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A new hexactinellid sponge from the Silurian of the Pentland Hills (Scotland) with similarities to extant rossellids

Published online by Cambridge University Press:  13 March 2019

Joseph P. BOTTING*
Nanjing Institute of Geology and Palaeontology, 39 East Beijing Road, Nanjing 210008, China. Email: Department of Natural Sciences, Amgueddfa Cymru – National Museum Wales, Cathays Park, Cardiff CF10 3LP, UK.
National Museum of Scotland, Chambers Street, Edinburgh EH1 1JF, UK.
National Museums Collections Centre, 242 West Granton Road, Edinburgh EH5 1JA, UK.
William R. B. CRIGHTON
National Museums Collections Centre, 242 West Granton Road, Edinburgh EH5 1JA, UK.
*Corresponding author


The Pentland Hills sponge fauna (Llandovery, Telychian) consists of an unusual, aberrant assemblage, but of low diversity. A new specimen of a unique sponge, Eoghanospongia carlinslowpensis gen. et sp. nov., is described from the classic locality of R82. The mushroom-shaped, probably stalked body (peduncle attachment to body not exposed) resembles that of some living rossellids, especially Caulophacus. The sponge also shows prominent projecting pentactins and monaxon derivatives – a spicule type diagnostic of the Rossellidae among living taxa, albeit in a robust form not described from extant sponges, including Caulophacus or other pedunculate lyssacinosidans. Certain attribution to the Rossellidae is not possible from the single specimen, largely because of weak preservation of the primary spicule skeleton, but no other fossil or modern sponges show any significant similarity to it. Although similarly early relatives of the Rossellidae have recently been described from elsewhere, the new sponge is even more unexpected in being from a shallow-water environment, making the absence of rossellids through the rest of the Palaeozoic much more problematic.

Copyright © The Royal Society of Edinburgh 2019 

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7. References

Aizenberg, J., Weaver, J. C., Thanawala, M. S., Sundar, V. C., Morse, D. E. & Fratzl, P. 2005. Skeleton of Euplectella sp.: structural hierarchy from the nanoscale to the macroscale. Science 309, 275278.Google Scholar
Beresi, M. S., Botting, J. P. & Clarkson, E. N. K. 2010. A new demosponge, Choiaella scotica, from the Caradoc (Ordovician) of Wallace's Cast, Southern Uplands. Scottish Journal of Geology 46, 7783.Google Scholar
Botting, J. P. 2003. Growth patterns of Lower Palaeozoic sponges. Lethaia 36, 4152.Google Scholar
Botting, J. P. 2004. A revision of the hexactinellid sponge Amphispongia oblonga Salter, 1861: not a dasycladacean alga. Scottish Journal of Geology 40, 115118.Google Scholar
Botting, J. P. 2005. Exceptionally-preserved Middle Ordovician sponges from the Llandegley Rocks Lagerstatte, Wales. Palaeontology 48, 577617.Google Scholar
Botting, J. P. 2007a. Algae, receptaculitids and sponges. In Clarkson, E. N. K., Harper, D. A. T., Taylor, C. M. & Anderson, L. I. (eds) Silurian fossils of the Pentland Hills, Scotland. Field Guide to Fossils 11, 3649. London: The Palaeontological Association.Google Scholar
Botting, J. P. 2007b. ‘Cambrian' demosponges in the Ordovician of Morocco: insights into the early evolutionary history of sponges. Geobios 40, 737748.Google Scholar
Botting, J. P., Muir, L. A. & Lin, J-P. 2013. Relationships of the Cambrian Protomonaxonida (Porifera). Palaeontologia Electronica. Scholar
Botting, J. P., Zhang, Y. & Muir, L. A. 2018. A candidate stem-group rossellid (Porifera, Hexactinellida) from the latest Ordovician Anji Biota, China. Bulletin of Geosciences 93, 275285.Google Scholar
Botting, J. P. & Muir, L. A. 2013. Spicule structure and affinities of the Late Ordovician hexactinellid-like sponge Cyathophycus loydelli from the Llanfawr Mudstones Lagerstätte, Wales. Lethaia 46, 454469.Google Scholar
Botting, J. P. & Muir, L. A. 2018. Early sponge evolution: a review and phylogenetic framework. Palaeoworld 27, 129.Google Scholar
Botting, J. P. & Rhebergen, F. 2011. A remarkable new Middle Sandbian (Ordovician) hexactinellid sponge in Baltic erratics. Scripta Geologica 143, 114.Google Scholar
Boué, A. 1820. Essai géologique sur l'Ecosse. Paris: Courcier. 519 pp.Google Scholar
Candela, Y. & Crighton, R. B. 2015. Revision of Plumulites ruskini Lamont, and new data from the Silurian of the Pentland Hills, Scotland. Scottish Journal of Geology 51, 3142.Google Scholar
Clarkson, E. N. K., Harper, D. A. T., Taylor, C. M. & Anderson, L. I. 2007. Silurian fossils of the Pentland Hills, Scotland. Field Guide to Fossils 11. London: The Palaeontological Association. 218 pp.Google Scholar
Clarkson, E. N. K. & Taylor, C. M. 2007. Silurian rocks and fossils in the Pentland Hills. In Clarkson, E. N. K., Harper, D. A. T., Taylor, C. M. & Anderson, L. I. (eds) Silurian fossils of the Pentland Hills, Scotland. Field Guide to Fossils 11, 829. London: The Palaeontological Association.Google Scholar
Dohrmann, M., Vargas, S., Janussen, D., Collins, A. G. & Wörheide, G. 2013. Molecular paleobiology of early-branching animals: integrating DNA and fossils elucidates the evolutionary history of hexactinellid sponges. Paleobiology 39, 95108.Google Scholar
Finks, R. M. & Rigby, J. K. 2004a. Paleozoic demosponges. In Kaesler, R. L. (ed.) Treatise on invertebrate paleontology. Part E, Porifera (revised) 3, 9173. Boulder, CO & Lawrence, KA: Geological Society of America and Paleontological Institute.Google Scholar
Finks, R. M. & Rigby, J. K. 2004b. Paleozoic hexactinellid sponges. In Kaesler, R. L. (ed.) Treatise on invertebrate paleontology. Part E, Porifera (revised) 3, 319448. Boulder, CO & Lawrence, KA: Geological Society of America and Paleontological Institute.Google Scholar
Hall, J. & Clarke, J. M. 1898. A memoir on the palaeozoic reticulate sponges constituting the family dictyospongidae. New York & Albany, NY: Wynkoop Hallenbeck Crawford Co.. 350 pp. +70 pls.Google Scholar
Haswell, G. C. 1865. On the Silurian formation in the Pentland Hills. Edinburgh: Wilson P. Nimmo. 47 pp.Google Scholar
Hinde, G. J. 1883. Catalogue of fossil sponges in the geological department of the British Museum (Natural History), with description of new and little-known species. London: British Museum (Natural History). 248 pp. + 38 pls.Google Scholar
Hinde, G. J. 1887–1912. A monograph of British fossil sponges. Monograph of the Palaeontographical Society (1) 1887: 40(190), 1–92, pls 1–8; (2) 1888: 41(194), 93–188, pl. 9; (3) 1893: 47(222), 189–254, pls 10–19; (4) 1912: 65(322), 255264.Google Scholar
Hinde, G. J. & Holmes, W. M. 1892. On the sponge remains in the Lower Tertiary strata near Oamaru, Otago, New Zealand. Journal of the Linnean Society (London), Zoology 24, 177262.Google Scholar
Howell, H. H. & Geikie, A. 1861. The geology of the neighbourhood of Edinburgh. Memoirs of the Geological Survey of Great Britain. Edinburgh: HMSO. 137 pp.Google Scholar
Lamont, A. 1947. Gala-Tarannon beds in the Pentland Hills, near Edinburgh. Geological Magazine 84, 193208.Google Scholar
MacLaren, C. 1839. A sketch of the geology of Fife and the Lothians, including detailed descriptions of Arthur's Seat and the Pentland Hills. Edinburgh: A. & C. Black. 235 pp.Google Scholar
M'Coy, F. 1846. A synopsis of the Silurian fossils of Ireland collected from the several districts by Richard Griffith F.G.S. Dublin: Privately published. 72 pp+5 pls.Google Scholar
Mehl, D. 1996. Phylogenie und Evolutionsökologie der Hexactinellida (Porifera) im Paläozoikum. Geologische Paläontologische Mitteilungen der Universität Innsbruck, Sonderband 4, 155.Google Scholar
Mehl-Janussen, D. 1999. Die frühe evolution der Porifera. Münchner Geowissenschaftliche Abhandlungen, Reihe A 37, 172.Google Scholar
Muir, L. A., Botting, J. P., Carrera, M. & Beresi, M. 2013. Palaeobiogeography of Cambrian – Silurian Porifera. In Harper, D. A. T. & Servais, T. (eds) Early palaeozoic palaeobiogeography and palaeogeography, 127144. London: Geological Society, Memoirs 38.Google Scholar
Peach, B. N. & Horne, J. 1899. The Silurian rocks of Britain, 1: Scotland. Memoir of the Geological Survey, UK, xviii. 749 pp.Google Scholar
Reed, F. R. C. 1917. The Ordovician and Silurian Brachiopoda of the Girvan District. Transactions of the Royal Society of Edinburgh 51, 795–998, pls 124.Google Scholar
Rigby, J. K. 1986. Sponges of the Burgess Shale (Middle Cambrian) British Columbia. Palaeontographica Canadiana Monograph 2, 1105.Google Scholar
Rigby, J. K. & Webby, B. D. 1988. Late Ordovician sponges from the Malongulli Formation of central New South Wales, Australia. Palaeontographica Americana 56, 1147.Google Scholar
Robertson, G. 1985. Palaeoenvironmental interpretation of the Silurian rocks of the Pentland Hills. Unpublished PhD Thesis, University of Edinburgh, Scotland.Google Scholar
Robertson, G. 1989. A palaeoenvironmental interpretation of the Silurian rocks of the Pentland Hills, near Edinburgh, Scotland. Transactions of the Royal Society of Edinburgh: Earth Sciences 80, 127141.Google Scholar
Schmidt, O. 1870. Grundzüge einer spongien-fauna des atlantischen gebietes. Leipzig: Wilhelm Engelmann, iii–iv, 1–88, pls 16.Google Scholar
Schulze, F. E. 1885. The Hexactinellida. Reports of the Scientific Research of the Voyage of H.M.S. ‘Challenger', 1873–1876. Narrative 1, 437451.Google Scholar
Schulze, F. E. 1886. Über den Bau und das System der Hexactinelliden. Abhandlungen der Königlichen Akademie der Wissenschaften zu Berlin (Physikalisch-Mathematisch Classe). 97 pp.Google Scholar
Tabachnick, K. R. 2002. Family rossellidae schulze, 1885. In Hooper, J. N. A. & Van Soest, R. W. M. (eds) Systema Porifera: a guide to the classification of sponges, 11411505. New York: Kluwer Academic/Plenum Publishers.Google Scholar
Vacelet, J. 1996. Deep-sea sponges in a Mediterranean cave. In Uiblein, F., Ott, J. & Stachowitsch, M. (eds) Deep-sea and extreme shallow-water habitats: affinities and adaptations. Biosystematics and Ecology Series 11, 299312.Google Scholar
Walcott, C. D. 1920. Cambrian geology and palaeontology. IV: middle Cambrian Spongiae. Smithsonian Miscellaneous Collections 67, 261364.Google Scholar