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2023
Journal article
The geological and historical milieu of an ornamental cephalopod limestone (‘orthoceratite limestone’, Ordovician, Sweden) used in the Clerk Mausoleum (1684), St Mungo's Kirkyard, Penicuik, Scotland
A slab of cephalopod limestone bears a dedicatory Latin inscription on the mausoleum built around 1684 by Sir John Clerk of Penicuik (1649–1722) for his wife Elizabeth Henderson (1658–83) at St Mungo's Church, Penicuik, near Edinburgh, Scotland. The stone is identified on sedimentological and palaeontological evidence and historical context as... -
Journal article
Taxonomy and evolution of the protomonaxonid sponge family Piraniidae
The protomonaxonid sponge Pirania is an iconic member of the Burgess Shale community, but recent discoveries show that piraniids are morphologically diverse and also occur in Ordovician strata. Here we establish three new piraniid genera on the basis of Ordovician material from China, Wales, Scotland and Morocco: Auraeopirania gen. nov.,...Botting, Joseph P ; Stewart, Sarah E ; Muir, Lucy A
Sweden, Furongian, Sphenothallus, Cambrian, Alum Shale Formation, and Västergötland
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2015
Journal article
Sphenothallus from the Furongian (Cambrian) of Scandanavia
Sphenothallus, a Palaeozoic genus of uncertain affinity, possibly a hydrozoan, is reported from the Furongian (Cambrian) of Scandinavia. This is the only known occurrence of the genus in Cambrian rocks outside of China, western North America and Bohemia, and also the first report of Sphenothallus in the Cambrian–Ordovician of Baltica....Stewart, Sarah E ; Clarkson, Euan Neilson Kerr ; Ahlgren, John ; Ahlgren, Per ; Schoenemann, Brigitte
Sweden, Furongian, Sphenothallus, Cambrian, Alum Shale Formation, and Västergötland
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2015
Journal article
The youngest ctenocystoids from the Upper Ordovician of the United Kingdom and the evolution of the bilateral body plan in echinoderms
During the early Palaeozoic, echinoderm body plans were much more diverse than they are today, displaying four distinct types of symmetry. This included the bilateral ctenocystoids, which were long thought to be restricted to the Cambrian. Here, we describe a new species of ctenocystoid from the Upper Ordovician of Scotland...Rahman, Imran A ; Stewart, Sarah E ; Samuel, Zamora
bilateral symmetry, United Kingdom, Echinodermata, Ordovician, Ctenocystoidea, body plans, and evolution
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2007
Journal article
An Upper Llandovery Konservat-Lagerstatte in a depositional context: the Pentland Hills Eurypterid Bed, Midlothian
Re-excavation and detailed logging of the sedimentary sequence which includes the Eurypterid Bed on the Gutterford Burn, Pentland Hills, Midlothian, has clarified the depositional setting of this Silurian Konservat–Lagerstätte. The relative positions of the Gutterford Burn limestones, beds yielding dendroid graptolites and the Eurypterid Bed itself have been identified. Clay...Anderson, Lyall I ; Clarkson, E N K ; Stewart, Sarah E ; Mitchell, D
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2013
Journal article
The Ellismuir fossil arachnid- the only known Scottish Carboniferous trigonotarbid
Elaverimartus pococki Petrunkevitch 1953 from above the Kiltongue Coal Seam (Langsettian) of Ellismuir, Baillieston (Glasgow) is the only example of the extinct arachnid order Trigonotarbida recorded from the Carboniferous Coal Measures of Scotland. The fossil is from the Robert Dunlop collection and, although not so well preserved, historical documentation in...Dunlop, J A ; Ross, Andrew ; Stewart, Sarah E