The motile (Crystallolithus hyalinus Gaarder &amp; Markali) and non-motile phases in the life history of Coccolithus pelagicus (Wallich) Schiller

Parke, Mary; Adams, Irene

doi:10.1017/s002531540001331x

Cited by 181 publications

(79 citation statements)

References 9 publications

(10 reference statements)

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“…the coccolithophores, which provide excellent documentation of an alternation between haploid and diploid generations manifested through very distinct heteromorphic phases (Kamptner, 1941;Parke and Adams, 1960, Billard, 1994. Ongoing efforts towards unveiling as many as possible of these heterococcolithophore (2n) -holococcolithophore (1n) life histories has an immediate, however, temporarily complicating impact on the nomenclatural framework established for these organisms.…”

Section: Discussionmentioning

confidence: 99%

Circumstantial evidence of life history events in loricate choanoflagellates

Thomsen

Østergaard²

2017

European Journal of Protistology

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Please cite this article as: Thomsen, Helge Abildhauge, Østergaard, Jette Buch, Circumstantial evidence of life history events in loricate choanoflagellates.European Journal of Protistology http://dx.doi.org/10. 1016/j.ejop.2016.12.004 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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Section: Discussionmentioning

confidence: 99%

Circumstantial evidence of life history events in loricate choanoflagellates

Thomsen

Østergaard²

2017

European Journal of Protistology

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“…4,8 respectively). Evidence here arises from both culture studies (Parke and Adams 1960;Rowson et al 1986; Probert unpubl.) and life-cycle associations from combination coccospheres (Samtleben and Bickert 1990;Samtleben and Schröder 1992;Winter and Siesser 1994;Baumann et al 1997).…”

Section: Life-cycles and Holococcolith Phase Differentiationmentioning

confidence: 96%

“…Evidence of this stems from culture observations of phase transitions (e.g. Parke and Adams 1960), observations of meiosis and syngamy (Gayral and Fresnel 1983), chromosome counts (Rayns 1962;Fresnel 1994), flow cytometry on cultured clones (Probert unpubl. ), and observations of combination coccospheres from natural populations (for a review refer to Cros et al 2000;Cros and Fortuño 2002;Geisen et al 2002).…”

Section: Life-cycles and Holococcolith Phase Differentiationmentioning

confidence: 99%

“…Coccolithus pelagicus (Wallich 1877) is one of the most robust and longest ranging of extant coccolithophores and its life-cycle is exceptionally well documented (Parke and Adams 1960;Rowson et al 1986;Geisen et al 2002). It appeared in the early Palaeocene and it is common throughout the Cenozoic (Perch-Nielsen 1985), although this very long fossil record is based on a very broad species concept.…”

Section: Coccolithus Spp (Plate 2)mentioning

confidence: 99%

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Species level variation in coccolithophores

et al. 2004

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Coccolithophores are an ideal test group for investigating fine-scale differentiation within the phytoplankton since their taxonomy is rather well-documented and their biomineralised periplasts -the coccoliths -provide a rich suite of qualitative and quantitative morphological characters and a uniquely extensive fossil record. In addition, extant coccolithophore species can be grown in culture and hence are available for studies of morphological variability under controlled conditions, molecular genetic studies and cytological research.For the CODENET project the following extant species with seemingly global occurrence and spanning the biodiversity of coccolithophores were selected: Coccolithus pelagicus, Calcidiscus leptoporus, Umbilicosphaera sibogae, Syracosphaera pulchra, Gephyrocapsa oceanica, and Helicosphaera carteri. These were used as case studies to elucidate their species level biodiversity. The key merit of our approach was the use of multiple, independent lines of evidence, so as to remove the ambiguity implicit in any one type of study. In each case morphotypes of previously uncertain significance have been shown to represent discrete genotypes and probably well-separated species, with divergence times ranging 314 Geisen et al. from about 100 kyrs to >10 myrs. The evolutionary significance of these results is discussed.

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“…In recent years, the knowledge of coccolithophores has improved due, mainly, to an increase in detailed studies on these organisms using electron microscopy. The description of a number of holo-and heterococcolithophore combination coccospheres has suggested that the holo-and heterococcolithophore forms involved were part of the life cycle of the same species (Parke and Adams, 1960;Kleijne, 1991;Cros et al, 2000). In spite of this fact, the number of recognized species has increased.…”

Section: Introductionmentioning

confidence: 99%

Picarola margalefii, gen. et sp. nov., a new planktonic coccolithophore from NW Mediterranean waters

Cros¹,

Estrada²

2004

Sci. Mar.

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SUMMARY: A coccolithophore which is referred to a new genus Picarola gen. nov. and described as a new species Picarola margalefii sp. nov., has been observed from the NW Mediterranean. The description of the new species is based on Scanning Electronic Microscopy (SEM) observations. The coccoliths of Picarola margalefii sp. nov. are muroliths that have a narrow high rim and a central area with a cross and an elongate four-sided central process. Energy dispersive X-ray microanalyses confirmed their calcareous nature. The relation between the new genus and the genera Papposphaera Tangen, Vexillarius Jordan et Chamberlain, and Turrilithus Jordan et al., is discussed. The coccolithophore Picarola margalefii gen. et sp. nov., is dedicated to Dr. Ramon Margalef.Key words: Picarola margalefii, coccolithophore, Haptophyta, taxonomy, calcareous nannoplankton, living, Western Mediterranean.RESUMEN: PICAROLA MARGALEFII, GEN. ET SP. NOV., UN NUEVO COCOLITÓFORO PLANCTÓNICO DEL MEDITERRÁNEO NOROCCI-DENTAL. -Un cocolitóforo atribuido a un género nuevo, Picarola gen. nov., y descrito como una especie nueva, Picarola margalefii sp. nov., ha sido hallado en el Mediterráneo noroccidental. La descripción de la nueva especie se basa en observaciones realizadas con Microscopía Electrónica de Barrido. Los cocolitos de Picarola margalefii sp. nov. son murolitos que tienen un margen alto y estrecho y un área central que presenta una cruz con un largo proceso central de cuatro caras. Se confirmó su naturaleza calcárea mediante microanálisis basados en energía dispersiva de rayos X. Se discute la relación morfológica entre el género nuevo y los géneros Papposphaera Tangen, Vexillarius Jordan et Chamberlain, y Turrilithus Jordan et al. El nuevo cocolitóforo Picarola margalefii, gen et sp. nov., se dedica al Dr. Ramon Margalef.

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The motile (Crystallolithus hyalinus Gaarder & Markali) and non-motile phases in the life history of Coccolithus pelagicus (Wallich) Schiller

Cited by 181 publications

References 9 publications

Circumstantial evidence of life history events in loricate choanoflagellates

Circumstantial evidence of life history events in loricate choanoflagellates

Species level variation in coccolithophores

<i>Picarola margalefii</i>, gen. et sp. nov., a new planktonic coccolithophore from NW Mediterranean waters

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