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Showing results for tags 'megateuthis'.
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From the album: Belemnites
This rostrum measures 38cm., although it is not quite complete, so it could have been up to 50cm. long originally. The name of the species used to be M.gigantea until it was revised a few years ago, which I find to be more suitable for this behemoth, the largest belemnite ever. It originates from the Bajocium in the Wutach Valley, southwestern Germany. -
A perfect gift I reckon - I won this on the usual auction site a couple of weeks ago and was allowed to unwrap it today. It's a 22", 3.3lb Megateuthis suevica (formerly gigantea). (They do get longer, supposedly well over 30", even a yard. One day...) It's now probably the star attraction of my belemnite collection (roughly a thousand specimens). I have collected the same species in the UK but I've not heard of any reaching this sort of size here, about 14" being the maximum I know of. My longest Yorkshire coast one, 10", is shown in photo 3. Middle Jurassic, Bajocian, reportedly from the Subfurcatum Zone (they're usually Humphriesianum, the zone below), temporary roadworks near Osnabrück, N. Germany, 1985. With 10" Yorkshire, UK specimen from the Scarborough Formation.
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Someone told me recently about a temporary construction site in the Wutach area, so I decided to go have a look during the cooler evening hours on Tuesday. They were putting in some drainage pipes and were just about finished, but there was still a 20-meter stretch of ditch left to check out. I was hoping for some decent ammonite fauna, but the layer at the top which had the best potential was too weathered to give up anything much of interest. At least I found some pieces of Spiroceras heteromorph ammonites, so I knew that I was digging at the base of the upper Bajocian in the niortense zone. There was also a small concretion with little Garantiana sp. ammos along with some tiny bivalves. The best finds, however were lower down in the mudstone horizons where I came up with a Megateuthis gigantea belemnite (17cm.) and a Modiolus bipartitus bivalve.
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- bajocian
- megateuthis
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The phragmocone is partly in a nodule, the rostrum protruding from it - quite rare in these beds. It has the remains of an epirostrum. Assigned to Megateuthis in: Doyle, P. 1990-92 The British Toacian (Lower Jurassic) Belemnites. Monograph of the Palaeontographical Society, London: Part 2, 50-79, pls.18-28 (Publ. No. 587, vol. 145 Contentious taxonomy down the years - diagnostic features include the pair of dorsolateral apical grooves. Similar specimens of Acrocoelites sp. are supposed to have an additional ventral groove but this is variable ...
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- acrocoelites
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