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Showing results for tags 'counterpart'.
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When faced with a radiodont appendage fossil; How does one effectively determine which slab contains the "part" or "counterpart" ? For reference, here's the holotype Pseudoangustidontus appendage. The first pic, Figure A, is apparently the positive(?) "part" of the fossil. Whilst the second pic, Figure C, is apparently the negative(?) "counterpart". Like it's easy to tell the difference between an impression/cast, or the actual fossilised remains for hard-bodied specimens like shells, exoskeletons and bone. But for some soft-bodied organisms, it's especially difficult when both slabs seem to preserve both the impressions and the fossilised remains of the organism, as in the case with the Pseudoangustidontus holotype. I've also heard that concavity of the matrix usually helps in identification; but thin and soft-bodied specimens often just leaves a planar imprint, so judging by relief might not be too reliable either. Any thoughts on this matter?
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- anomalocaridid
- anomalocaris
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This fossil and counterpart was for sale at a mineral, fossil and gem fair celebrated in my city some days ago. It's a katydid probably from the extinct family Prophalangopsidae that have some similar species. Colour of wings has been preserved and it had dark blotches in them. It comes from Liaoning (China) and I think it's middle Jurassic. Any idea about the species? Thanks!
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- counterpart
- jurassic
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