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Post by pleecan (Peter Lee) on May 9, 2014 6:54:10 GMT -5
 Approx 1-1.5mm width. Williamsville Formation Bertie Group. |
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Post by Joe Botting on May 9, 2014 10:24:14 GMT -5
Well, well, well. That there do be a sponge, Peter. On the zoomed view, you can see spicules all over the place, including tiny monaxons projecting from the margin at a high angle (especially in the lower part), and some more robust ones that are roughly branch-parallel. Is this a close up of a previous specimen, or a new find? Really good clear photo, too - well done.  |
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Post by ammocarbsteve on May 10, 2014 2:17:34 GMT -5
Peter.... Congratulations and nice find...
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Post by Joe Botting on May 10, 2014 4:05:29 GMT -5
Just a follow-up: it seems to be something very like Arborispongia delicatula (Carboniferous of Bear Gulch, Montana) - may well be a different species of the same genus. Finks & Rigby (2004) put it in the Halichondritidae, which may actually be about right when you consider the structural features... although it would have to be rather derived.
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Post by Joe Botting on May 10, 2014 6:57:20 GMT -5
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Post by pleecan (Peter Lee) on May 12, 2014 5:05:58 GMT -5
A sponge!!!  Thanks Joe for the proper id ! Thanks Steve! Here are a few more pic    |
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Post by pleecan (Peter Lee) on May 12, 2014 5:29:53 GMT -5
The specimen was found in a discarded pile .... thrown out. more pics    |
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Post by pleecan (Peter Lee) on May 12, 2014 5:31:57 GMT -5
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Post by pleecan (Peter Lee) on May 12, 2014 5:34:09 GMT -5
The above was imaged under a film of water to bring out details.
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Post by pleecan (Peter Lee) on May 12, 2014 5:46:36 GMT -5
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Post by Joe Botting on May 12, 2014 5:51:10 GMT -5
Some very nice details here, Peter - I hadn't realised there was so much of it. I would think that specimen should be describable, if you're interested... Arborispongia pleecani has a nice ring to it. |
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Post by pleecan (Peter Lee) on May 12, 2014 5:54:31 GMT -5
Yes it does have a nice ring Joe.... Let me know if you want close ups with scale etc and any other views  |
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Thanks Joe for the proper id !
