2004年1月1日 · Compared to delphinoids (monodontids, phocoenids, and delphinids), the shoulder of the La Plata river dolphin, Pontoporia blainvillei, exhibits a greater degree of muscle differentiation...

Size: Dorudon atrox is estimated to have been around 5 meters in length (approximately 16 feet) as an adult, similar in size to the modern beluga (Delphinapterus leucas). Anatomy: Dorudon, along with other basilosaurids, differed from all modern cetaceans in …

2007年8月23日 · In contrast to the rounded distal humeral trochlea, common in mammals and the archaeocetes Ichthyolestes (Thewissen et al., 2001) and Dorudon atrox (Uhen, 2004), cetaceans have an immobilized cubital (elbow) joint with humeral articular surface facets offset in a v-shape that effectively locks the radius and ulna in place (Dwight, 1871; True ...

Vertebral formula for Dorudon is seven cervicals, 17 thoracics, 20 lumbars, no apparent sacrals (no articulation with pelvic bones), and 21 caudals.

矛齿鲸 (Dorudon atrox)学名意为拥有矛状牙齿的鲸鱼，是龙王鲸科中的一个属，泛指矛齿鲸亚科的所有生物。体长5米左右，重约600公斤，生活在约3800万年前的始新世。

About the size of the modern beluga whale, Dorudon atrox is an important find for scientists. It's skeletal structure resembles modern whales, but retains some features that give clues about how this group of successful marine mammals evolved from land-living ancestors.

Dorudon atrox (Andrews), 1906 14 III. Dental and Skeletal Anatomy 17 Dental Anatomy 17 Deciduous dentition 17 Permanent dentition 23 Cranial Anatomy 35 Face and palate 35 ... Shoulder girdle 100 Brachium 102 Antebrachium 106 Manus 110 Hind Limb 117 Innominate 117 Cms 117 Pes 121 IV. Anatomical Reconstruction 123

Form, Function, and Anatomy of Dorudon Atrox (Mammalia, Cetacea): An Archaeocete from the Middle to Late Eocene of Egypt

2021年10月6日 · Dorudon’s name translates to “spear-toothed.” In fact, having spear-shaped teeth is one of Dorudon’s defining features. Unlike modern whales with mostly similar-shaped teeth inside their mouths, Dorudon had “heterodont” teeth.

Dorudon was a genus of ancient cetacean that lived alongside Basilosaurus 40 to 36 million years ago, in the Eocene. They were about 5 metre long and were most likely carnivorous, feeding on small fish and mollusks.