Very large acritarchs from the Furongian (upper Cambrian) rocks of the Holy Cross Mountains, central Poland

Szczepanik, Zbigniew; Servais, Thomas; Żylińska, Anna

doi:10.1080/01916122.2017.1366205

Cited by 2 publications

(3 citation statements)

References 11 publications

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“…1. Archeodiscina in Slater and Willman (2019), Asteridium in Szczepanik and Żylińska (2021), Pterospermopsimorpha in Jachowicz-Zdanowska (2013). 2.…”

Section: Resultsmentioning

confidence: 99%

Acritarch clusters from the Cambrian (Miaolingian) of the Příbram-Jince Basin, Czech Republic

2022

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Monogeneric clusters of five acritarch genera (Adara, Cymatiosphaera, Eliasum, Synsphaeridium and Timofeevia) were discovered in palynological residues obtained from fine-grained siliciclastic samples from the middle Cambrian (Miaolingian) Jince Formation of the P r ıbram-Jince Basin (Czech Republic). The clusters consist of two to more than 100 individual specimens and lack a common pattern of organisation. Acritarchs within clusters fall within a similar size range, regardless of generic affinity. Proposed mechanisms for the formation of these acritarch clusters are discussed: for the Jince Formation clusters, aggregation within algal blooms or primary colonial behaviour are the most plausible explanations. In addition, a summary of reports of acritarch clusters from lower Palaeozoic strata is included: clusters of a variety of acritarch genera have been documented from rocks of early Cambrian to Late Devonian age.

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“…1. Archeodiscina in Slater and Willman (2019), Asteridium in Szczepanik and Żylińska (2021), Pterospermopsimorpha in Jachowicz-Zdanowska (2013). 2.…”

Section: Resultsmentioning

confidence: 99%

Acritarch clusters from the Cambrian (Miaolingian) of the Příbram-Jince Basin, Czech Republic

2022

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“…Occurrence and stratigraphical range. Terreneuvian of Poland ( Asteridium tornatum – Comasphaeridium velvetum Zone; Moczydłowska and Vidal 1986; Moczydłowska 1988, 1991) and Newfoundland ( Asteridium interval Zone; Palacios et al 2018); Terreneuvian and Cambrian Stage 3 of South China (Zheng et al 2020; Wang et al 2022), the Czech Republic and Poland ( Ichnosphaera flexuosa – Comasphaeridium molliculum Zone; Vavrdová et al 2003; Jachowicz-Zdanowska 2011a, 2013; Szczepanik and Żylińska 2021) and Cambrian Stages 3–4 of North Greenland ( Heliosphaeridium dissimilare – Skiagia ciliosa Zone; this study).…”

Section: Systematic Palaeontologymentioning

confidence: 99%

“…Occurrence and stratigraphical range. Cambrian Stages 3 of the East European Platform ( Skiagia ornata – Fimbriaglomerella membranacea Zone; Volkova et al 1979), Canada (Palacios et al 2018), Estonia (Moczydłowska 2011); Poland (Moczydłowska 1991; Jachowicz-Zdanowska 2013) and the Czech Republic (Jachowicz-Zdanowska 2013); Cambrian Stages 3–4 ( Skiagia ornata – Fimbriaglomerella membranacea and Heliosphaeridium dissimilare – Skiagia ciliosa zones) of Denmark (Moczydłowska and Vidal 1992), Sweden, Norway (Moczydłowska and Vidal 1986; Hagenfeldt 1989b; Moczydłowska et al 2001; Moczydłowska 2002) and Greenland (Moczydłowska and Vidal 1986; Vidal and Peel 1993); Terreneuvian of the Czech Republic and Poland (Vavrdová et al 2003; Szczepanik and Żylińska 2021), early Cambrian of Ireland (Brück and Vanguestaine 2004).…”

Section: Systematic Palaeontologymentioning

confidence: 99%

Organic-walled microfossils from the lower Cambrian of North Greenland: a reappraisal of diversity

Wallet,

Slater,

Willman

2023

Palynology

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The early Cambrian Buen Formation (North Greenland) hosts an exceptionally rich fossil biota that has contributed significantly to our knowledge of early metazoans, yet the fossil remains of primary producers from this deposit have received less attention. Here we examine the palynological component of the Buen Formation, with a focus on acritarchs and filamentous microfossils. Our analysis revealed the presence of 49 form taxa, 15 of which are described for the first time in the Buen Formation. These include large elements of presumably benthic origin, together with cyst-like acritarchs. Comasphaeridium longispinosum Vidal 1993 is renamed Comasphaeridium? brillesensis nom. nov., and Comasphaeridium densispinosum Vidal 1993 is reassigned to a new genus, Pearisphaeridium, becoming Pearisphaeridium densispinosum comb. nov. The diagnoses of Pearisphaeridium densispinosum (Vidal 1993) comb. nov. and Skiagia pura Moczydłowska 1988 are emended. Further, careful analysis of disparity in the recovered assemblage has revealed the presence of numerous transitional morphologies among the recorded acritarch form taxa. Though some of these transitional forms likely represent biologically meaningful entities (e.g. life cycle stages, ecophenotypes), others appear to have been artificially generated by taphonomic processes. Accounting for taphonomic factors and other sources of morphological variation has curtailed diversity down to 30 acritarch morphotypes, ten of which represent distinct abundance peaks broadly corresponding to acritarch genera. This analysis illustrates how population-based studies of early Cambrian acritarchs can help to discern the different factors that impinge on acritarch morphology, detect instances of taxonomic inflation, and refine our measures of diversity at the base of early Palaeozoic food webs.

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Very large acritarchs from the Furongian (upper Cambrian) rocks of the Holy Cross Mountains, central Poland

Cited by 2 publications

References 11 publications

Acritarch clusters from the Cambrian (Miaolingian) of the Příbram-Jince Basin, Czech Republic

Acritarch clusters from the Cambrian (Miaolingian) of the Příbram-Jince Basin, Czech Republic

Organic-walled microfossils from the lower Cambrian of North Greenland: a reappraisal of diversity

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