Slika:Basilosaurus cetoides (1).jpg

Iz Wikipedije, proste enciklopedije
Jump to navigation Jump to search
Izvirna datoteka(2.500 × 869 točk, velikost datoteke: 1,45 MB, vrsta MIME: image/jpeg)

Opis

Skeleton of a basilosaurus cetoides in the Sant Hall of Oceans in the Smithsonian Museum of Natural History in Washington, D.C. The name Basilosaurus means "king lizard"; the animal is a mammal, but was originally thought to be a kind of dinosaur or lizard. The name "cetoides" means "whale-like."

Basilosaurus cetoides lived 40 to 34 million years in warm seas around the world. It was first discovered in Louisiana in 1832. Skeletons were so common, people used them for chairs! Fossils have since been found in Pakistan and Egypt, and scientists think there may be anywhere from 3 to nine sub-species.

Basilosaurus cetoides grew to be about 59 feet (18 m) in length and was the largest animal on land or sea living at the time. The animal was extremely elongated. with the body behind the tail tapering rapidly. The bones at the tip of the tail indicate it had a very small fluke for its massive size. From the way the muscles appear to attach to the spine, the amazing flexibility of the spine, and other features, it's clear that basilosaurus cetoides used its whole body (not just the tail) to move through the water. It was much like an eel, although eels move sinuously side-to-side and the basilosaurus cetoides moved up and down!

Basilosaurus cetoides probably had a small dorsal fin or ridge, and had extremely tiny two foot (0.6 m) long hind limbs. These limbs had limited mobility, and in fact could only assume two positions: Against the body and against the belly. Scientists think that the limbs were used during sex, to help the male cling to the female.

The bones of basilosaurus cetoides were hollow and probably filled with fluid. This helped it maintain buoyancy in the ocean, and has led scientists to conclude that it did not dive much (if at all). It probably could not move very fast or for very long, and probably lurked at the surface as an ambush hunter. The brain in basilosaurus cetoides is quite small, which means it was probably a solitary animal. There is also no indication that it could echolocate like modern whales.

This skeleton in the Smithsonian is the only real specimen currently exhibited anywhere in the world.

Datum
Vir Basilosaurus cetoides - total view - Smithsonian Museum of Natural History - 2012-05-17
Avtor Tim from Washington, D.C., United States of America

Licenca[uredi]

w:sl:Creative Commons

priznanje avtorstva deljenje pod enakimi pogoji

Datoteka je licencirana pod dovoljenjem Creative Commons Priznanje avtorstva-Deljenje pod enakimi pogoji 2.0 Generična.
Dovoljeno vam je:
  • deljenje – reproduciranje, distribuiranje, dajanje v najem in priobčevanje dela javnosti
  • predelava – predelati delo
Pod naslednjimi pogoji:
  • priznanje avtorstva – pri uporabi dela morate navesti izvirnega avtorja na način, ki ga določi izvirni avtor oziroma dajalec dovoljenja (vendar nikakor ne na način, ki bi nakazoval, da avtor podpira uporabo dela ali vas).
  • deljenje pod enakimi pogoji – če spremenite, pretvorite ali gradite na tem delu, lahko takšno predelavo dela distribuirate samo pod isto, podobno ali kompatibilno licenco.

Checked copyright icon.svg This image, originally posted to Flickr, was reviewed on by the administrator or reviewer File Upload Bot (Magnus Manske), who confirmed that it was available on Flickr under the stated license on that date.

Zgodovina datoteke

Kliknite datum in čas za ogled datoteke, ki je bila takrat naložena.

Datum in časSličicaVelikostUporabnikKomentar
trenutno00:24, 28. junij 2012Sličica za različico 00:24, 28. junij 20122.500 × 869 (1,45 MB)File Upload Bot (Magnus Manske)Transferred from Flickr by User:FunkMonk using flickr2commons

Datoteka je del naslednje 1 strani slovenske Wikipedije (strani drugih projektov niso navedene):

Globalna uporaba datoteke

To datoteko uporabljajo tudi naslednji wikiji:

Metapodatki