alopias Posted March 21, 2011 Share Posted March 21, 2011 the big shark teeth are popular on the forum , but I will you show my tiny ray teeth ; they are interesting and beautiful . I collect the material with on sieve very small holes ; this species are common in the layer Rhynchobatus pristinus ,size : 3mm middle Miocene Loupian France Dasyatis serralheiroi , size : 3mm male and female (Sexual Dental Heterodonty) more in the future Link to comment Share on other sites More sharing options...
Tony Eaton Posted March 22, 2011 Share Posted March 22, 2011 Very nice pictures! How many liters of material does it take to find those? Link to comment Share on other sites More sharing options...
siteseer Posted March 22, 2011 Share Posted March 22, 2011 Alopias, Great photography. In the Sharktooth Hill Bonebed (Bakersfield area, CA), I have screened at sites where the matrix breaks up into silt particles in water. I have found Dasyatis teeth as small as 2mm (high or wide) and Rhinobatos (or related guitarfish) down to just under 1mm. Less common are Gymnura and rare are Raja. I have found 2-3 Gymnura but not a Raja yet. However, I have a quantity of concentrate (matrix that has been screened to wash out the silt, leaving mostly teeth and tiny fossil fragments) to sort when I have some time. What kind of camera do you use? Jess the big shark teeth are popular on the forum but I will you show my tiny ray teeth; they are interesting and beautiful. I collect the material with a sieve - very small holes; this species are common in the layer - more in the future Link to comment Share on other sites More sharing options...
alopias Posted March 22, 2011 Author Share Posted March 22, 2011 others ray teeth Dasyatis serralheroi with nice colors .double Dasyatis probsti (Cappetta, 1970 ) Tony , many liters to find the material . Jess , I used common camera apn with zoom and my 35 mm Nikon lens . Link to comment Share on other sites More sharing options...
alopias Posted March 23, 2011 Author Share Posted March 23, 2011 here very very small teeth :pic: Rhinobatus antunesi : size 1,5 mm Pteroplatea . sp (Gimnura )size 1 mm Link to comment Share on other sites More sharing options...
xonenine Posted March 23, 2011 Share Posted March 23, 2011 Thanks alopias, I think I like these more than the shark teeth, beautiful! "Your serpent of Egypt is bred now of your mud by the operation of your sun; so is your crocodile." Lepidus Link to comment Share on other sites More sharing options...
Acryzona Posted March 23, 2011 Share Posted March 23, 2011 Beautiful teeth. Thanks for posting! Collecting Microfossils - a hobby concerning much about many of the little paraphrased from Dr. Robert Kesling's book Link to comment Share on other sites More sharing options...
sixgill pete Posted March 23, 2011 Share Posted March 23, 2011 alopias, again amazingly beautiful micro teeth. I have many of theses ray teeth. Is there a good site other than elasmo for identification? I am in the process of trying to catalog my micro's and need some help in identifying some of the ray and fish teeth. I have tried taking pictures of them but my camera just does not do a good job on ones that small. Bulldozers and dirt Bulldozers and dirt behind the trailer, my desert Them red clay piles are heaven on earth I get my rocks off, bulldozers and dirt Patterson Hood; Drive-By Truckers May 2016 May 2012 Aug 2013, May 2016, Apr 2020 Oct 2022 Link to comment Share on other sites More sharing options...
pleecan Posted March 24, 2011 Share Posted March 24, 2011 alopias: Fossils are just beautiful... stunning colors! Link to comment Share on other sites More sharing options...
Coco Posted March 24, 2011 Share Posted March 24, 2011 Hi, Alopias, your pics are marvelous (and teeth too !). What is your camera ? Coco ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici Mâchoires sélaciennes récentes : ici Hétérodontiques et sélaciens : ici Oeufs sélaciens récents : ici Otolithes de poissons récents ! ici Un Greg... Link to comment Share on other sites More sharing options...
Foshunter Posted March 24, 2011 Share Posted March 24, 2011 Beautiful hard to find teeth and the photography is exellent, thanks for sharing--Tom Grow Old Kicking And Screaming !!"Don't Tread On Me" Link to comment Share on other sites More sharing options...
JohnJ Posted March 24, 2011 Share Posted March 24, 2011 Incredible finds and beautiful photos, Alopias! The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
alopias Posted March 25, 2011 Author Share Posted March 25, 2011 thanks all ! sixgil pete ; its no easy to determine precisely ray teeth ; I used the book ( Cappetta ) . coco , later I show my technique photo OK here , Mobula loupianensis size 3 mm . Dasyatis cavernosa size 3,5 mm (?) (probst 1877 ) Link to comment Share on other sites More sharing options...
alopias Posted March 27, 2011 Author Share Posted March 27, 2011 (edited) another rays teeth , Dasyatis rugosa size : 3 mm ( probst 1877) very small and rare teeh , Pristis aquitanicus size : under 1,5 mm (delfortrie 1870 ) :pic: Edited March 27, 2011 by alopias Link to comment Share on other sites More sharing options...
Nandomas Posted March 27, 2011 Share Posted March 27, 2011 Great photos and specimens... thanks to share Erosion... will be my epitaph! http://www.paleonature.org/ https://fossilnews.org/ Link to comment Share on other sites More sharing options...
Diplotomodon Posted March 27, 2011 Share Posted March 27, 2011 Teeny tiny teeth with a big impression...thanks for sharing! Gotta love those microfossils What a wonderful menagerie! Who would believe that such as register lay buried in the strata? To open the leaves, to unroll the papyrus, has been an intensely interesting though difficult work, having all the excitement and marvelous development of a romance. And yet the volume is only partly read. Many a new page I fancy will yet be opened. -- Edward Hitchcock, 1858 Formerly known on the forum as Crimsonraptor @Diplotomodon on Twitter Link to comment Share on other sites More sharing options...
siteseer Posted March 27, 2011 Share Posted March 27, 2011 For teeth like this, if they aren't covered by elasmo, you really have to hunt technical articles. Look for papers on other faunas, other ages (Cenozoic), and even modern stuff. Most rays will follow the general morphology of, or close to, Dasyatis (stingrays), Mobula (manta relatives), Gymnura (butterfly rays, which tend to be rare where they are found), Rhinobatos (or other guitarfishes), Raja (or other skates). It's not always possible to identify ray teeth to species because even the modern ones have not been well-studied. Within Dasyatis, Mobula, and Raja there is a lot of variation because males and females almost always have different teeth (general rule: males have more pointed cusps; females have more rounded cusps). An ichthyologist has also cautioned me against trying too hard to ID stingray teeth to species because he has seen more variation within individual dentitions than is generally noted in the literature. alopias, again amazingly beautiful micro teeth. I have many of theses ray teeth. Is there a good site other than elasmo for identification? I am in the process of trying to catalog my micro's and need some help in identifying some of the ray and fish teeth. I have tried taking pictures of them but my camera just does not do a good job on ones that small. Link to comment Share on other sites More sharing options...
alopias Posted March 31, 2011 Author Share Posted March 31, 2011 Siteseer ,I agree, it's hard to indentify ray teeth other rays teeth ?? Dasyatis rugosa : 3,5 mm and Dasyatis serralheiroi nov .sp 3 mm Link to comment Share on other sites More sharing options...
wally Posted March 31, 2011 Share Posted March 31, 2011 Nice macro's alopias. I have somewhere a pdf about the loupian of france,will post it tomorrow. wally Link to comment Share on other sites More sharing options...
alopias Posted April 5, 2011 Author Share Posted April 5, 2011 for this specimen , I think this is : Plinthicus stenodon or Manta fragilis ? size : 70 mm Link to comment Share on other sites More sharing options...
barefootgirl Posted April 6, 2011 Share Posted April 6, 2011 Very nice little micro teeth! In formal logic, a contradiction is the signal of defeat: but in the evolution of real knowledge, it marks the first step in progress toward victory. Alfred North Whithead 'Don't worry about the world coming to an end today. It's already tomorrow in Australia!' Link to comment Share on other sites More sharing options...
alopias Posted April 9, 2011 Author Share Posted April 9, 2011 thank you barefootgirl here ray dermal denticles 1,5 cm and the second 8 mm Link to comment Share on other sites More sharing options...
siteseer Posted April 11, 2011 Share Posted April 11, 2011 Alopias, I think it is fragilis. Plinthicus teeth have numerous fine ridges on the labial and lingual faces which I do not see on your tooth. Cappetta no longer considers fragilis to belong to Manta (different tooth type). He thinks it could be belong to Mobula but isn't sure because modern mobulid teeth remain largely unstudied. Others assign fragilis to Paramobula, a genus which was created specifically for fragilis. In any case both Plinthicus and fragilis are rare teeth so you have something interesting. Jess P.S. I am a little uncertain of a French term. Cappetta used "canelures" in his 1970 description of fragilis. I assume it is like a "sillon" (= groove, in English). I looked at elasmo.com but there is not a lot of discussion on the tooth characters of Plinthicus nor Paramobula. for this specimen , I think this is : Plinthicus stenodon or Manta fragilis ? size : 70 mm Link to comment Share on other sites More sharing options...
Hieronymus Posted April 11, 2011 Share Posted April 11, 2011 Siteseer, I don't have the publication with me right now but I think "cannelures" has something to do with the ornamentation of the tooth. I don't think it's a feeding groove, but rather a shallow striation or wrinkle on the crown surface. http://rhaetianlorraine.webs.com/ Link to comment Share on other sites More sharing options...
Coco Posted April 11, 2011 Share Posted April 11, 2011 Jess, please indicate here the title, the year and all the authors of this publications, and I will see if I have it and if I can explain "canelures". This world could have several means, and I have to read what he wrote to understand what is "canelures". We maybe already spoke about it in past, because I vaguely remember having tried to understand a description in french without arriving there... Coco ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici Mâchoires sélaciennes récentes : ici Hétérodontiques et sélaciens : ici Oeufs sélaciens récents : ici Otolithes de poissons récents ! ici Un Greg... Link to comment Share on other sites More sharing options...
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