Search the Community
Showing results for tags 'serration'.
Found 12 results
-
Can anyone help me find the exact serration count for Megalosaurus bucklandii teeth?
-Andy- posted a topic in Questions & Answers
Hi all, I am doing some research on a tooth of mine, and I'd appreciate it if anyone could help me find the exact serration count for Megalosaurus bucklandii teeth Years ago, Troodon kindly provided these values: Distal Density: 8.75 to 20 / 5mm (Avg 13 / 5mm) Mesial Density: 8.5 to 20 / 5mm (Avg 12.1 / 5mm) However, I am looking for the exact values of the teeth used, not the average values. I tried looking for them in Dr Hendrick's 2019 paper, but I was unable to find them. What I mean is I'd like the value to be shown roughly like this: Tooth A - Distal density = X / 5mm | Mesial density = X / 5mm Tooth B - Distal density = X / 5mm | Mesial density = X / 5mm Tooth C - Distal density = X / 5mm | Mesial density = X / 5mm I have been scouring the internet for these info but I couldn't find any paper that provided the breakdown for Megalosaurus serration counts The primary reason I am asking is to check this - My tooth has a serration count of 12.5/5mm(Distal) and 14.5/5mm(Mesial). I am aware that for some Megalosaurus teeth, it's the reverse - the mesial denticles are larger than the distal denticles. However, I am unsure if the reverse could happen i.e. could the distal denticles of a Megalosaurus tooth be larger than the mesial ones Thank you for your help -
Fragment takes up most of the sediment which is 1.5cm please not the serrations in the photos. All photos are the same with different lighting. @Troodon @jpc Is this actually a tooth fragment or are the serrations fooling me?
-
Hello, I was doing a study on the T. rex and Nanotyrannus teeth specimens I had, and I wanted to compare them against a list of known T. rex teeth with measurement. The paper: Dental Morphology and Variation in Theropod Dinosaurs: Implications for the Taxonomic Identification of Isolated Teeth (JOSHUA B. SMITH, DAVID R. VANN, AND PETER DODSON) contains a list of 115 T. rex teeth. To make it easier to compare and read the data, I combined the measurements into a single chart, added colors and lines for ease of reading, and added the size and names of the T. rex used in the study Feel free to refer to the below chart for T. rex teeth measurements. I had to split the chart into 2 due to size limitations, but if you want the full-sized PDF version (25 MB), please message me so I can send it to you by email. If you have any suggestions to improve readability, or have your own data to add, go ahead and post it here! I will be posting pics and measurements of my various T. rex and Nanotyrannus teeth here @Troodon
-
Need some help confirming what type of tooth this partial specimen is. I found it along the Potomac in Virginia. I think it is a snaggletooth, but something seems weird about that diagnosis. Thanks!
-
Recently bought some physogaleus contortus teeth fossils, then I noticed that some of them have some serrated serrations but some of them don’t. I wonder if this is natural or if I misidentified it?
-
Hi everybody, it's been a long time since I've written something on the forum but I read the different thread pretty much every day. Observing in the shadow like Batman but without money, a cool costume and with an hernia just like every fellow 21 yo. However I've recently acquired a Carcharodon sp. tooth from Bahia Iglesia, labelled as an C. hastals with some sort of serration. From what I've read serration in this species might indicate some sort of patology/transitional form. In this case the cusplets/serrations are pretty much symmetrical on both side of the crown so I'm leading toward the second option. So, is this a transitional form of C. hastalis or an early C. hubbelli ? How can I distinguish between the two when the diagnostic characters aren't so obvious? I've also read that tooth from both species tend to have different characteristic if collected from different sites (like a C. hubbelli tooth where the serrations are just barely visible on the enamel) so I'm very confused. Last question: Teeth where the serrations are confined in small part of the enamel are linked just to early C. hubbelli (obviously if belonging to this specie) or is more related to individual differences into the population as a whole? Thanks to all for the answers.
- 1 reply
-
- 1
-
-
- bahia iglesia
- carcharodon
- (and 1 more)
-
.thumb.jpg.a1481886f85b5631d28671b216c31cab.jpg)
Marine Fossil Three Serrated Edges Late Pleistocene to Pliocene Southern California
MightyPretzel posted a topic in Fossil ID
Happy holidays everyone. I would greatly appreciate help identifying the following specimen. It was collected in the Santa Susana Mountains of Simi Valley, Ventura County, California. It came from the Saugus or Pico Formation. Saugus is late Pleistocene to late Pliocene while Pico is middle Pleistocene to Pliocene. My uncertainty regarding the exact formation arises from the fact that (1) it was float material already weathered out of the formation it came from and (2) based on limited research and knowledge, I believe there has been a lack of consenus regarding differentiation of the two formations (see recent work by Richard Squires et al. in Valencia and R. Squires in Newhall). I assume it is marine since all of Pico is marine and Saugus is non-marine to marine. At first I thought it was a shark tooth when I picked it up but I threw that thought out the window when I realized it had three serrated edges. Measures 22 millimeters long and 6.5 millimeters wide. It is 4 millimeters tall on one end and 9.5 millimeters tall on he end that has the needle structure. There are three to four 'bumps' on both long sides on the end with the needle. The bumps look evenly spaced. I can and will do my best to provide additional info if needed.
-
From the album: Marine reptiles and mammals
Basilosaurus isis molar(one side serrated, the other side smooth)still embedded in a small piece of jaw bone. sadly I don't have any information about the fossil other than it is B.isis, and was found in Egypt. -
What would this theropod tooth be its measure .7" and its form Two Medicine Formation.
-
Just thought I'd share some cool pictures I took with my macro lens, getting up close and personal with the knife-like serrations of a few teeth that I've found on my trips. Enjoy!
- 12 replies
-
- 3
-
-
- fossils
- galeocerdo
- (and 3 more)
-
-
Hi, A short while ago, my wife and I collected in a Hell Creek location on a private ranch in SE Montana. Associated finds were Nanotyrannus teeth, Triceratops teeth, as well as a few Hadrosaur and Triceratops bones. My wife found an unusual tooth. It is about 1 cm in length, curved in lingually, curved to the posterior, and it is serrated on the posterior edge. The denticles have a pronounced upward (towards the tip) direction, and the spacing between denticles is greater toward the base of the tooth. On the lingual face, there are pronounced ridges. From a recent post, I am considering Pectinodon or Troodon, as remote possibilities, but the denticles are not so large, oddly spaced, and there are the pronounced ridges. Any ideas? Thanks. Mark
.thumb.jpg.a1481886f85b5631d28671b216c31cab.jpg)
