Volume 58, Number 4 | Proceedings of the Yorkshire Geological Society

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Research Article

Research Article

Graptolite studies in honour of Barrie Rickards (1938–2009): an introduction

Andrea Snelling; Denis Bates; Jan Zalasiewicz

Proceedings of the Yorkshire Geological Society November 01, 2011, Vol.58, 208-210. doi:10.1144/pygs.58.4.311

Excessive thickening of the cortical layer in graptolites

Denis Bates; Anna Kozłowska; Dagmara Chmielarz; Alfred Lenz

Proceedings of the Yorkshire Geological Society November 01, 2011, Vol.58, 211-222. doi:10.1144/pygs.58.4.285

A critical graptolite correlation into the Lower Ordovician of Gondwana

Richard A. Fortey

Proceedings of the Yorkshire Geological Society November 01, 2011, Vol.58, 223-226. doi:10.1144/pygs.58.4.297

Biogeography and Mass Extinction: Extirpation and re-invasion of Normalograptus species (Graptolithina) in the Late Ordovician Palaeotropics

Daniel Goldman; Charles E. Mitchell; Michael J. Melchin; Junxuan Fan; Shuang-Ye Wu; H. David Sheets

Proceedings of the Yorkshire Geological Society November 01, 2011, Vol.58, 227-246. doi:10.1144/pygs.58.4.300

GrapEl – a simple spreadsheet application for managing and disseminating graptolite biozonal range chart data

Michael P. A. Howe

Proceedings of the Yorkshire Geological Society November 01, 2011, Vol.58, 247-252. doi:10.1144/pygs.58.4.298

Ontogeny and Astogeny of the Graptolite Genus Appendispinograptus (Li and Li, 1985)

J. Loxton; M. J. Melchin; C. E. Mitchell; S. J. H. Senior

Proceedings of the Yorkshire Geological Society November 01, 2011, Vol.58, 253-260. doi:10.1144/pygs.58.4.309

The Rhuddanian/Aeronian transition in the Rheidol Gorge, mid Wales

Alex A. Cullum; David K. Loydell

Proceedings of the Yorkshire Geological Society November 01, 2011, Vol.58, 261-266. doi:10.1144/pygs.58.4.299

Scandinavian Isograptids (Graptolithina, Isograptidae): Biostratigraphy and Taxonomy

Jörg Maletz

Proceedings of the Yorkshire Geological Society November 01, 2011, Vol.58, 267-280. doi:10.1144/pygs.58.4.295

Phylogeny and Adaptive Radiation of the Neograptina (Graptoloida) During the Hirnantian Mass Extinction and Silurian Recovery

M. J. Melchin; C. E. Mitchell; A. Naczk-Cameron; J. X. Fan; J. Loxton

Proceedings of the Yorkshire Geological Society November 01, 2011, Vol.58, 281-309. doi:10.1144/pygs.58.4.301

An unusual specimen of Glyptograptus from Dob's Linn (Southern Uplands, Scotland), and a discussion of graptolite teratomorphies

Lucy A. Muir

Proceedings of the Yorkshire Geological Society November 01, 2011, Vol.58, 311-317. doi:10.1144/pygs.58.4.294

Deflexed didymograptids from the Lower Ordovician Skiddaw Group of northern England

A. W. A. Rushton

Proceedings of the Yorkshire Geological Society November 01, 2011, Vol.58, 319-327. doi:10.1144/pygs.58.4.293

Sequencing the graptoloid clade: building a global diversity curve from local range charts, regional composites and global time-lines

Peter M. Sadler; Roger A. Cooper; Michael J. Melchin

Proceedings of the Yorkshire Geological Society November 01, 2011, Vol.58, 329-343. doi:10.1144/pygs.58.4.296

The evolutionary lineage of Petalolithus to Cephalograptus: evidence from Coalpit Bay, Northern Ireland

Andrea M. Snelling; Jan A. Zalasiewicz

Proceedings of the Yorkshire Geological Society November 01, 2011, Vol.58, 345-350. doi:10.1144/pygs.58.4.305

The systematic relationship of the monograptid species acinaces Törnquist, 1899 and rheidolensis Jones, 1909

Jan Zalasiewicz; Catherine Russell; Andrea Snelling; Mark Williams

Proceedings of the Yorkshire Geological Society November 01, 2011, Vol.58, 351-356. doi:10.1144/pygs.58.4.306

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Research Article

Graptolite studies in honour of Barrie Rickards (1938–2009): an introduction

Excessive thickening of the cortical layer in graptolites

A critical graptolite correlation into the Lower Ordovician of Gondwana

Biogeography and Mass Extinction: Extirpation and re-invasion of Normalograptus species (Graptolithina) in the Late Ordovician Palaeotropics

GrapEl – a simple spreadsheet application for managing and disseminating graptolite biozonal range chart data

Ontogeny and Astogeny of the Graptolite Genus Appendispinograptus (Li and Li, 1985)

The Rhuddanian/Aeronian transition in the Rheidol Gorge, mid Wales

Scandinavian Isograptids (Graptolithina, Isograptidae): Biostratigraphy and Taxonomy

Phylogeny and Adaptive Radiation of the Neograptina (Graptoloida) During the Hirnantian Mass Extinction and Silurian Recovery

An unusual specimen of Glyptograptus from Dob's Linn (Southern Uplands, Scotland), and a discussion of graptolite teratomorphies

Deflexed didymograptids from the Lower Ordovician Skiddaw Group of northern England

Sequencing the graptoloid clade: building a global diversity curve from local range charts, regional composites and global time-lines

The evolutionary lineage of Petalolithus to Cephalograptus: evidence from Coalpit Bay, Northern Ireland

The systematic relationship of the monograptid species acinaces Törnquist, 1899 and rheidolensis Jones, 1909

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