Netromorph acritarchs and related morphotypes in the middle Paleozoic: a proposal for classification.
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| Title: | Netromorph acritarchs and related morphotypes in the middle Paleozoic: a proposal for classification. |
|---|---|
| Authors: | Manzano, Eiver Gelan1 (AUTHOR) eivergelan.manzano@univ-lille.fr, Monnet, Claude1 (AUTHOR), Mertens, Kenneth Neil2 (AUTHOR), Servais, Thomas1 (AUTHOR) |
| Source: | Palynology. Aug2025, Vol. 49 Issue 3, p1-23. 23p. |
| Subjects: | Acritarchs, Fungal spores, Paleozoic Era, Euglenoids, Subspecies, Fossil microorganisms |
| Abstract: | Acritarchs are organic-walled microfossils that dominate the phytoplankton in Paleozoic seas. The current classification subdivides acritarchs into subgroups based on the outline of the main vesicle. Among them, the netromorphs include the fusiform morphotypes showing peak diversity during the middle Paleozoic. More than 300 species and subspecies have been reported in the literature, many of which are probably synonyms or ecophenotypes. We review and emend the definition of netromorphs, restricting them to homopolar forms and reassigning related heteropolar morphotypes (Deunffia–Domasia complex) to another subgroup: the diacromorphs. We propose a simplified classification scheme as follows: (i) Category 1, for elliptical forms; (ii) reniform Category 2; (iii) spindle-shaped Category 3; and (iv) a Category 4 of crescent-shaped genera. Morphologically-similar species within Leiofusa, Poikilofusa and Eupoikilofusa are merged into intrageneric morphotype groups. Several new combinations are proposed. The Deunffia–Domasia complex is also classified based on the presence of appendages, their number and the distal branches. Possible biological affinities of netromorphs to fungal spores, euglenids and turbellarian (flatworm) oocytes are also discussed. However, clear biological affinities remain uncertain, and further investigation is needed to determine whether netromorphs are exclusively phytoplanktonic or belong in part to various animal, fungal or algal groups. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 186347336 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Netromorph acritarchs and related morphotypes in the middle Paleozoic: a proposal for classification. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Manzano%2C+Eiver+Gelan%22">Manzano, Eiver Gelan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> eivergelan.manzano@univ-lille.fr</i><br /><searchLink fieldCode="AR" term="%22Monnet%2C+Claude%22">Monnet, Claude</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mertens%2C+Kenneth+Neil%22">Mertens, Kenneth Neil</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Servais%2C+Thomas%22">Servais, Thomas</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Palynology%22">Palynology</searchLink>. Aug2025, Vol. 49 Issue 3, p1-23. 23p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Acritarchs%22">Acritarchs</searchLink><br /><searchLink fieldCode="DE" term="%22Fungal+spores%22">Fungal spores</searchLink><br /><searchLink fieldCode="DE" term="%22Paleozoic+Era%22">Paleozoic Era</searchLink><br /><searchLink fieldCode="DE" term="%22Euglenoids%22">Euglenoids</searchLink><br /><searchLink fieldCode="DE" term="%22Subspecies%22">Subspecies</searchLink><br /><searchLink fieldCode="DE" term="%22Fossil+microorganisms%22">Fossil microorganisms</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Acritarchs are organic-walled microfossils that dominate the phytoplankton in Paleozoic seas. The current classification subdivides acritarchs into subgroups based on the outline of the main vesicle. Among them, the netromorphs include the fusiform morphotypes showing peak diversity during the middle Paleozoic. More than 300 species and subspecies have been reported in the literature, many of which are probably synonyms or ecophenotypes. We review and emend the definition of netromorphs, restricting them to homopolar forms and reassigning related heteropolar morphotypes (Deunffia–Domasia complex) to another subgroup: the diacromorphs. We propose a simplified classification scheme as follows: (i) Category 1, for elliptical forms; (ii) reniform Category 2; (iii) spindle-shaped Category 3; and (iv) a Category 4 of crescent-shaped genera. Morphologically-similar species within Leiofusa, Poikilofusa and Eupoikilofusa are merged into intrageneric morphotype groups. Several new combinations are proposed. The Deunffia–Domasia complex is also classified based on the presence of appendages, their number and the distal branches. Possible biological affinities of netromorphs to fungal spores, euglenids and turbellarian (flatworm) oocytes are also discussed. However, clear biological affinities remain uncertain, and further investigation is needed to determine whether netromorphs are exclusively phytoplanktonic or belong in part to various animal, fungal or algal groups. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Palynology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1080/01916122.2024.2446470 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 23 StartPage: 1 Subjects: – SubjectFull: Acritarchs Type: general – SubjectFull: Fungal spores Type: general – SubjectFull: Paleozoic Era Type: general – SubjectFull: Euglenoids Type: general – SubjectFull: Subspecies Type: general – SubjectFull: Fossil microorganisms Type: general Titles: – TitleFull: Netromorph acritarchs and related morphotypes in the middle Paleozoic: a proposal for classification. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Manzano, Eiver Gelan – PersonEntity: Name: NameFull: Monnet, Claude – PersonEntity: Name: NameFull: Mertens, Kenneth Neil – PersonEntity: Name: NameFull: Servais, Thomas IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 08 Text: Aug2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 01916122 Numbering: – Type: volume Value: 49 – Type: issue Value: 3 Titles: – TitleFull: Palynology Type: main |
| ResultId | 1 |
