dorudon वाक्य
उदाहरण वाक्य
मोबाइल
- Outside North America, " Zygorhiza " has only been reliably identified in New Zealand, whereas " Dorudon " only in Egypt.
- In the U . S ., " Zygorhiza " is known from the Gulf Coast, whilst " Dorudon " is known from southeastern Atlantic Coast.
- A basilosaurid was as big as the larger modern whales, with genera like " Basilosaurus " reaching lengths of up to long; dorudontines were smaller, with genera like " Dorudon " reaching about long.
- As the Oligocene dawns, " Basilosaurus ", " Arsinoitherium " and " Dorudon " will all vanish, victims of the climatic shifts that ended the Eocene, changing the warm sea into a cold ocean.
- The two species of " Dorudon " differ from other members of Dorudontinae mainly in size : they are considerably larger than " Saghacetus " and slightly larger than " Zygorhiza ", but also differ from both these genera in dental and / or cranial morphology.
- From this Gingerich concluded that " Rodhocetus " was swimming mostly at the surface by alternate strokes of its hind feet, and that it was insulated by fur rather than blubber, as are " Dorudon " and modern cetaceans, which made it buoyant and incapable of deep diving.
- The limited known material for " D . serratus " makes it difficult to compare the two species of " Dorudon " . placed " D . atrox " in the same genus as " D . serratus " because of similarities in size and morphology, but kept them as separate species because of differences in dental morphology.
- "Ichthyolestes ", the oldest of the pakicetids, had semicircular canals in the inner ear the same size as the living relatives of cetaceans, the artiodactyls, in contrast to the reduced size found in later pakicetids and protocetids, such as " Remingtonocetus ", " Indocetus ", and " Dorudon ", and extant cetaceans.
- Analyses of the stomach contents of " B . cetoides " has shown that this species fed exclusively on fishes and sharks, while bite marks on the skulls of juvenile " Dorudon " have been matched with the dentition of " B . isis ", suggesting a dietary difference between the two species, similar to that found in different populations of modern killer whales.
- Distinguishing features for the genus include : long and forward-pointing anticlinal ( i . e . the spines of the other vertebrae are inclined towards this specific vertebra ) which is a primitive retention in " Stromerius " not present in other basilosaurids . " Stromerius " is larger than the contemporary " Saghacetus " but smaller than the older " Dorudon ".
- Recent studies revealed that " Basilosaurus isis " had a power bone crushing bite, exerting over 16, 400 to 20, 000 pounds per square inch, arguably the strongest bite force of any organism, rivaling the likes of " Tyrannosaurus rex ", in order to crack open the skulls of young " Dorudon ", which were its preferred prey based on the bite marks found on the skulls of the " Dorudon ".
- Recent studies revealed that " Basilosaurus isis " had a power bone crushing bite, exerting over 16, 400 to 20, 000 pounds per square inch, arguably the strongest bite force of any organism, rivaling the likes of " Tyrannosaurus rex ", in order to crack open the skulls of young " Dorudon ", which were its preferred prey based on the bite marks found on the skulls of the " Dorudon ".
- Hugh Beadnell, head of the Geological Survey of Egypt 1896 1906, named and described " Zeuglodon isis " in based on a partial mandible and several vertebrae from Wadi Al-Hitan in Egypt . described a skull and some vertebrae of a smaller archaeocete and named it " Prozeuglodon atrox " ( = " Dorudon atrox " ) . discovered deciduous teeth in this skull and it was then believed to be a juvenile [ " Pro " ] " zeuglodon isis " for decades before more complete fossils of mature " Dorudon " were discovered.
- Hugh Beadnell, head of the Geological Survey of Egypt 1896 1906, named and described " Zeuglodon isis " in based on a partial mandible and several vertebrae from Wadi Al-Hitan in Egypt . described a skull and some vertebrae of a smaller archaeocete and named it " Prozeuglodon atrox " ( = " Dorudon atrox " ) . discovered deciduous teeth in this skull and it was then believed to be a juvenile [ " Pro " ] " zeuglodon isis " for decades before more complete fossils of mature " Dorudon " were discovered.
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