Castoroides
| Castoroides | |
|---|---|
 | |
| Scientific classification | |
| Phylum | Chordata (mul)  |
| Class | Mammalia (mul) |
| Order | Rodentia (mul) |
| Dangi | Castoridae (mul)
|
genus (en)  | Castoroides Foster, 1838
|
| General information | |
| Tsayi | 1.9 m |
| Nauyi | 200 kg |
''castor'' (daga Latin castor (beaver) da -oides (kamar) [1]), ko giant beaver, wani nau'i ne mai banƙyama na manyan beavers da suka zauna a Arewacin Amurka a lokacin Pleistocene. A halin yanzu an gane nau'o'i biyu, C. dilophidus a Kudu maso gabashin Amurka da C. ohioensis a mafi yawan Arewacin Amurka. C. leiseyorum an bayyana shi a baya daga zamanin Irvingtonian amma yanzu an dauke shi a matsayin sunan da ba shi da inganci. Dukkanin samfurori da aka bayyana a baya a matsayin C. leiseyorum ana ɗaukar su na C. dilophidus.
Bayyanawa
[gyara sashe | gyara masomin].jpg)
Dabbobi na Castoroides sun fi girma fiye da beavers na zamani. Matsakaicin tsawon su kusan 1.9 metres (6.2 ft) , kuma suna iya girma kamar 2.2 metres (7.2 ft) . Nauyin giant beaver na iya bambanta daga 90 kilograms (198 lb) zuwa 125 kilograms (276 lb) . Wannan ya sa ya zama mafi girman sanannen dabba a Arewacin Amurka a lokacin Pleistocene kuma mafi girman sanannun beaver.[2] Bincike na baya-bayan nan ya nuna cewa sun yi nauyi kadan, kusa da 77 kilograms (170 lb) , amma wannan yana da rikici.
Ƙafafun baya na giant beaver sun fi girma fiye da na beavers na zamani, yayin da ƙafafun baya sun fi guntu. Wutsiyar ta fi tsayi kuma wataƙila ba ta da siffar paddle kamar yadda yake a cikin beavers na zamani. Ana iya ɗauka kawai cewa ƙafafunsa suna da sutura kamar yadda yake a cikin jinsunan zamani.[2][3] Tsarin kwanyar giant beaver ya nuna cewa ya shiga cikin aikin da aka faɗaɗa a ƙarƙashin ruwa, godiya ga ikon ɗaukar ƙarin iskar oxygen a cikin huhu.[3]
Ɗaya daga cikin halaye masu mahimmanci na giant beaver shine hakoran su, wanda ya bambanta da girman da siffar daga na beavers na zamani. Beavers na zamani suna da incisors tare da enamel mai santsi, yayin da hakoran giant beaver suna da sassauci, sassauci.[4] Hanyoyin su ma sun fi girma, har zuwa 15 cm (6 in) tsawo.[4]
Manazarta
[gyara sashe | gyara masomin]- ↑ "Glossary. American Museum of Natural History". Archived from the original on 20 November 2021.
- 1 2 Swinehart, Anthony L.; Richards, Ronald L. (2001). "Paleoecology of Northeast Indiana Wetland Harboring Remains of the Pleistocene Giant Beaver (Castoroides Ohioensis)". Proceedings of the Indiana Academy of Science. 110: 151. Retrieved 21 November 2014.
- 1 2 "Giant Beaver: Natural History Notebooks". Canadian Museum of Nature. 2011-05-02. Retrieved 18 December 2011.
- 1 2 Harrington, C.R. (1996). "Yukon Beringia Interpretive Center – Giant Beaver". Archived from the original on 2007-09-14. Retrieved 2007-09-17.
