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Showing results for tags 'posidonienschiefer'.
Oxytropidoceras posted a topic in Fossil NewsVampire squid ancestor died in 'eternal embrace' with its dinner The Jurassic predator and prey suffocated together underwater https://www.livescience.com/jurassic-predator-prey-suffocated.html https://unfoldtimes.com/vampire-squid-ancestor-died-in-eternal-embrace-with-its-dinner/ The open access paper is: Klug, C., Schweigert, G., Fuchs, D. and De Baets, K., 2021. Distraction sinking and fossilized coleoid predatory behaviour from the German Early Jurassic. Swiss Journal of Palaeontology, 140(1), pp.1-12. https://sjpp.springeropen.co
A lovely 18" belemnite slab I've bought for my birthday (birthday belemnites are a bit of a tradition!). From the Jurassic Posidonienschiefer (Toarcian, Upper Lias) of Holzmaden - a very interesting and unusual selection of mostly the same species, one with a nice epirostrum. Not quite sure of the actual species, but it's close to Acrocoelites subtenuis and A. gracilis - neither of which usually have epirostra (the squashed bit at the tip of photo 2). It also contains a couple of bonus teeth including a Hybodus type which Sebastian @belemniten tells me is a rarity there. Ap
TqB posted a topic in Questions & AnswersI've just purchased a fine slab of belemnites from Holzmaden and the stratigraphy is given as Posidonienschifer, Lias epsilon II-102. I know that epsilon is Lower Toarcian but please could anyone enlighten me about the II-102? I particularly want to correlate this accurately with Yorkshire, if possible! @belemniten ? EDIT: I've just checked the seller's other material and one that I'd expect to be from the same beds is given as "II-12" - so @oilshale is almost certainly right with his answer below, and it see
TqB posted a topic in Member CollectionsExtremely rare, I never thought I'd get the chance to acquire one of these so I was very pleased when one came up for sale. Chitinobelus acifer Fischer 1981, a belemnite (or possibly belemnotheutid) whose rostrum was originally composed of aragonite with organic material. As a result, it's preserved as a compressed organic film with the aragonite lost to diagenesis. Belemnites are nearly always mostly calcite (largely thought to be primary) and preserve 3D in all sorts of rock. There is argument (quite complex) over whether this is an unusual aragonitic belemn