Pterygotus Posted February 22, 2019 Share Posted February 22, 2019 I recently saw this spinosaurus aegypticus maxilla for sale from the Kem Kem sequence. It measures 4 cm. Is it real and could it be a misidentified crocodile maxilla? Link to comment Share on other sites More sharing options...
indominus rex Posted February 22, 2019 Share Posted February 22, 2019 The tooth is most certainly placed in, Im not too good with identifying jaw pieces so I will let some of the more experienced members like @Troodon or @LordTrilobite. Regards, indominus rex 2 Life started in the ocean. And so did my interest in fossils. Link to comment Share on other sites More sharing options...
gigantoraptor Posted February 22, 2019 Share Posted February 22, 2019 Agree with Indominus rex, the tooth looks like it was placed in a piece of jaw (might be from a crocodile but would like more pictures) The tooth is from a Spinosaurid but can't be identified on genus level. It's either from Sigilmassasaurus brevicollis or Spinosaurus aegyptiacus. 2 Link to comment Share on other sites More sharing options...
Troodon Posted February 22, 2019 Share Posted February 22, 2019 Nothing in that jaw fragment suggest it being from a Spinosaurid. Like most being sold the tooth was placed in that jaw has others have said. 2 Link to comment Share on other sites More sharing options...
Pterygotus Posted February 22, 2019 Author Share Posted February 22, 2019 6 hours ago, Troodon said: Nothing in that jaw fragment suggest it being from a Spinosaurid. Like most being sold the tooth was placed in that jaw has others have said. Would this one be real? Link to comment Share on other sites More sharing options...
Troodon Posted February 22, 2019 Share Posted February 22, 2019 Jaw bone is real but teeth are placed. Dont get fooled that someone had original functional teeth in a Spinosaurid jaw. Might have some resto on the front end. 1 Link to comment Share on other sites More sharing options...
Abstraktum Posted February 22, 2019 Share Posted February 22, 2019 While we're at the topic: Are there genuine pieces of jaw material with tooth in it? As I understand it correctly there where two tooth attached to the Jaw of the now lost Holotype of Spinosaurus. Regarding Spinosaurus, but also more in general to any Dinosaur jaw material. Is a genuine Dino Jaw with teeth that special? Link to comment Share on other sites More sharing options...
gigantoraptor Posted February 22, 2019 Share Posted February 22, 2019 Dinosaur jaws in general are rare, but I've seen quite a bit dinosaur jaws with teeth in it (mostly from pictures). The material from the Kem Kem beds is just normally not articulated. I don't have seen any Spinosaurid jaws from here with the teeth still present, but Troodon will have seen a whole lot more of these jaws in his life. The holotype of Spinosaurus aegyptiacus had 20 teeth I think. Some examples below: Patagosaurus fariasi, Chubut province, Argentina Brachylophosaurus Jaw 2 Link to comment Share on other sites More sharing options...
LordTrilobite Posted February 22, 2019 Share Posted February 22, 2019 8 hours ago, Pterygotus said: I recently saw this spinosaurus aegypticus maxilla for sale from the Kem Kem sequence. It measures 4 cm. Is it real and could it be a misidentified crocodile maxilla? Stay away from that one. As Troodon pointed out, there's nothing to indicate it's part of a Spinosaurid jaw. Nearly all "Spinosaurid" jaws on the market are composites. The jaw pieces that I've seen that haven't been tampered with can be counted on one hand and most of them were premaxilla pieces with replacement teeth still in place. But as a rule, when you see a "Spinosaurid" jaw for sale, the teeth are very likely placed in there because it sells better. 58 minutes ago, Pterygotus said: Would this one be real? Much better than the previous one. Definitely the front of a Spinosaurid left dentary. But yeah, the teeth are placed in as is to be expected. 21 minutes ago, gigantoraptor said: Dinosaur jaws in general are rare, but I've seen quite a bit dinosaur jaws with teeth in it (mostly from pictures). The material from the Kem Kem beds is just normally not articulated. I don't have seen any Spinosaurid jaws from here with the teeth still present, but Troodon will have seen a whole lot more of these jaws in his life. The holotype of Spinosaurus aegyptiacus had 20 teeth I think. I don't think jaws are actually that rare in Kem Kem. I think it's just that the demand is very high. In general Spinosaur material is quite common, even dinosaur skull material seems fairly common. Though I do see much more croc jaw material on the market than Spinosaurid. Though jaw material with original teeth in them is quite rare. 1 Olof Moleman AKA Lord Trilobite Link to comment Share on other sites More sharing options...
Haravex Posted February 23, 2019 Share Posted February 23, 2019 Just going to give my thoughts on this. 1. possible jaw bone of an animal from the kem kem beds more than likely Aoufous formation, individual tooth placed 2 yes real dentary, however I would ask around first before committing to this piece as I have seen nicer pieces from the Tuscon fossil show in relative terms of cost to quality. 3 jaw and skull bones are still rare from the kem kem beds dont be fooled what makes them appear more abundant is that both miners sellers and buyers can easily identify a piece of dentary or maxilla, and both sides know there is more money in a piece likes this. Link to comment Share on other sites More sharing options...
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