Search the Community
Showing results for tags 'isurus'.
-
From the album: Sharks
An early Lamnid (family that includes the modern great white and mako sharks) from Central Kazakhstan. Some consider this genus to be ancestral to Carcharodon or both Carcharodon and Isurus. The latter is a tempting hypothesis since molecular clock studies place the last common ancestor of the great white and makos in this time.-
- 1
-
-
- isurus praecursor
- kazakhstan
- (and 7 more)
-
From the album: Florida Vertebrates
Isurus hastalis Sarasota County, Florida -
Hello, I have found this tooth last year in Lučenec region, southern Slovakia. Age: lower Miocene/Eggenburgian (Central Paratethys). Scale is in cm. It looks like Isurus retroflexus tooth, but I want to be 100% about it. If it is the one, I can finaly add the first of this kind to my collection. Thank you in advance.
-
I recently found this large 2.5 inch Isurus desori tooth and it got me thinking… what is the largest Isurus desori/oxyrinchus tooth out there? Feel free to post some large ones!
- 6 replies
-
- 2
-
-
- shortfinmako
- desori
- (and 1 more)
-
From the album: Sharks
The Mako tooth design hasn't changed much in ~ 30 million years. The left tooth is the modern species I. oxyrinchus, the right one is I. desori (from Charleston, SC, 2 1/8" slant, Oligocene). Some would say that I. desori is the same as the modern species. -
Hi all, I found a couple tooth today on morning hunt in Charleston, SC. I am fairly certain the first tooth (in the first two pictures) is A. grandis. However, I am unsure if the second tooth (in the last two pictures) is A. grandis, alopias sp., or isurus. I had this discussion with @MarcoSr in another thread but they resemble each other so much I still can’t tell with my eye. happy to post additional pictures if needed and thanks in advance!!
-
Hey all, I wanted to share a large Isurus desori tooth I found this weekend in Charleston, SC. It measures just over 2 1/4 inches and is the biggest I have personally found!
- 8 replies
-
- 4
-
-
- south carolina
- charleston
- (and 2 more)
-
No modern phylogenetic analyses for extinct lamniformes?
Macrophyseter posted a topic in Questions & Answers
Taxonomic debate over extinct lamniformes remains a big thing, but I've noticed that it seems like there hasn't been any studies that use modern phylogenetic techniques (i.e. maximum parsimony) to resolve issues with extinct taxa (i.e. Carcharodon, Isurus, Macrorhizodus, Otodus). Is there a reason for this absence, or perhaps I simply have not come across one that already exists? I suppose it's possible that dental characteristics alone as character codes for a phylogenetic matrix may not be viable... -
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?
- 12 replies
-
- 10
-
-
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.
-
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.
-
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?
-
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. -
Found between Plum Point and Parker’s Creek. It is an upper anterior. Isurus retroflexus may be conspecific with Isurus paucus. Not found in situ.
- 2 comments
-
- 1
-
-
- isurus
- isurus paucus
- (and 7 more)
-
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
-
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.
-
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
