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Showing results for tags 'anguloserra'.
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Goniodonts - strange echinozoan teeth from the Carboniferous
TqB posted a topic in Member Collections
I was surprised to see this specimen for auction and pleased to win it. It's Anguloserra thomasi, a rare tooth from an ophiocistioid echinoderm and comes from the same locality as the holotype described here (abstract only): Haude & Langenstrassen 1976. I've been interested in these since finding three similar specimens in the UK that took a while to identify - shown in the next post. It's preserved as an impression - most material in this matrix is decalcified. Carboniferous, upper Mississippian, Culm beds (equivalent of Brigantian and Arnsbergian beds in UK), Aprath, Germany. Scale in mm. Here's the holotype from the linked paper (a latex cast):- 21 replies
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Very rare weird echinoderm goniodont/tooth Mississippian UK,
TqB posted a topic in Member Collections
Anguloserra sp. Brigantian (Mississippian) marine shale, Co. Durham, UK. I was scanning a lovely hash plate of bryozoan and Archaeocidaris bits under a binocular microscope when this odd but very distinctive piece leapt out at me. They don't seem to have been recorded from the UK Carboniferous but I had found one a few years ago at the same locality and it took ages to track down an ID. It's two overlapping goniodonts or teeth from an ophiocistioid. This is a group of strange Palaeozoic echinoderms known largely from their tooth elements which form overlapping ranks, a good overview is here: http://echinoblog.blogspot.co.uk/2012/08/ophiocistioids-weird-mystery-fossils.html (One like this is pictured about halfway down). Hash plate jumble, the goniodont pair is arrowed. Brass scale is 1cm. Overlapping pair of goniodonts pointing downwards, next to a couple of Archaeocidaris spines. Closeup:- 16 replies
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