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Showing results for tags 'isurus'.
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From the album: Shark Fossil collection
Isurus oxyrinchus (shortfin mako) teeth from the Portuguese miocene -
From the album: Shark Fossil collection
I. paucus or I. hastalis? from the Portuguese Miocene -
Isurus praecursor/ Macrorhizodus praecursor
BellamyBlake posted a topic in General Fossil Discussion
Are Isurus praecursor and Macrorhizodus praecursor synonyms? I have conflicting accounts on this and would like clarification please. Thank you, Bellamy -
From the album: Shark Fossil collection
Isurus (Mako Shark) from the Miocene, Portugal -
From the album: Shark Fossil collection
Isurus (Mako Shark) from the Miocene, Portugal -
My 7 year son spotted this gem the other day. Such a beauty isn't it?
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Hello. I found this tooth about a year and a half ago in the spoil piles outside the Aurora Fossil Museum. I was wondering if anyone could help me identify it? I think it might be a mako tooth (Isurus oxyrinchus?). Also, does anyone know why one side of the root is much smaller than the other? Is that damage? Or maybe due to jaw position? Thanks for your help.
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Hello, this tooth was found in Lučenec region, southern Slovakia. Age: Eggenburgian (Central Paratethys): about 20.8 – 18.3 mil years old. Scale is in cm. Although there is nothing left out of the root, the crown is still very nicely preserved. Comparing to its size, the crown is really broad and flat. Could this be the Isurus retroflexus tooth (maybe the broad form) ? Haven't been lucky with these so far.
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I have a little doubt about this one here. I have found this piece in Lučenec region, southern Slovakia. Age: Eggenburgian (Central Paratethys): so about 20.8 – 18.3 mil old. Scale is in cm. The tooth is lightly curved without any serrations. After some observations of the root and the transitional area between the tooth and the root I have ended up with conclusion, that this should be Isurus desori aka Isurus oxyrinchus tooth. What do you think?
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From the album: Pisces
Whatever it's called, Carcharodon, Cosmopoltidus or Isurus, it has a slant length of 25mm. Burdigalian OMM Early Miocene From Billafingen, Germany -
From the album: Pisces
2cm. Or Carcharodon hastalis. Or Isurus hastalis. Whatever.... Burdigalian, Miocene. Found at Billafingen, Baden-Wuerttemberg, Germany. Genus to "Isurus" hastalis is still being debated. Some call it Carcharocles. -
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- retroflexus
- miocene
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From the album: Misc. Cenozoic Specimens
Isurus oxyrinchus -
From the album: Misc. Cenozoic Specimens
Isurus oxyrinchus -
Despite several visits to Sharktooth Hill and hundreds of teeth, I've yet to confirm a shortfin mako (Isurus oxyrinchus or is it Isurus desori?). Perhaps this is a possible candidate. Or maybe another C. planus or C. hastalis lower. To me, the features that make this one look different from those other common STH teeth are that it is relatively long with a narrow base/wide root, and also that little bend at the tip when viewed from the side (I think it shows up in the bottom two pics ok). It just stuck out as "something different" and I was able to eliminate a lot of other possibilities. So ma
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Hello to all of you, I would like to kindly as you about your opinion, because recently I have started to sort out my collection of shark teeth and I was hoping maybe here I will find someone who could help me with some ID's. I have found this shark tooth, which is not exactly small in the southern Slovakia. Age: lower miocene (Eggenburg). My guess is that it could be Isurus retroflexus, but I'm not sure. As you can see the tip was broken long time ago before I have found it. Please see the pictures attached. Any input will be welcome. Wish you a nice day. Gabriel.
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I found this tooth last month in the Baltic Sea in Poland. After a little research I assumed it belongs to Isurus desori. The tooth is 24 mm long. Could you tell me if I’m right and how old probably this fossil is
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Is this tooth one of the Isurus species? Found on Topsail Island, North Carolina.
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Last week I was on holiday in the Netherlands/Belgium for a short time and I had the chance to visit the area of Antwerp to find some shark teeth. Too bad the weather wasnt good (I think it rained the entire day). Nevertheless I found some teeth and I have to say that I am kinda satisfed with the result! I almost sieved the whole day so my body still hurts a bit The material I searched in comes from the Miocene, Pliocene and was washed up from the extension of Churchill dock in Antwerp. Here are two "in-situ" pictures: A nice tooth on the sifte
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Our Shark Education Program- Giant Sharks with Giant Teeth
fossilsonwheels posted a topic in Member Collections
Our final stop in the Shark program is of course the giant Sharks of the Miocene. We wrap our adventure through the timeline of shark evolution by giving the kids what they expect to see, big shark teeth. Truthfully, we do not have many large shark teeth. I went for interesting teeth not big teeth but we have a few that will grab the kids attention. We give a very brief introduction to the giant sharks with a 2 inch Otodus tooth. We can spend too much time on Otodus or the ancestors of Megalodon as it just do not have time ( plus we do not have teeth from Auriculatus, Angustidens, or Chubutens -
The following content is purely based on applying a mathematical equation from Ferron (2017), who obtained it from Sambilay (1990). No other source besides a few used for length measurements have been used besides Ferron (2017). I am not a mathematician and my calculations may have mistakes, which is why I've shown all of my work in case any of you want to check my math. The formulas themselves may possibly be updated/invalidated by later studies. Please take this with the finest grain of salt. Apparently, Cretoxyrhina may possibly be the one of the, if not the fastest shark known
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I. paucus could be a junior synonym of C. hastalis?
Macrophyseter posted a topic in General Fossil Discussion
I've recently was lucky to have found an online copy of Purdy et al. (2001)'s paper on Lee Creek sharks, and I've found a passage that caught my interest- "In morphology, the teeth lsurus hastalis (Figure 27) are almost identical to those from large individuals (TL=3.7-4.3 m) I. paucus. The tips of the upper anterior teeth of the latter species, however (TL=2.3^1.2 m, n=9), usually lack the labial recurvature that is so well developed in I. hastalis (Figure 28a). In the small number of I. paucus dentitions available to us (n=9), only one dentition (Hubbell collection, JF91980, 2.6 -
One of my nice Lee creek mako teeth were sitting in one of my pockets with a few Hershey's chocolates with paper wrappers (don't ask why I was pretty hungry). after I ate them all, I looked at my tooth, and to my dismay saw that what looked like the ink from the wrappers had rubbed onto the root. Aside from the weird story, I have tried using a toothbrush with soap and water, to no avail. What would be the best way to get rid of the stain? I have attached before and after pics below. I know there are a few lighting differences, so I also put it aside one of my other lee creek makos that u
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From the album: Pisces
24mm. Shortfin Mako upper. From the Miocene at Calvert Cliffs, Maryland. Traded with Fossil-Hound.
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