| 2004 Denver Annual Meeting (November 7–10, 2004) | |
| Paper No. 226-13 | |
| Presentation Time: 4:45 PM-5:00 PM | ||
A SILURIAN SEA SPIDER | ||
|
SIVETER, Derek J.1, SUTTON, Mark D.1, BRIGGS, Derek E.G.2, and SIVETER, David J.3, (1) Department of Earth Sciences, Univ of Oxford, Parks Road, Oxford, OX1 3PR, derek.siveter@earth.ox.ac.uk, (2) Department of Geology and Geophysics, Univ of Yale, P.O. Box 208109, New Haven, CT06520-8109, (3) Department of Geology, Univ of Leicester, University Road, Leicester, LE1 7RH The Herefordshire (Silurian) Konservat-Lagerstätte in England yields remarkable, three-dimensional, non-biomineralized fossils in carbonate concretions hosted in a volcaniclastic deposit. Pycnogonids (sea spiders) have an extremely sparse fossil record, and are known globally from just four species based on a few tens of specimens from two localities. A new, exceptionally preserved sea spider from the Herefordshire deposit represents the oldest known adult by some 35 million years, the most completely known fossil species, and provides new insight into the early morphology of the Pycnogonida and its relationship to other arthropod groups. The morphology of this recently discovered form has been digitally reconstructed to produce a ‘virtual fossil’ in the round. | ||
|
2004 Denver Annual Meeting (November 7–10, 2004)
General Information for this Meeting | ||
| Session No. 226 Paleontology XI: Species Concepts and Phylogenetic Relationships Colorado Convention Center: 104/106 1:30 PM-5:30 PM, Wednesday, November 10, 2004 Geological Society of America Abstracts with Programs, Vol. 36, No. 5, p. 525 | ||
© Copyright 2004 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions. | ||