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Placodus
Placodus was a marine reptile that lived about 240 million years ago, during the Middle Triassic. It had a stocky body, a long tail, and a heavy skull with flat teeth for crushing shellfish. It swam in shallow seas and probably spent most of its time on the seafloor looking for food.1
ມັນມີຊີວິດຢູ່ເມື່ອໃດ?
ມັນໃຫຍ່ປານໃດ?
ມັນຍາວປານໃດ?
ຍາວເທົ່າໝາ 3 ໂຕຕໍ່ກັນຈາກດັງຫາຫາງ🍌ຍາວເທົ່າກ້ວຍ 17 ໜ່ວຍຕໍ່ກັນ🏊ລອຍໄດ້ຄວາມຍາວສະລອຍນ້ຳໃຫຍ່ (50 ມ) ໃນ 11 ວິນາທີPlacodus ໃຫຍ່ປານໃດ ເມື່ອທຽບກັບເຈົ້າ?
ແຄ່ຄິດໄລ່ໃນບຣາວເຊີຂອງເຈົ້າ. ບໍ່ມີຫຍັງຖືກບັນທຶກ ຫຼື ສົ່ງໄປໃສ.
ມັນໄວປານໃດ?
ເລື່ອງໜ້າຮູ້ມ່ວນໆ
Placodus had a rigid body because the bones in its spine were dovetailed together, making its trunk stiff.1
Its belly was covered with special armor made of bent, right-angled abdominal ribs, and it had a row of bony knobs above its backbone.1
Placodus was negatively buoyant, meaning it was heavy and could easily stay on the seafloor without floating up.1
Before scientists knew what Placodus looked like, its teeth were mistaken for fish teeth.1
Placodus was slow and clumsy on land because of its heavy body armor, so it probably only came ashore to lay eggs.1
Its short legs probably ended in webbed feet, and it used its flattened tail to push through the water.1
ຄຳຖາມທີ່ຖືກຖາມຫຼາຍທີ່ສຸດກ່ຽວກັບ Placodus
?How big was Placodus?
About 2.5 to 3 metres (8.2 to 9.8 ft) long.1
?What did Placodus eat?
Shellfish like bivalves, plus other hard-shelled prey such as molluscs, brachiopods and crustaceans. It used its chisel-like front teeth to pluck them from the sea floor and its broad, flat back teeth to crush their shells.1
?Was Placodus a dinosaur?
No, Placodus was a marine reptile called a placodont, not a dinosaur. It lived in the sea during the Triassic period.12
?Could Placodus swim?
Yes, it swam using its flattened tail and short legs that probably ended in webbed feet. It was not as good at swimming as later marine reptiles like plesiosaurs, but it was comfortable in the water.1
?Why did Placodus have a rigid body?
Its spine had dovetailed bones that locked together, making its trunk stiff. This helped it stay heavy on the sea floor so it could feed without floating up.1
?When did Placodus live?
About 240 million years ago, in the Middle Triassic period.1
ສຳລັບຜູ້ຊ່ຽວຊານໄດໂນ
- ຊື່ວິທະຍາສາດ
- Placodus
- ຕັ້ງຊື່ໂດຍ
- Agassiz 18333
- ກຸ່ມ
- ສັດເລືອຄານທະເລ
- ຄອບຄົວ / ເຄລດ
- Placodontidae3
- ການຈັດໝວດໝູ່
- Placodontia > Sauropterygia3
- ອາຍຸຂອງຫີນ
- 251 ຫາ 227 ລ້ານປີ ()3
- ຊັ້ນຫີນ
- Jena, Wellenkalk, Vossenveld3
- ປະເທດ
- ເຢຍລະມັນ, ອິດສະຣາເອນ, ໂປແລນ, ເນເທີແລນ, ອີຕາລີ, ຈີນ3
- ບັນທຶກຟອສຊິລ
- 34 ໃນ The Paleobiology Database3
- ມີຊື່ອື່ນວ່າ
- Anomosaurus, Crurosaurus (ຊື່ເກົ່າທີ່ຕອນນີ້ນັບເປັນສັດໂຕດຽວກັນ)3
- ການຄົ້ນພົບ
- Placodus was named by the Swiss naturalist Louis Agassiz in 1833. He originally thought the fossils were fish teeth.13
ຂໍ້ມູນມາຈາກໃສ
- Placodus (en.wikipedia.org)
- Fossil Focus: Placodonts – PALAEONTOLOGY[online] (palaeontologyonline.com)
- Placodus in The Paleobiology Database (CC BY 4.0): ອາຍຸ, ສະຖານທີ່, ຊັ້ນຫີນ, ການຈັດໝວດໝູ່.
ທຸກຂໍ້ມູນໃນໜ້ານີ້ມີຕົວເລກທີ່ຊີ້ໄປຫາແຫຼ່ງອ້າງອີງ. ຖ້າພວກເຮົາຜິດພາດ, ຂໍໂທດເດີ, ພວກເຮົາເປັນແຟນໄດໂນ ບໍ່ແມ່ນວາລະສານວິທະຍາສາດ. ບອກພວກເຮົາທີ່ [email protected] ແລ້ວພວກເຮົາຈະແກ້ໄຂ.
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