyta) with a bipolar distribution |
title_sort |
scalariella a new genus of monoraphid diatom (bacillariophyta) with a bipolar distribution |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.archives-ouvertes.fr/hal-00722763 https://doi.org/10.5507/fot.2012.002 |
long_lat |
ENVELOPE(-67.250,-67.250,-68.151,-68.151) ENVELOPE(40.372,40.372,64.489,64.489) |
geographic |
Southern Ocean Svalbard Kerguelen Indian Bear Island Bory |
geographic_facet |
Southern Ocean Svalbard Kerguelen Indian Bear Island Bory |
genre |
Bear Island Southern Ocean Svalbard |
genre_facet |
Bear Island Southern Ocean Svalbard |
op_source |
ISSN: 1802-5439 EISSN: 1805-4927 Fottea (Praha) https://hal.archives-ouvertes.fr/hal-00722763 Fottea (Praha), Czech Phycological Society, 2012, 12 (1), pp.13-25. ⟨10.5507/fot.2012.002⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5507/fot.2012.002 hal-00722763 https://hal.archives-ouvertes.fr/hal-00722763 doi:10.5507/fot.2012.002 |
op_doi |
https://doi.org/10.5507/fot.2012.002 |
container_title |
Fottea |
container_volume |
12 |
container_issue |
1 |
container_start_page |
13 |
op_container_end_page |
25 |
_version_ |
1766372121417613312 |