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Found 11 results

  1. fossilsonwheels

    Pisco Formation Carcharhinus teeth

    I’m starting to work on the Carcharhinus and related shark displays. I’ve got three teeth from the Pisco Formation, Sacaco location that I can’t quite nail down as far as ID. I know they could end up being Carcharhinus sp but I thought I’d give an ID post a chance. I’m not really confident in my ability to ID the gray sharks. The first two look like they might be C. obscurus to me but I know there would be other possibilities. They are both right around 13mm on the slant so not very large. The first one is in better shape, the second is pretty worn. The third tooth is actually a really cool looking tooth. It’s about 10mm on the slant and 14mm wide. This one has me pretty stumped. Could be a C. brachyurus but none of the teeth in my collection match it enough for me to be sure.
  2. ThePhysicist

    Great White Shark Tooth (Neonate)

    From the album: Sharks

    Carcharodon carcharias (Neonate) Pisco Formation, Departamento de Arequipa, Sitio Sacaco, Peru Right Upper Lateral A small tooth from a young-of-the-year great white (~ 1.5 m / 5 ft total length). Teeth of these very young individuals are narrower than adult teeth, and possess lateral "cusplets" - features that aid in their piscivorous (fish-dominated) diet.
  3. ThePhysicist

    Great White Shark Tooth (Young Juvenile)

    From the album: Sharks

    Carcharodon carcharias (Young Juvenile) Pisco Formation, Departamento de Arequipa, Sitio Sacaco, Peru 2nd? Left Upper Anterior A small tooth from a very young great white (< 2 m / 7 ft total length). Teeth of these very young individuals are narrower than adult teeth, and can possess lateral "cusplets" - features that aid in their piscivorous (fish-dominated) diet.
  4. ThePhysicist

    Great White Shark Tooth (Neonate)

    From the album: Sharks

    Carcharodon carcharias (Neonate) Pisco Formation, Departamento de Arequipa, Sitio Sacaco, Peru 2nd Left Upper Anterior A small tooth from a young-of-the-year great white (~ 1.5 m / 5 ft total length). Teeth of these very young individuals are narrower than adult teeth, and possess lateral "cusplets" - features that aid in their piscivorous (fish-dominated) diet.
  5. ThePhysicist

    Great White Shark Tooth (Neonate)

    From the album: Sharks

    Carcharodon carcharias (Neonate) Pisco Formation, Departamento de Arequipa, Sitio Sacaco, Peru Lower Lateral A small tooth from a young-of-the-year great white (~ 1.5 m / 5 ft total length). Teeth of these very young individuals are narrower than adult teeth, and possess lateral "cusplets" - features that aid in their piscivorous (fish-dominated) diet.
  6. ThePhysicist

    Great White Shark Tooth (Neonate)

    From the album: Sharks

    Carcharodon carcharias (Neonate) Pisco Formation, Departamento de Arequipa, Sitio Sacaco, Peru 2nd Right Lower Anterior A small tooth from a young-of-the-year great white (~ 1.5 m / 5 ft total length). Teeth of these very young individuals are narrower than adult teeth, and possess lateral "cusplets" - features that aid in their piscivorous (fish-dominated) diet.
  7. ThePhysicist

    Great White Shark Tooth (Neonate)

    From the album: Sharks

    Carcharodon carcharias (Neonate) Pisco Formation, Departamento de Arequipa, Sitio Sacaco, Peru 3rd Right Upper (Intermediate) A small tooth from a newborn great white shark (~ 1.5 m / 5 ft total length). This is a rare intermediate tooth which is mesially-slanted, and reduced in size relative to adjacent teeth. The smaller size of the 3rd upper anterior is an adaptation unique to the dentitions of Lamniforms, thought to concentrate the bite force in the first two upper anteriors.
  8. ThePhysicist

    Neonatal Great White Shark Tooth

    Identification Teeth of Carcharodon carcharias may be identified by triangular crowns with no nutrient groove in the root, no lingual dental band ("bourlette"), and irregular triangular serrations on the edges. Teeth of neonatal individuals (newborn/young of the year) possess small lateral "cusplets," with a deep "V" profile made by the root lobes, and are more narrow than adult teeth1. This narrow tooth form with cusplets is suited for the great white's piscivorous (fish-dominated) diet at a young age. Comments This is an exceptional upper right lateral tooth from a newborn or full-term embryo great white ( ~ 1.5 m / 5 ft total length). This tooth was exported from Peru prior to 1990. References 1. Tomita, T., Miyamoto, K., Kawaguchi, A., Toda, M., Oka, S.-I., Nozu, R. and Sato, K. (2017), Dental ontogeny of a white shark embryo. Journal of Morphology, 278: 215-227. https://doi.org/10.1002/jmor.20630
  9. Macrophyseter

    DKNC-002 Carcharodon carcharias (Sacaco)

    From the album: Elasmobranchs

    TFF DKNC-002 Tooth height is ≈1-3/8 inches (3.5 cm)

    © David Kn.

  10. Recently I aquired this Carcharodon tooth from Sacaco, Peru whose serrate conditions seems a bit peculiar to me. I can't really decide whether or not this tooth is from a late-stage hubbelli or an early carcharias. The serrations seem to wear/taper off just short of the tip on one side and abruptly end near it on another, and some (although not all) of the serrations appears to be angled in a way, although I suspect some may be due to wear. My thoughts on the serrations keep seesawing in my head. Would this tooth better represent a late-stage hubbelli or a carcharias? Thanks for any and all answers. Lingual
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