Synziphosurines (Xiphosura: Chelicerata) from the Silurian of Iowa

Rachel A. Moore; Derek E. G. Briggs; Simon J. Braddy; Jeffrey W. Shultz

doi:10.1666/10-057.1

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Rachel A. Moore,¹ Derek E. G. Briggs,² Simon J. Braddy,¹ Jeffrey W. Shultz³

¹Department of Earth Sciences, University of Bristol, Wills Memorial Building, Queen's Road, Bristol BS8 1RJ, UK
²Department of Geology and Geophysics, and Peabody Museum of Natural History, Yale University, P.O. Box 208109, New Haven, Connecticut 06520-8109, USA
³Department of Entomology, University of Maryland, College Park, Maryland 20742, USA

Abstract

A new genus and species of synziphosurine (Chelicerata) is described from the Silurian (Wenlock) Scotch Grove Formation Konservat-Lagerstätte in Clinton County, Iowa. Camanchia grovensis n. gen. n. sp. is characterized by a sub-triangular carapace, ten opisthosomal segments divided into a preabdomen of seven and a postabdomen of three, and a tuberculate ornament on the carapace and pleural margins. A single new specimen from the same location is assigned to Venustulus waukeshaensis, originally described from the Late Llandovery Waukesha Konservat-Lagerstätte of Wisconsin. A comparison of the musculature of C. grovensis with that of living Limulus polyphemus and the Jurassic Mesolimulus walchi from Nusplingen, Germany shows that it is much simpler, consistent with the status of synziphosurines as stem xiphosurids.

Citation Download Citation

Rachel A. Moore, Derek E. G. Briggs, Simon J. Braddy, and Jeffrey W. Shultz "Synziphosurines (Xiphosura: Chelicerata) from the Silurian of Iowa," Journal of Paleontology 85(1), 83-91, (1 January 2011). https://doi.org/10.1666/10-057.1

Accepted: 1 July 2010; Published: 1 January 2011

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