CamilleMD Posted April 24, 2015 Share Posted April 24, 2015 hi ! i am new to this forum and i want to know more about two ammonite fossiles that i own. i was wondering if someone could help me. i don't know what to look for and what are the important characteristics for ammonite identification. i don't know if it's possible to identifiy them to the species but if not, juste to know more about them would be awesome. The first is from Madagascar. Details : The second is from Peru Details : Link to comment Share on other sites More sharing options...
Darktooth Posted April 24, 2015 Share Posted April 24, 2015 Nice sppecimens! But sorry i cant id them. I like Trilo-butts and I cannot lie. Link to comment Share on other sites More sharing options...
abyssunder Posted April 25, 2015 Share Posted April 25, 2015 (edited) For the second one a good match I think could be Tissotia sp. from Upper Cretaceous of Peru. https://www.google.com/search?q=tissotia&biw=1360&bih=612&tbm=isch&tbo=u&source=univ&sa=X&ei=hEg7VbKWOs_lapedgPgE&ved=0CBwQsAQ#imgrc=KRmgs2CbxJksqM%253A%3BFYqZmuQfED15MM%3Bhttps%253A%252F%252Fgeocollect.files.wordpress.com%252F2012%252F04%252Ffossiloftheday-peru-31.jpg%3Bhttps%253A%252F%252Fgeocollect.wordpress.com%252Ftag%252Fshells%252F%3B1600%3B1200 Edited April 25, 2015 by abyssunder " 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...
CamilleMD Posted April 25, 2015 Author Share Posted April 25, 2015 Nice sppecimens! But sorry i cant id them. Ideed they are very pretty ! For the second one a good match I think could be Tissotia sp. from Upper Cretaceous of Peru. Thank you very much for you info , It certanly look like a good match! The sutures on the shell looks identical. Link to comment Share on other sites More sharing options...
CamilleMD Posted April 25, 2015 Author Share Posted April 25, 2015 (edited) For the Madagascar one, could it be Phylloceras sp. or Cleoniceras sp. ? Edited April 25, 2015 by CamilleMD Link to comment Share on other sites More sharing options...
abyssunder Posted April 25, 2015 Share Posted April 25, 2015 The first one,from Madagascar,could be Phylloceras sp.,but I`m not sure. " 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...
CamilleMD Posted April 25, 2015 Author Share Posted April 25, 2015 (edited) Here are more detailed pictures of the Madagascar specimen. Hope this will help the identification Edited April 25, 2015 by CamilleMD Link to comment Share on other sites More sharing options...
CamilleMD Posted April 26, 2015 Author Share Posted April 26, 2015 This is very confusing, I'm finding a lot of images of ammonite from madagascar that are identical to my specimen that are supposed to be Phylloceras sp. and that are suppoed to be Cleoniceras sp ... https://www.google.ca/search?q=Phylloceras&source=lnms&tbm=isch&sa=X&ei=3Cg8VcmzNcvZsASupYHADQ&ved=0CAcQ_AUoAQ&biw=1920&bih=955#imgdii=N6gxIgbhT29OBM%3A%3BN6gxIgbhT29OBM%3A%3Bwvtrj6Ws3wLS2M%3A&imgrc=N6gxIgbhT29OBM%253A%3BDfE0zmRFm7jHwM%3Bhttp%253A%252F%252Fwww.paleobusiness.com%252Fstore%252Ffossili%252Fcefalopodi%252Fammonoidi%252Fvetrina%252Famma45%252FPhylloceras%252520sp.%2525201%2525201920.jpg%3Bhttp%253A%252F%252Fwww.paleobusiness.com%252Fstore%252Ffossili%252Fcefalopodi%252Fammonoidi%252Fvetrina%252Famma45%252Findex.html%3B1920%3B1280 https://www.google.ca/search?q=Cleoniceras&source=lnms&tbm=isch&sa=X&ei=nig8VaXFC_eJsQT3rYGQBg&ved=0CAcQ_AUoAQ&biw=1920&bih=955#imgrc=2hrueyYxLS0-fM%253A%3BupV2h8-sU_tRRM%3Bhttp%253A%252F%252Fwww.trilobita.de%252Fgallery%252Fothers%252Fcleoniceras1%252Fcleoniceras3.jpg%3Bhttp%253A%252F%252Fwww.trilobita.de%252Fgallery%252Fothers%252Fcleoniceras1%252Fcleoniceras3.htm%3B640%3B480 Link to comment Share on other sites More sharing options...
Dino Deals UK Posted April 26, 2015 Share Posted April 26, 2015 In my opinion, the Madagascar specimen is a Cleoniceras. While the differences are subtle between that genus and Phylloceras, I've often found Phylloceras has a signicantly wider "entry chamber" in comparison to the rest of the spiral. Cleoniceras is a more gradual widening towards the end, producing more of an overall neater circle look. Link to comment Share on other sites More sharing options...
Ludwigia Posted April 26, 2015 Share Posted April 26, 2015 I'd also say that it's Cleoniceras. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Bathollovian Posted April 27, 2015 Share Posted April 27, 2015 The Phylloceratids don't have this kind of sutural lines it is not a Phylloceras Regards, Bathollovian Link to comment Share on other sites More sharing options...
CamilleMD Posted April 30, 2015 Author Share Posted April 30, 2015 Thanks a lot for all your help ! Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now