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Showing results for tags 'girtyoceras'.
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I recently found this rather good (for the area) and rare goniatite, probably Girtyoceras sp. The innermost half of the living chamber has a mass of small rods which a few knowledgeable friends have suggested are faecal pellets from something that took up residence. It's in an ironstone nodule from a Brigantian (U. Mississippian) shale in Co. Durham, N.E. England. Fairly shallow water, with a diverse fauna of brachiopods, bivalves, bryozoa, small corals, crinoids etc., often broken up. I haven't seen any arthropods apart from small Paladin trilobites which are quite common. At first I thought they were iron mineral alteration structures (e.g. goethite) but I can't see any in other similarly preserved specimens from the same locality and I was quickly persuaded by the pellets idea. I'd be grateful for any suggestions or similar examples. Scale in mm Inside venter Other side - none visible here.
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This was found in central Texas near some ammonites. The appearance is very different than the others. Does anyone know what this might be?
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- goniatite
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