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Hi all, I recently bought this partial theropod tooth form the Lourinha Formation (Portugal). Height ~1.1 cm. The distal serration density is 8-8.5/5 mm, the mesial serration density is 7.5-9/5 mm. Crown ornamentations are present and I think also interdenticular sulci. I looked at an old post of Troodon (see below). Are there any other known theropods from this location, besides Torvosaurus, that have a crown serration density < 9/5mm? Any thoughts?
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Possible Lourinha Portugal Marshosaurus-like Megalosaurid Tooth
Kikokuryu posted a topic in Fossil ID
I recently purchased a Theropoda indet. tooth from the Lourinhã Formation of Lourinhã, Portugal. I wasn't expecting much initially since it looked like an incomplete tooth and the seller tends to go the safe route with their IDs if it's too vague. But, the serration count was similar to that of the Marshosaurus-like megalosaurid teeth based on @Troodon's guide on the dinosaurs of Portugal. Maybe it's just wishful thinking, but I wanted to see if anyone else had some input before I slap that good old theropoda indet. label on the display. The distal serrations is split down the middle. Mesial serrations were kind of hard to count, but they are at least 20/5mm, the distal serrations are 16/5mm. Not sure if the split serrations are messing with the count, but it should be around that 16/5mm after counting it multiple times with various pictures. I don't know how much further the tooth would have gone had it been complete, but I think the mesial serrations do appear to end before reaching the base. Although I don't know if those serration densities still overlap with other theropods like Allosaurus. Split distal serrations and shape of the base which could be slightly off due to the split serration. Distal serrations. Mesial serrations. Mesial serrations ending? Close up on denticle shape on distal side.- 7 replies
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Hi, I have another query about a possible theropod bone, this time it is from the Lourinha Formation in Portugal. I think it is a caudal and the seller lists it as a Theropod indet fossil but I wanted to confirm if it is indeed from a Theropod because it does look a bit similar to some croc verts I have seen. The fossil is 5.3cm in length. Thanks.
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Hi, I’m thinking of getting these teeth and wondering if anyone can help on the ID, there both from the Lourinhä Formation, Portugal. Sorry I can’t get the sellers website out at the bottom. Thank you!
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Paper describes a largely complete specimen of Miragaia longicollum discovered in 1959 in Atouguia da Baleia, Peniche, Portugal, consisting of both anterior and posterior portions of the skeleton. https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0224263
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A new macronarian sauropod from the Upper Jurassic of Portugal Oceanotitan dantasi . Unfortunately no teeth were described as part of this discovery. Paywalled https://www.tandfonline.com/doi/full/10.1080/02724634.2019.1578782#.XNwhnRbxWYE.twitter A new macronarian sauropod from the Upper Jurassic of Portugal Pedro Mocho ,Rafael Royo-Torres &Francisco Ortega Article: e1578782 | Received 15 Dec 2016, Accepted 10 Jan 2019, Published online: 15 May 201 https://doi.org/10.1080/02724634.2019.1578782
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Hi all, I have a tricky tooth ID question. For now it is labeled as Theropod indet. and I guess this is as far as it gets, but I just want to check if someone else gets a Dromaeosaurid vibe =) It was found in the Lourinhã Formation. Crown height is 6mm. Denticles per 1mm are 9 mesial and 7 distal. Mesial denticles are also much shorter, and the mesial carina ends at about half way from the anterior of the tooth (maybe 2/3 considering the tip is missing). Distal denticles are slightly hooked towards the anterior. I went through quite some papers from similar aged formations in Portugal/Spain and Morrison formation but without any real luck: Zinke 1998 describes possible Dromaeosaurid teeth that might fit the bill regarding denticle density and roughly TCH/FABL/BW when scaled to this tooth (6.09mm/3.61mm/1.95mm). Any help is highly appreciated!
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Occasionally we see dinosaur material from Portugal for sale, mostly theropod teeth, but I post this because the dinosaurs of the Lourinhã Group are very interesting to those of us that are familiar with the Morrison Formation. Information here may help us identify teeth from the Morisson From an abstract: The Lourinhã and Alcobaça formations (in Portugal), Morrison Formation (in North America) an Tendaguru Beds (in Tanzania) can be compared. These three Late Jurassic areas, dated as Kimmeridgian to Tithonian are similar paleoenvironmentally and faunally. Four dinosaur genera are shared between Portugal and the Morrison (Allosaurus, Torvosaurus, Ceratosaurus and Apatosaurus), as well as all non-avian dinosaur families. Late Jurassic Map Portugal has a high diversity of dinosaurs. The Lourinhã Formation is the most notable unit of the group not only noted for teeth & bones but eggs and trackways. The Alcobaça Formation is also included in the group. Here is a geologic look at westcentral Portugal. The coastline is absolutly beautiful and a challenge to collect. Teeth, tracks and bones are typically found in the boulders making extraction a nightmare. Lourhina Fm.pdf
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