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Topics - DaveGodfrey
I've had to update to windows 10 on my phone as messenger stopped working with the new changes to the Facebook app. And now TR looks like this and I can't work out why. It doesn't seem to be the text size settings in "Edge" and it doesn't seem to be the settings for the whole phone either.
I are confused.
I are confused.
The biggest family tree of dinosaurs mapped out so far suggests that the origin of dinosaurs may have been 20 million years earlier than previously thought - and could have meant they survived the mass extinction widely thought to have wiped them out.
]They can't even English properly.
Uh? So dinosaurs were thought to have died out before they evolved? You wot?
Anyway, for those of you who are interested in what the Mail put through the chipper the actual paper is here.
Not sure how long they'll be available for, but David Attenborough's got another 2-part Aquatic Ape Hypothesis radio show as a follow-up to the one he did 12 years ago.
Sansom, R., 2016, Preservation and phylogeny of Cambrian ecdysozoans tested by experimental decay of Priapulus Scientific Reports 6, Article number: 32817.
The exceptionally preserved Cambrian fossil record provides unique insight into the early evolutionary history of animals. Understanding of the mechanisms of exceptional soft tissue preservation frames all interpretations of the fauna and its evolutionary significance. This is especially true for recent interpretations of preserved nervous tissues in fossil ecdysozoans. However, models of soft tissue preservation lack empirical support from actualistic studies. Here experimental decay of the priapulid Priapulus reveal consistent bias towards rapid loss of internal non-cuticular anatomy compared with recalcitrant cuticular anatomy. This is consistent with models of Burgess Shale-type preservation and indicates that internal tissues are unlikely to be preserved with fidelity if organically preserved. This pattern, along with extreme body margin distortion, is consistent with onychophoran decay, and is therefore resolved as general for early ecdysozoans. Application of these patterns to phylogenetic data finds scalidophoran taxa to be very sensitive to taphonomically informed character coding, but not panarthropodan taxa. Priapulid decay also have unexpected relevance for interpretation of myomeres in fossil chordates. The decay data presented serve not only as a test of models of preservation but also a framework with which to interpret ecdysozoan fossil anatomies, and the subsequent evolutionary inferences drawn from them.