Lot 5012
年代(Age): Cretaceous 83-66 Ma。 尺寸(Size): 32 cm。 描述 Description:Placenticeras sp. is renowned for its mesmerizing iridescence and rarity. Its outer shell is composed of aragonite, which creates a diffraction effect under light, producing a rainbow-like spectrum of colors. This particular specimen is exceptionally rare, as it bears distinct Mosasaur bite marks on its shell. As one of the apex marine predators of its time, the Mosasaur’s attack left behind remarkably clear feeding traces. This not only provides direct evidence of the survival challenges ammonites faced but also offers valuable insights for paleontologists studying predator-prey interactions in ancient marine ecosystems.
- Provenance: Origin:Alberta, Canada。 產地:加拿大 艾伯塔。
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| From: | To: | Increments: |
|---|---|---|
| NT$0 | NT$49,999 | NT$2,000 |
| NT$50,000 | NT$99,999 | NT$5,000 |
| NT$100,000 | NT$999,999 | NT$10,000 |
| NT$1,000,000 | NT$9,999,999 | NT$100,000 |
| NT$10,000,000 + | NT$200,000 |
