References:— Hustedt (1930), Rines & Hargraves (1988), Hernández-Becerril (1996), Jensen & Moestrup (1998), Lee et al. (2014b).
Synonyms: — Chaetoceros borealis var. densa Cleve, Chaetoceros borealis var. brigthwellii Cleve, Chaetoceros brightwellii (Cleve) Mills.
Morphometry: —a.a.: 17–38 μm; p.a.: 13–63 μm
LM: —Cells are united into robust, straight and long chains. Cells are rectangular in girdle view with diagonally cut valve corners (Fig. 13). Cells and setae contain numerous small chloroplasts. The valve face is flat or slightly concave; the mantle is high and shows a visible constriction at its edge (Fig. 13). A simple hole-shaped rimoportula is present in the centre of each valve (Fig. 14). The long, thick and straight setae originate inside the valve margin. Apertures are narrow and slit- or hexagonally shaped (Fig. 13). In valve view, the intercalary setae diverge from the apical plane at equal angles (ca. 30–45°) (Fig. 14). Terminal setae are almost parallel to the chain axis.
EM: —The setae are four-sided (not shown) with the rows of sharp stipule-shaped spines on the ridges. Each side is perforated by small poroids arranged in a grid pattern, comprising 12–15 longitudinal rows and a single row of poroids between transverse costae (Fig. 15).
Distinctive features: —Very narrow apertures. Four-sided setae with each side ornamented with small poroids arranged in a grid pattern, with 12–15 longitudinal rows of poroids.
", "identifiers": [ { "identifier": "http://treatment.plazi.org/id/038587FE514CFFEC6AE5FDA8DE0DFB42", "scheme": "url" } ], "publication_date": "2017-07-21", "publisher": "Zenodo", "references": [ { "reference": "Cleve, P. T. (1901) The seasonal distribution of Atlantic plankton-organisms. Goteborgs Kongliga Vetenskaps- och Vitterhets-samhalle handlingar, Goteborg, 368 pp." }, { "reference": "Hustedt, F. (1930) Die Kieselalgen Deutschlands, Osterrreichs und der Schweiz under Berucksichtigung der ubrigen Lander Europas sowie der angrenzenden Meeresgebiete. 1. Teil. Akademische Verlaggesellschaft, Leipzig, 920 pp." }, { "reference": "Rines, J. E. B. & Hargraves, P. E. (1988) The Chaetoceros Ehrenberg (Bacillariophyceae) Flora of Narragansett Bay, Rhode Island, U. S. A. Bibliotheca Phycologica, Band 79, J. Cramer, Berlin, 196 pp." }, { "reference": "Hernandez-Becerril, D. U. (1996) A morphological study of Chaetoceros species (Bacillariophyta) from the plankton of the Pacific Ocean of Mexico. Bullettin of the Natural History Museum of London 26: 1 - 73." }, { "reference": "Jensen, K. G. & Moestrup, O. (1998) The genus Chaetoceros (Bacillariophyceae) in innner Danish coastal waters. Opera Botanica 133: 1 - 68." }, { "reference": "Lee, S. D., Park, J. S., Yun, S. M. & Lee, J. H. (2014 b) Critical criteria for identification of the genus Chaetoceros (Bacillariophyta) based on setae ultrastructure. I. Subgenus Chaetoceros. Phycologia 53: 174 - 187. https: // doi. org / 10.2216 / 13 - 154.1" } ], "related_identifiers": [ { "identifier": "10.11646/phytotaxa.314.1.1", "relation_type": { "id": "ispartof", "title": { "de": "Ist Teil von", "en": "Is part of" } }, "resource_type": { "id": "publication-article", "title": { "de": "Zeitschriftenartikel", "en": "Journal article" } }, "scheme": "doi" }, { "identifier": "http://zenodo.org/record/13700770", "relation_type": { "id": "ispartof", "title": { "de": "Ist Teil von", "en": "Is part of" } }, "resource_type": { "id": "publication-article", "title": { "de": "Zeitschriftenartikel", "en": "Journal article" } }, "scheme": "url" }, { "identifier": "http://publication.plazi.org/id/FFBCFF865144FFE46A6DFFCBDD70FFEC", "relation_type": { "id": "ispartof", "title": { "de": "Ist Teil von", "en": "Is part of" } }, "resource_type": { "id": "publication-article", "title": { "de": "Zeitschriftenartikel", "en": "Journal article" } }, "scheme": "url" }, { "identifier": "https://sibils.text-analytics.ch/search/collections/plazi/038587FE514CFFEC6AE5FDA8DE0DFB42", "relation_type": { "id": "issourceof", "title": { "de": "Ist Quelle von", "en": "Is source of" } }, "scheme": "url" }, { "identifier": "10.5281/zenodo.13700776", "relation_type": { "id": "cites", "title": { "de": "Zitiert", "en": "Cites" } }, "resource_type": { "id": "image-figure", "title": { "de": "Abbildung", "en": "Figure" } }, "scheme": "doi" } ], "resource_type": { "id": "publication-taxonomictreatment", "title": { "de": "Taxonomische Behandlung", "en": "Taxonomic treatment" } }, "rights": [ { "description": { "en": "CC0 waives copyright interest in a work you've created and dedicates it to the world-wide public domain. Use CC0 to opt out of copyright entirely and ensure your work has the widest reach." }, "icon": "cc-cc0-icon", "id": "cc0-1.0", "props": { "scheme": "spdx", "url": "https://creativecommons.org/publicdomain/zero/1.0/legalcode" }, "title": { "en": "Creative Commons Zero v1.0 Universal" } } ], "subjects": [ { "subject": "Biodiversity" }, { "subject": "Taxonomy" }, { "subject": "Chromista" }, { "subject": "Ochrophyta" }, { "subject": "Bacillariophyceae" }, { "subject": "Chaetocerotales" }, { "subject": "Chaetocerotaceae" }, { "subject": "Chaetoceros" }, { "subject": "Chaetoceros densus" } ], "title": "Chaetoceros densus Cleve 1901" }, "parent": { "access": { "owned_by": { "user": "1161" }, "settings": { "accept_conditions_text": null, "allow_guest_requests": false, "allow_user_requests": false, "secret_link_expiration": 0 } }, "communities": { "default": "c529f97d-f8cb-4c13-a439-9e36891694c2", "entries": [ { "access": { "member_policy": "open", "members_visibility": "public", "record_submission_policy": "open", "review_policy": "open", "visibility": "public" }, "children": { "allow": true }, "created": "2013-11-11T14:14:18+00:00", "custom_fields": {}, "deletion_status": { "is_deleted": false, "status": "P" }, "id": "c529f97d-f8cb-4c13-a439-9e36891694c2", "links": {}, "metadata": { "curation_policy": "The Biodiversity Literature Repository (BLR) is to share publications related to bio-systematics. The goal is to provide
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