Guest Nicholas Posted February 7, 2009 Share Posted February 7, 2009 ScienceDaily (Feb. 6, 2009) — A missing link in the evolution of the front claw of living scorpions and horseshoe crabs was identified with the discovery of a 390 million-year-old fossil by researchers at Yale and the University of Bonn, Germany. Find the article HERE! Link to comment Share on other sites More sharing options...
Auspex Posted February 8, 2009 Share Posted February 8, 2009 "Sadly, the quarry from which this fabulous material comes has closed for economic reasons, so the only additional specimens that are going to appear now are items that are already in collectors' hands and that may not have been fully prepared or realized for what they are" Have you hugged an amateur collector lately? "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
Guest Nicholas Posted February 8, 2009 Share Posted February 8, 2009 "Sadly, the quarry from which this fabulous material comes has closed for economic reasons, so the only additional specimens that are going to appear now are items that are already in collectors' hands and that may not have been fully prepared or realized for what they are"Have you hugged an amateur collector lately? This struck me as odd, I'm sure amateurs would come in droves and pay to access the site.. Link to comment Share on other sites More sharing options...
Guest Nicholas Posted February 8, 2009 Share Posted February 8, 2009 More info and pictures: Find National Geographic's take HERE! Link to comment Share on other sites More sharing options...
Guest solius symbiosus Posted February 11, 2009 Share Posted February 11, 2009 Curiously, the articles seem to "gloss" over the fact that this find extends the range of anomalocarids into the Devonian, and that this fossil seems to indicate that anomalocarids are paraphyletic to all arthropods; that is a significant discovery. The abstract: A Great-Appendage Arthropod with a Radial Mouth from the Lower Devonian Hunsrück Slate, Germany Gabriele Kühl,1 Derek E. G. Briggs,2 Jes Rust1 Great-appendage arthropods, characterized by a highly modified anterior limb, were previously unknown after the Middle Cambrian. One fossil from the Lower Devonian Hunsrück Slate, Germany, extends the stratigraphic range of these arthropods by 100 million years. Schinderhannes bartelsi shows an unusual combination of anomalocaridid and euarthropod characters, including a highly specialized swimming appendage. A cladistic analysis indicates that the new taxon is basal to crown-group euarthropods and that the great-appendage arthropods are paraphyletic. This new fossil shows that features of the anomalocaridids, including the multisegmented raptorial appendage and circular plated mouth, persisted long after the initial radiation of the euarthropods. Holotype of Schinderhannes bartelsi. (A) Ventral. (B ) Interpretative drawing of ventral side. l, left; r, right; A1, great appendage; A2, flaplike appendage; sp, spine; fm, flap margin; te, tergite; ta, trunk appendage. © Partly exposed dorsal side, horizontally mirrored. (D) Interpretative drawing of dorsal side. (E) Interpretative drawing of great appendages, combining information from the dorsal and ventral sides. (F) Radiograph. (G) Reconstruction. Scale bar, 10 mm [for (A) to (G)]. (H) Mouth-part. Scale bar, 5 mm. http://www.sciencemag.org/cgi/content/abstract/323/5915/771 Link to comment Share on other sites More sharing options...
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