Variation in Stomatal Density in the Late Carboniferous Gymnosperm Frond Neuropteris Ovata

Cleal, Christopher J.; James, Robert M.; Zodrow, Erwin L.

doi:10.2307/3515373

Cited by 29 publications

(24 citation statements)

References 20 publications

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“…SD versus time for the Phanerozoic. Redrawn from Beerling and Woodward (1997), with additional data plotted from McElwain and Chaloner (1996), Edwards et al (1998), McElwain (1998), Cleal et al (1999) and McElwain et al (1999). Regression is a third order polynomial r 2 0:57; n 132 : Compare trend with Fig.…”

Section: Combined Data Setmentioning

confidence: 95%

Stomatal density and stomatal index as indicators of paleoatmospheric CO2 concentration

Royer

2001

Review of Palaeobotany and Palynology

373

316

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Section: Combined Data Setmentioning

confidence: 95%

Stomatal density and stomatal index as indicators of paleoatmospheric CO2 concentration

Royer

2001

Review of Palaeobotany and Palynology

373

316

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“…These patterns appear to be a response to a strong pulse of global warming at or near the WestphalianStephanian boundary (Frakes et al, 1992;Cleal and Thomas, 2005). Possibly, warming was caused by an increase in atmospheric COj (Cleal et al, 1999), followed by a generally warmer, though not ice-free, world through most of the Stephanian. The details of this change are well documented in the literature and occur in both the floras of peat-forming environments and in that of mineral soil/clastic wetlands.…”

Section: Threshold-like Floristic Response To Climatic and Environmenmentioning

confidence: 99%

Pennsylvanian tropical floras from the United States as a record of changing climate

Pfefferkorn¹,

Gastaldo²,

DiMichele³

et al. 2008

Special Paper 441: Resolving the Late Paleozoic Ice Age in Time and Space

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“…10); medullosalean cuticular analysis Canada-Saarland and proposal for a new neuropterid taxonomy (Cleal et al 1990); and the relationship of stomatal-density distribution and Late Carboniferous climate change (Cleal et al 1999). These were followed by first-time applications of advanced spectrochemical methods to the study of N. ovata in an effort to elucidate biomolecular (cutin structure), and information and coalification pattern.…”

mentioning

confidence: 99%

The Neuropteris ovata frond and its cyclopteroids: micromorphology-spectrochemistry-fractal taxonomy: Propositions for restructuring and taxonomy (Pennsylvanian, Canada)

Zodrow¹,

D’Angelo²,

Cleal³

2017

Bull. Geosci.

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The primary study material consists of the 65-cm frond Neuropteris ovata (Hoffmann) var. simonii, associate petiole with organically attached cyclopteroid leaflets and trunk. Ancillary N. ovata material is used, all from the Asturian-Cantabrian strata of the Sydney Coalfield, Canada. This material is appropriate for the objective of the study to present an ovata-frond Aufbau in terms of micromorphology coupled with chemistry using an holistic sampling design (co-ordinating epidermal microscopy with chemistry per sample location). Chemical analyses were obtained by the reliable FTIR technique (Fourier transform infrared spectroscopy) and interpreted via chemometrics by methods of principal component analysis. Fractal geometry is introduced as a promising taxonomic parameter. The main conclusions include that the N. ovata plant can be characterized by three distinct epidermal structures: (1) rectangular elongate (trunk and petiole), (2) elongate (rachides of three orders), and (3) undulate (pinnule), which to a certain extent agrees with the chemistry of the frond Aufbau. The frond was also complex -architecturally, histologically, physiologically, chemically and autecologically. It was photosynthetic, had secretory organs (implying a characteristic plant aroma), supporting rodlets, divers epicuticular features, and a distinct chemical composition/structure. The frond was likely 4 m long with complex-pinnate cyclopteroid leaflets, fimbriate or entire-margined, below and above the main bifurcation, which begs the question of cyclopteroid definition and function. The overall results will be beneficial to taxonomy/systematics, and guide pteridospermous reconstruction into a new paradigm. •

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Variation in Stomatal Density in the Late Carboniferous Gymnosperm Frond Neuropteris Ovata

Cited by 29 publications

References 20 publications

Stomatal density and stomatal index as indicators of paleoatmospheric CO2 concentration

Stomatal density and stomatal index as indicators of paleoatmospheric CO2 concentration

Pennsylvanian tropical floras from the United States as a record of changing climate

The Neuropteris ovata frond and its cyclopteroids: micromorphology-spectrochemistry-fractal taxonomy: Propositions for restructuring and taxonomy (Pennsylvanian, Canada)

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