Allosaurus Posted February 17, 2021 Share Posted February 17, 2021 I picked up 3 ammonites last summer and was told they were from England, but with no additional information such as age or locality :(. I'm hoping someone out here might be able to help me ID them to genus or perhaps even have ideas as to where they originate. #1 Link to comment Share on other sites More sharing options...
Allosaurus Posted February 17, 2021 Author Share Posted February 17, 2021 #2 Link to comment Share on other sites More sharing options...
Allosaurus Posted February 17, 2021 Author Share Posted February 17, 2021 #3 Link to comment Share on other sites More sharing options...
Ludwigia Posted February 17, 2021 Share Posted February 17, 2021 Hard to tell without the necessary information. #1 is indecipherable for me. #2 may be Garantiana or another Peresphinctid and #3 perhaps Dorsetensia. But those are both just wild guesses. 1 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
caterpillar Posted February 17, 2021 Share Posted February 17, 2021 The 1 could be an Hildoceras. But as Roger said, difficult to tell without informations http://www.paleotheque.fr Link to comment Share on other sites More sharing options...
Allosaurus Posted February 17, 2021 Author Share Posted February 17, 2021 Thanks everyone. Yeah, I figured it was a long shot, and I appreciate your input. I'll just notate them as unsure with question marks and the possible identifications. Link to comment Share on other sites More sharing options...
dhiggi Posted February 17, 2021 Share Posted February 17, 2021 As mentioned above, number 1 has a few similarities to Hildoceras that we find along the Whitby coast. The matrix is totally different though Link to comment Share on other sites More sharing options...
abyssunder Posted February 17, 2021 Share Posted February 17, 2021 Are you sure they can't be from Madadagascar? " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
Allosaurus Posted February 17, 2021 Author Share Posted February 17, 2021 1 hour ago, abyssunder said: Are you sure they can't be from Madadagascar? I won't say with certain as I didn't collect them, but I would be a little surprised if the locality was incorrect. I've never seen ammonites like these come from Madagascar. Have you see similar ones with a provenance out of Madagascar? Link to comment Share on other sites More sharing options...
fifbrindacier Posted February 18, 2021 Share Posted February 18, 2021 All i can say is that you can write Jurassic for your identifications. And i agree the number two is a perisphinctid. "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
BentonlWalters Posted February 18, 2021 Share Posted February 18, 2021 Just a guess, but the colouring and preservation is very similar to Jurassic ammonites found in Somerset from the Beacon Limestone Formation at places like Kingstone (https://ukfossils.co.uk/2016/06/10/kingstone/) which is Pliensbachian to Toarcian in age. With this in mind the first appears to be Hildoceras sp. and the second probably Dactylioceras sp.. I'm less sure about the third one though. Hopefully this helps. Benton Link to comment Share on other sites More sharing options...
Reconquistador Posted February 25, 2021 Share Posted February 25, 2021 Number 1: I would say, that it is Hildoceras. One can see lateral groove, which is not very common character. Some Hildoceras species are well known for it (other genera which posseses it, like Cleviceras, Parahildaites, Ochetoceras or other looks differently). Tricarinate-bisulcate venter is also well visible. By quadrate whorl section and only weak lateral groove, I would expect it to be Hildoceras lusitanicum. But I am not completelly sure about it. Number 2: This is much harder. It looks like Dactylioceras (Dactylioceras). And it not only looks like that, but as preservation is similar to the first one, they may come from the same locality and age and these genera occured together. I do not know how to identify species of this genus (with few exceptions), but this one is certainly not D. (D). praepositum, D. (D.) holandrei, or D. (D.) athleticum. It is quite similar to D. (D.) commune (which is quite common species as its name suggests) and many collectors would name it as such, but it could also be something different. Number 3: If it comes from the same locality and age, then it should be some Harpoceratinae indet. Link to comment Share on other sites More sharing options...
IsaacTheFossilMan Posted February 25, 2021 Share Posted February 25, 2021 I can't help with ID, but, if they're from the UK, they'll be Jurassic. ~ Isaac; www.isaactfm.com "Don't move! He can't see us if we don't move!" - Alan Grant Come to the spring that is The Fossil Forum, where the stream of warmth and knowledge never runs dry. Link to comment Share on other sites More sharing options...
Notidanodon Posted February 25, 2021 Share Posted February 25, 2021 They look like they are from the beacon limestone fm. Of somerset, I can’t think of another formation With that preservation, if so the species would 1.hildoceras 2.dactylocerous 3. harpoceras Link to comment Share on other sites More sharing options...
Reconquistador Posted February 26, 2021 Share Posted February 26, 2021 Harpoceras is highly probable. Sadly, ribs are poorly visible, but they seems to be falcate. If so, it is Harpoceras. If they are only falcoid, it can also be Cleviceras, but falcoid ribs are not excluding possibility of it being some species of Harpoceras. For Cleviceras, it also seems to be quite too evolute, but it might be still on the margin of possible variability of this genus. Comparison of falcoid and falcate ribs on Wikimedia Commons (my work) Link to comment Share on other sites More sharing options...
Kosmoceras Posted February 26, 2021 Share Posted February 26, 2021 No doubt these are from Beacon Limestone Formation around Ilminster. 15 hours ago, IsaacTheFossilMan said: I can't help with ID, but, if they're from the UK, they'll be Jurassic. We do have Cretaceous ammonites in the UK too! Link to comment Share on other sites More sharing options...
IsaacTheFossilMan Posted February 26, 2021 Share Posted February 26, 2021 2 minutes ago, Kosmoceras said: We do have Cretaceous ammonites in the UK too! Yes, but the preservation lends itself to Jurassic. ~ Isaac; www.isaactfm.com "Don't move! He can't see us if we don't move!" - Alan Grant Come to the spring that is The Fossil Forum, where the stream of warmth and knowledge never runs dry. Link to comment Share on other sites More sharing options...
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