Jump to content

Search the Community

Showing results for tags 'theropod teeth'.

  • Search By Tags

    Type tags separated by commas.
    Tags should be keywords or key phrases. e.g. otodus, megalodon, shark tooth, miocene, bone valley formation, usa, florida.
  • Search By Author

Content Type


Forums

  • Community News
    • Member Introductions
    • Member of the Month
    • Members' News & Diversions
  • Fossil Discussion
    • General Fossil Discussion
    • Questions & Answers
    • Fossil Hunting Trips
    • Fossil ID
    • Partners in Paleontology - Member Contributions to Science
    • Fossil of the Month
    • Member Collections
    • A Trip to the Museum
    • Paleo Re-creations
    • Collecting Gear
    • Fossil Preparation
    • Is It Real? How to Recognize Fossil Fabrications
    • Member-to-Member Fossil Trades
    • Fossil News
  • General Category
    • Rocks & Minerals
    • Geology

Categories

  • Annelids
  • Arthropods
    • Crustaceans
    • Insects
    • Trilobites
    • Other Arthropods
  • Brachiopods
  • Cnidarians (Corals, Jellyfish, Conulariids )
    • Corals
    • Jellyfish, Conulariids, etc.
  • Echinoderms
    • Crinoids & Blastoids
    • Echinoids
    • Other Echinoderms
    • Starfish and Brittlestars
  • Forams
  • Graptolites
  • Molluscs
    • Bivalves
    • Cephalopods (Ammonites, Belemnites, Nautiloids)
    • Gastropods
    • Other Molluscs
  • Sponges
  • Bryozoans
  • Other Invertebrates
  • Ichnofossils
  • Plants
  • Chordata
    • Amphibians & Reptiles
    • Birds
    • Dinosaurs
    • Fishes
    • Mammals
    • Sharks & Rays
    • Other Chordates
  • *Pseudofossils ( Inorganic objects , markings, or impressions that resemble fossils.)

Blogs

  • Anson's Blog
  • Mudding Around
  • Nicholas' Blog
  • dinosaur50's Blog
  • Traviscounty's Blog
  • Seldom's Blog
  • tracer's tidbits
  • Sacredsin's Blog
  • fossilfacetheprospector's Blog
  • jax world
  • echinoman's Blog
  • Ammonoidea
  • Traviscounty's Blog
  • brsr0131's Blog
  • brsr0131's Blog
  • Adventures with a Paddle
  • Caveat emptor
  • -------
  • Fig Rocks' Blog
  • placoderms
  • mosasaurs
  • ozzyrules244's Blog
  • Terry Dactyll's Blog
  • Sir Knightia's Blog
  • MaHa's Blog
  • shakinchevy2008's Blog
  • Stratio's Blog
  • ROOKMANDON's Blog
  • Phoenixflood's Blog
  • Brett Breakin' Rocks' Blog
  • Seattleguy's Blog
  • jkfoam's Blog
  • Erwan's Blog
  • Erwan's Blog
  • marksfossils' Blog
  • ibanda89's Blog
  • Liberty's Blog
  • Liberty's Blog
  • Lindsey's Blog
  • Back of Beyond
  • Ameenah's Blog
  • St. Johns River Shark Teeth/Florida
  • gordon's Blog
  • West4me's Blog
  • West4me's Blog
  • Pennsylvania Perspectives
  • michigantim's Blog
  • michigantim's Blog
  • lauraharp's Blog
  • lauraharp's Blog
  • micropterus101's Blog
  • micropterus101's Blog
  • GPeach129's Blog
  • Olenellus' Blog
  • nicciann's Blog
  • nicciann's Blog
  • Deep-Thinker's Blog
  • Deep-Thinker's Blog
  • bear-dog's Blog
  • javidal's Blog
  • Digging America
  • John Sun's Blog
  • John Sun's Blog
  • Ravsiden's Blog
  • Jurassic park
  • The Hunt for Fossils
  • The Fury's Grand Blog
  • julie's ??
  • Hunt'n 'odonts!
  • falcondob's Blog
  • Monkeyfuss' Blog
  • cyndy's Blog
  • pattyf's Blog
  • pattyf's Blog
  • chrisf's Blog
  • chrisf's Blog
  • nola's Blog
  • mercyrcfans88's Blog
  • Emily's PRI Adventure
  • trilobite guy's Blog
  • barnes' Blog
  • xenacanthus' Blog
  • myfossiltrips.blogspot.com
  • HeritageFossils' Blog
  • Fossilefinder's Blog
  • Fossilefinder's Blog
  • maybe a nest fossil?
  • farfarawy's Blog
  • Microfossil Mania!
  • blogs_blog_99
  • Southern Comfort
  • Emily's MotE Adventure
  • Eli's Blog
  • andreas' Blog
  • Recent Collecting Trips
  • retired blog
  • andreas' Blog test
  • fossilman7's Blog
  • Piranha Blog
  • xonenine's blog
  • xonenine's Blog
  • Fossil collecting and SAFETY
  • Detrius
  • pangeaman's Blog
  • pangeaman's Blog
  • pangeaman's Blog
  • Jocky's Blog
  • Jocky's Blog
  • Kehbe's Kwips
  • RomanK's Blog
  • Prehistoric Planet Trilogy
  • mikeymig's Blog
  • Western NY Explorer's Blog
  • Regg Cato's Blog
  • VisionXray23's Blog
  • Carcharodontosaurus' Blog
  • What is the largest dragonfly fossil? What are the top contenders?
  • Test Blog
  • jsnrice's blog
  • Lise MacFadden's Poetry Blog
  • BluffCountryFossils Adventure Blog
  • meadow's Blog
  • Makeing The Unlikley Happen
  • KansasFossilHunter's Blog
  • DarrenElliot's Blog
  • Hihimanu Hale
  • jesus' Blog
  • A Mesozoic Mosaic
  • Dinosaur comic
  • Zookeeperfossils
  • Cameronballislife31's Blog
  • My Blog
  • TomKoss' Blog
  • A guide to calcanea and astragali
  • Group Blog Test
  • Paleo Rantings of a Blockhead
  • Dead Dino is Art
  • The Amber Blog
  • Stocksdale's Blog
  • PaleoWilliam's Blog
  • TyrannosaurusRex's Facts
  • The Community Post
  • The Paleo-Tourist
  • Lyndon D Agate Johnson's Blog
  • BRobinson7's Blog
  • Eastern NC Trip Reports
  • Toofuntahh's Blog
  • Pterodactyl's Blog
  • A Beginner's Foray into Fossiling
  • Micropaleontology blog
  • Pondering on Dinosaurs
  • Fossil Preparation Blog
  • On Dinosaurs and Media
  • cheney416's fossil story
  • jpc
  • A Novice Geologist
  • Red-Headed Red-Neck Rock-Hound w/ My Trusty HellHound Cerberus
  • Red Headed
  • Paleo-Profiles
  • Walt's Blog
  • Between A Rock And A Hard Place
  • Rudist digging at "Point 25", St. Bartholomä, Styria, Austria (Campanian, Gosau-group)
  • Prognathodon saturator 101
  • Books I have enjoyed
  • Ladonia Texas Fossil Park
  • Trip Reports
  • Glendive Montana dinosaur bone Hell’s Creek
  • Test
  • Stratigraphic Succession of Chesapecten

Find results in...

Find results that contain...


Date Created

  • Start

    End


Last Updated

  • Start

    End


Filter by number of...

Found 11 results

  1. Hey guys, I’m looking for some recommendations for a digital usb microscope. I’ve heard Dino Lite is a good brand, so I’ve been looking at some of their models. The main thing I’m looking to use it for is examining and measuring dinosaur teeth and serration density. I was looking at the Dino Lite AM3113 model or AF3113T model, as I’m looking for something in the $200-$300 range. The only thing I’m worried about with that model is the picture quality as the resolution is 640x480. Another reason I was leaning towards the Dino Lite is because I’ve heard they fit snug in their stands, where I’ve heard some others like Amscope were loose in the stands. Does anyone have any experience with these models? What microscopes do you guys use?
  2. Hello for a while now I’ve been looking for a Torvosaurus tanneri tooth. I have found out that many teeth are labeled as Torvosaurus tanneri but it doesent mean it is the correct id. One of the key components in identifying Torvosaurus teeth is serration density. I have always wondered what it mean and how to figure it out. Could someone help me? Thanks.
  3. Updated March 29, 2023 Changed information on Avisaurus archibaldi A few years ago most of the smaller theropod teeth from the Hell Creek/Lance Formations were identified based on teeth from the Campanian assemblages of North America. Over the past couple of years new discoveries have shed new light on the theropods of the end of the cretaceous and new species have been described. I have addressed these on separate topics but decided to put all of these together to get a better view of the current picture of the upper Hell Creek and Lance formations. If you see any omissions or errors feel free to let me know. Tyrannosaurids: Under Topic: Identification Tyrannosaurid Teeth From North America - General Fossil Discussion - The Fossil Forum Dromaeosaurids: There are two described in the Hell Creek Acheroraptor temertyorum and Dakotaraptor steini however there is mounting evidence that an additional one, mid-size, is present. Saurornitholestes and Dromaeosaurus species are not present. Acheroraptor temertyorum Identification: Like all Dromaeosaurid teeth the denticles are key and different between those on the anterior and posterior carinae. You should easily be able to see that the posterior ones are much larger. If the denticles are identical its probably a juvenile Nanotyrannus tooth. Secondly there are apicobasal ridges on the crown which are diagnostic to this species. There can be several on either side and fewer on posterior located teeth. The teeth are recurved and typically under 1/2" (13mm) long. Dakotaraptor steini Identification: Zapsalis sp. (UPDATE) Identification: Similar to Z. abradens from the Judith River Formation. Very compresses tooth with rounded serrations on the distal side and a smooth mesial edge. One flat tooth surface with longitudinal ridges This form of tooth has been identified as a premaxillary tooth on Saurornitholestes in Alberta. So these teeth should most likely be assigned to Archoraptor but will need new discoveries to confirm it. Update: The unserrated form of this tooth (paronychodon morph) may also be a premaxillary tooth of a Dromaeosaurid or Troodontid. New discoveries are needed to properly assign it. Troodontids: There are at least two present cf Troodon formosus and Pectinodon bakkeri. but only one described Pectinodon bakkeri. cf T. formosus is an easily recognizable tooth. Denticles strongly hooked and turned toward the tip Pectinodon bakkeri significantly smaller 6mm or less than Troodon teeth. Comb like denticles on posterior carina, lacking on the anterior side.. Positionally these teeth have different morphologies can been see in the photo. Reference from : Vertebrate Microfossil Assemblages by Sankey and Baszio Other Teeth: cf Paronychodon lacustris type teeth have several morph types are flat on one side and usually bear three or more longitudinal ridges. Another morp type can be seen in the image. The other side is convex and can be smooth or longitudinal ridges can be present as well.. This is a tooth taxon so placement is questioned by many. May be a Theropod or Pterosaur cf Richardoestesia gilmorei. These teeth may have two different morphologies and can include a long form whose serration density is very high. The information provided is the standard morphology. What is shown comes from the Larsen/Currie's paper. Data they used is from Longrich 2008. Taxonomic placement of these teeth is uncertain. Study included 33 teeth from the Lance & Hell Creek Formation - not all data was collected on these teeth CH Avg: 5.9 mm (Range 3.6 to 10) CBL Avg (14 teeth) 3.8 (Range 2.1 to 4.0) CBW Avg (14 teeth) 1.5 (Range 1.1 to 1.8) CBR: Avg (14 teeth) 0.40 CHR: Avg (33 teeth) 1.60 Density (16 Teeth) Distal: 6.75 (5/mm) or 1.4 mm. Mesial: 9.4 (5/mm) or 1.88 mm DSDI : 1.39 Other Characteristics - Rounded small denticles - Slight posterior recurve Photo Scale Bar : 1 mm References: Multivariate Analyses of Small Theropod Dinosaur Teeth and Implications for Paleoecological Turnover through Time Derek W. Larson, Philip J. Currie 2013 Longrich NR (2008) Small theropod teeth from the Lance Formation of Wyoming, USA. In: Sankey JT, Baszio S, editors. Vertebrate Microfossil Assemblages: Their Role in Paleoecology Richardoestesia isoceles. Typically are very compressed, elongated and form an isosceles triangle. Fine serrations can be present This species along with the Paronychodon is currently under study and will most likely be described to a new taxon which may not be dinosaurian . Albertonykus sp. is known from bones. Its teeth are very small and pointed. Photo of tooth is from the smaller Mongolian species Mononychus olecranus Morph types isolated small theropod teeth are abundant in these assemblages. Morph types exist and determining the taxonomic affinities of these teeth is problematic. So be prepared to identify these teeth as Theropod indet. Note A lot of what I've described here requires a detailed examination of the serrations. The crisper they are on your tooth the better the opportunity you will have to identify them. having some magnification capability helps Bird: Avisaurus archibaldi This tooth is typically sold as A. archibaldi. Unfortunately this morphology of tooth is most likely Crocodilian per a recent publication, see attached topic. A slightly different morphology pointed out in the paper is viewed as most likely Avian
  4. Looks like we have a number of new members who are interested in Dinosaur teeth so I thought this topic might be good for them and serves as a reminder for more experienced collectors. Let me start off the discussion by saying that identifying isolated dinosaur teeth is a challenge even for more experience collectors, so its not a trivial task. There is no one cookbook that has all the answers, just a number of technical papers and articles that provide some information on different localities or species. Many of teeth that are sold online carry identifications that dealers have historically ascribed to them but in too many cases these names are not accurate or are out of date. This is very common not only from Morocco but also North America, Europe and Asia. New discoveries can change the playing field very quickly and sellers may not be not quick to keep abreast of these changes. So let me recommend the following 1) Locality, Locality, Locality, cannot say it often enough it is the most important piece of information you can obtain in the identification of a tooth. Teeth from North American require the following information at a minimum: Geologic Formation, State/Province, and in the States needs to include County and in Alberta nearest town. The county provides you a check and balance to verify that the formation provided is good. Locality information that only includes a state or province like Alberta or Montana is not adequate to identify. Getting complete information from other Geographic locations can be problematic so try to obtain as much as possible. Do not just accept the use of just a country name like Madagascar or Niger need specifics. 2) Do not trust any identification you see on a tooth. I don't care if its from a trusted dealer, a dealer you've done business with before, a friend, a member of this forum or any auction site. You need to be the expert. 3) Educated yourself as much as possible, read papers, books or informational topics on this forum. Ask questions and post your interest here on the forum B4 you buy or trade. 4) Photos: Other than the obvious ID's you cannot look at the front and back of a theropod tooth to determine what it is, especially Triassic and Jurassic material. At a minimum photos needed are from both sides, base and closeup of the serrations. If someone is not interested in providing you these photos, move on and purchase/trade from someone else. (see below) 5) Additional characteristics may be required and that will be dependent on what you are buying. These include serration density at the midline of both carinae, width and length of the base and how far the mesial carina extends to the base. Again if someone is not willing to provide you this information just move on. 6). Purchase/Trade for quality teeth, the better the preservation the higher chance you have in getting an accurate ID. Teeth missing a significant portion of serrations on one or both edges, or very worn herbivore teeth can be very difficult to properly diagnose. Avoid buying: worn, cheap or incomplete teeth, save your money on better Q ones, exception being extremely rare teeth. 7) Avoid restored teeth unless it minimal or done on super rare teeth. Repairs are acceptable that includes crack fill or reattachment of broken teeth.. 8) More often that not you will not be able to identify down to a species name so its acceptable to have your tooth identified to a genus or family name. examples include: Tyrannosaurid indeterminate or Daspletosaurus sp. . Be patient someday your tooth may be fully described. 9) Yes unfortunately it takes work to properly identify a theropod tooth where most sellers won't take the time and just rely on photos or what the digger claims. Here are a couple of illustrations to help understand tooth terminology if asked to provide information. From " A proposed terminology of theropod teeth (Dinosauria, Saurischia) by Hendrickx, Mateus et al (2015) " Ideally photos should show all sides
  5. Not very much is published on rare teeth. I'm trying to compile some information so that collectors have something to look at. Might not get them all the answers but its a start. Any discrepancies seen in this info please let me know. If you see anything published that can add to those listed please let me know. Species included in this topic Neovenator salerii Eotyrannus lengi Megalosaurus bucklandi Proceratosaurus bradleyi Acrocanthosaurus atokensis Deinonychus antirrhopus (Page 2) Duriavenator hesperis (Page 2) Coelophysis bauri (Pg 2 - Link to Triassic) Daemonosasurus chauliodus (Pg2 - Link to Triassic) Tawa hallae (Pg 2 - Link to Triassic) Majungasaurus crenatissimus (Pg 3) Neovenator salerii Formation: Wessex Formation Location: Typically Isle of Wight Characteristics: Some lateral crowns show transverse and/or marginal undulations adjacent to the distal and/or mesial carinae Interdenticular sulci between distal denticles may be present Enamel Surface Texture : "ent" in illustration Mesial crowns have their mesial carina twisting strongly toward lingual side A flattened surface and or depression adjacent to the distal carina on the lingual side : "cos" in illustration Mesial carina not reaching the base on most lateral crowns Mesial denticles are shorter and distal ones Measurements: (From Hendrickx 2019 study) (3 isolated lateral teeth) DSDI: 0.833 to 1.03 (Avg 0.96) Distal Density: 14.5 to 18 / 5mm (Avg 15.8 / 5mm) Mesial Density: 15 / 5mm (Avg 15 / 5mm) Ratio's: CHR 1.5 to 2.2 (Avg 1.8), CBR 0.54 to 0.57 (Avg 0.55) Eotyrannus lengi Formation: Wessex Formation Location: Isle of Wight Characteristics: Slightly twisted mesial carina not extending to the root Distal denticles elongated in lateral teeth DSDI should be > 1.2 Transverse undulations: absent Interdenticular sulci may be present Measurements: (From Hendrickx 2019 study) (One isolated Pre-max tooth) DSDI: 1.06 Distal Density: 14.1 / 5mm Mesial Density: 15 / 5mm Ratio's: CHR: 2.6, CBR: 1.2 Measurements: (From @paulyb135 personal collection) (Isolated Lateral tooth) DSDI: 1.47 Distal Density: 3.4 / 1 m Mesial Density: 5 / 1mm Ratio's: CHR: 2.5, CBR: 0.8 Lateral Tooth Premaxillary Tooth (part of holotype) Megalosaurus bucklandi Formation: Tayton Limestone Location: Stonefield Slate Beds, Oxfordshire, Gloucesters Other Occurrences: Chipping Norton Limestone Formation Sharp's Hill Formation Characteristics: Transverse undulations can be well visible and numerous Interdental sulci can be present on both carinae Mesial denticles larger than Distal denticles (DSDI <.08) in some lateral distal teeth Mesial carina does not reach the cervix in most lateral crowns (Can extend 55 to 65% of crown height) Bilobate denticles can be present in mesial carina (see illustration) The mesial carina on mesial teeth is central located not twisted lingually and the distal carina is also centrally positioned weakly offset labially Measurements: (From Hendrickx 2019 study) (10 teeth, 8 isolated, 1 dentary, 1 maxillary) DSDI: 0.8 to 1.03 (Avg 0.9 ) Distal Density: 8.75 to 20 / 5mm (Avg 13 / 5mm) Mesial Density: 8.5 to 20 / 5mm (Avg 12.1 / 5mm) Ratio's: CHR 1.6 to 2.5 (Avg 2.1), CBR 0.39 to 0.68 (Avg 0.55) Bilobate denticles in Mesial carina Sixth right dentary tooth of Megalosaurus bucklandi Mantell, 1827 (OUMNH J13505), crown (B1 ), mesial (B2 ) and distal (B3 ) denticles in labial views, enamel texture Holotype Tooth Proceratosaurus bradleyi Formation: White Limestone,, Great Oolite Location: Gloucestershire, UK Other Occurrences: Not aware of others Characteristics: Very Fine Serrations on both Carina A basal constriction between crown & root is present in some premaxillary teeth (see photo) Mesial denticles smaller than Distal denticles Teeth are relatively small, holotype (considered late juvenile/subadult) see CH measuremets The premaxillary teeth are asymmetrical in cross section, with the mesial carina being displaced lingually The maxillary teeth are transversely flattened, strongly recurved, and have serrated mesial and distal carinae (see photo) In both the premaxillary and fully erupted maxillary teeth, the anterior carina does not extend all the way to the base of the crown, but ends at approximately half the height Individual denticles are chisel-shaped, rounded, and perpendicular to the long axis Basel ridges are seen on some Premaxillary and dentary teeth (see photo) Measurements: (From Hendrickx 2019 study) (9 teeth, 4 maxillary, 5 dentary, ) DSDI: 1 to 1.5 (Avg 1.28 ) Distal Density: 22 to 26 / 5mm (Avg 25.5 / 5mm) Mesial Density: 30 to 37.5 / 5mm (Avg 34 / 5mm) Ratio's: CHR 1.8 to 2 (Avg 1.9), CBR 0.5 to 0.8 (Avg 0.6) Crown Height (CH) Premaxillary teeth (5.3 to 6.7 mm), Maxillary teeth (4 to 12.7 mm), Dentary (4.2 to 11 mm) Reference is 4 good source of information Basal constriction Premaxillary tooth Ridges seen on some Premaxillary and Dentary Teeth Maxillary Teeth Anterior Dentary Teeth Acrocanthosaurus atokensis Formation: Antler Formation, Trinity Group Location: McCurtain County, Oklahoma (Study Group) Other Occurrences: Twin Mountains Formation (Trinity Group), Texas Arundel Formation, Maryland Cloverly Formation, Wyoming Cedar Mountain Formation, Utah* * Acrocanthosaurus sp.. tooth morphology not described. Please note it illegal to sell/purchase these teeth if found on State or Park land Characteristics: Apical denticulation (Contiguous keels with denticles continuing over the tip) (Lipka paper) Distal denticles perpendicular to axis Mesial denticles inclined to axis Transverse and marginal undulations can be present Mesial carina does not reach the base in most crowns Interdenticular sulci not evident Braided enamel (Not sure if its on all or some crowns) Measurements: (From Hendrickx 2019 study) Premaxillary teeth (4) DSDI: 1.3 to 1.5 / 5mm (Avg 1.45 / 5mm) Distal Density: 11.5 to 13.3 / 5mm (Avg 12.5 / 5mm) Mesial Density: 17 to 19 / 5mm (Midline Avg 18 / 5mm) (Apically Avg: 13.3 / 5 mm) Ratio's: CHR: 2.2 to 2.6 (Avg 2.4), CBR: 0.58 to 1 (Avg 0.76) Maxillary teeth (11) DSDI: .73 to 1.2 / 5mm (Avg 0.97 / 5mm) Distal Density: 11.5 to 15 / 5mm (Midline Avg 13.7 / 5mm) (Apically Avg: 11.7 / 5 mm) Mesial Density: 17 to 19 / 5mm (Midline Avg 18 / 5mm) (Apically Avg: 13.3 / 5 mm) Ratio's: CHR: 2.0 to 2.6 (Avg 2.3), CBR: 0.5 to 0.67 (Avg 0.58) Dentary teeth (17) DSDI: 0.83 to 1.0 / 5mm (Avg 0.95 / 5mm) (only 6 teeth) Distal Density: 12.5 to 16 / 5mm (Midline Avg 14.3 / 5mm) (Apically Avg: 12.7 / 5 mm) Mesial Density: 11.8 to 16.2 / 5mm (Midline Avg 11.7 / 5mm) (Apically Avg: 13.4 / 5 mm) Ratio's: CHR: 1.3 to 2.8 (Avg 2.1), CBR: 0.48 to 0.9 (Avg 0.61) Maxillary Jaw (#1 to 4) showing : tun: transverse undulations mun: marginal undulations dca: displaced carina Scale: 1 cm Maxillary tooth (#6) with mun and tun Scale: 1 cm Braided enamel texture on isolated tooth Believe these are distal denticles Scale: 1 mm Reference Material: (1)Hendrickx et al : Dental features in theropods 2019 https://palaeo-electronica.org/content/2019/2806-dental-features-in-theropods (2)Hendrick et al : Taxonomic identification of isolated theropod teeth: The case of the shed tooth crown associated with Aerosteon https://www.sciencedirect.com/science/article/abs/pii/S0195667118303860?via%3Dihub (3)Hendrick et al. : The Dentition of Megalosaurid Theropods https://bioone.org/journals/acta-palaeontologica-polonica/volume-60/issue-3/app.00056.2013/The-Dentition-of-Megalosaurid-Theropods/10.4202/app.00056.2013.full (4)Oliver Rauhut et al Cranial osteology and phylogenetic position of the theropod dinosaur Proceratosaurus bradleyi (Woodward, 1910) from the Middle Jurassic of England 2008 (5)Thomas Lipka The affinities of the enigmatic theropods of the Arundel Clay Facies
  6. Is it really from Carcharodontosaurus or some other theropod? Information I got with it, Carcharodontosaurus saharicus Kem Kem Beds, Morocco
  7. Theropod teeth from Uzbekistan typically are not seen for sale other than those from Tyrannosaurs. Opportunities always make themselves available so I decided to put a quick post out on those that have had some scientific research. I also think it's cool to see some of these teeth. We are looking at teeth from the Bissekty Formation, Touronian in age from the Kyzylkum Desert from the following two locations Dzharakuduk and Uchkuduk. There are younger and older deposits in this Desert but all of the teeth sold appear to be coming from those two localities. Changes to what is presented here most certainty will occur with continued research, understanding and new discoveries. Bissekty Tyrannosaurid: Tyrannosaurid indet. (in 2016 this was described as Timurlengia euotica) The Tyrannosaur from this locality has yet to be described. Once thought to be Alectrosaurus it is now viewed as a different Tyrannosaur. The Premaxillary teeth may or may not be serrated. They are your typically D shaped tooth. (17.5-27.5 denticles per 5mm) The scale bar represents 1mm. The Maxillary and Dentary teeth are typically very compressed (flattened) and recurved. Both carinae are serrated and have the same size denticles. Crowns can be quite different, some long and blade like others short and more stout. (12-22 denticles per 5mm on distal carina) The scale bar represents 1mm https://www.sciencedirect.com/science/article/pii/S019566711100187X Troodontid: Urbacondon sp. There are three taxa of troodontid dinosaurs recognized from the Kyzylkum Desert. Urbacondon itemirensis from the Cenomanian for the Dharakuduk Fm, an Indeterminate Troodontid from the Khodzhakul Formation and Urbacondon sp from the Bissekty Formation. The teeth are not common and only four teeth have been identified. A premaxillary tooth, anterior dentary tooth and a pair of maxillary or dentary teeth. Quite distinctive easy to identify. https://www.researchgate.net/publication/284813177_Troodontidae_Dinosauria_Theropoda_from_the_Upper_Cretaceous_of_Uzbekistan Therizinosauroid indet Therizinosaurs are among the most common theropod in terms of skeletal remains found. At least two undescribed taxa are present in the Bissekty Formation. Their teeth are small but easily identifiable. They are found with either conical and lanceolate crowns. The scale bar represents 1mm. https://www.sciencedirect.com/science/article/pii/S0195667115301117 Dromaeosaurid: Itemirus medullaris Dromaeosaurid remains are among the least common theropod found in this region. Teeth however are numerous. Like all Dromaeosaurid teeth there is a distinct difference between the size and density of serrations along the mesial and distal carinae. The distal denticles are always much larger. Anterior teeth have the medial carina twist. (3-6 denticles per 1mm on distal carina) If the serrations are identical it most likely is a Tyrannosaur or another Indeterminate Theropod. http://www.sciencedirect.com/science/article/pii/S0195667114001189?via%3Dihub
  8. FF7_Yuffie

    A few theropod teeth

    Hello, I have my eye on a few teeth. If someone can take a look and see that they all look ok, are as described etc, that would be great? 1 - A Tyrannosaur premax from Two Medicine. 2.2 cm -- No county known, unfortunately. I know this is a tricky formation that overlaps many counties, so I may leave this one if it cn't be confirmed as being from there via preservation/colorisation. 2 - Tyrannosaur tooth from Judith River. Lewistown, Montana. 1.7cm, sold as a juvenile. The crack visible seems like just a minor bit of damage and isn't anything to worry about? It doesn't seem like it goes through to the other side. I'll do another post with others.
  9. Came across this tooth labeled as an abelisaurus belonging to chinanisaurus barbaricus from the Maastrichtian supposedly found in the phosphate mines of the Ouled Abdoun basin. Looks pretty thick to be abelisaurus and comparable to an extent to some carcharodontosaurus teeth. Is there a way tell the difference or will there need to be more specifics involved.
  10. Alex Eve

    Saurornitholestes tooth position?

    Howdy! This is a dromaeosaur tooth from the upper Dinosaur Park Formation. I’m pretty sure it’s Saurornitholestes, but based on the size (1cm L) and shape, is it possible to tell the position in the mouth? (Ex maxilla, dentary, predentary?)
  11. Isolated teeth from the Tacuarembó Formation of Uruguay have revealed the first Megalosaurid from South America. The teeth have strong resemblance to Torvosaurus and as such the Megalosaur from Uruguay and Tanzania are suggested to be from Torvosaurus. It is paywalled but the abstract describes the features of the teeth. https://www.sciencedirect.com/science/article/abs/pii/S089598111930505X
×
×
  • Create New...