Overall, the fossil record and anatomical studies of baleen whales illustrate a complex evolutionary ... system using baleen plates instead of teeth. Archaeocetes: An extinct group of early ...

The fossil was valued at around $2,500 ... and are key to understanding the evolution from teeth to feeding with baleen. Modern baleen whales use baleen plates that filter prey like krill from ...

Sander’s colleague Heinz Furrer of the University of Zurich found these fossils from the late 1970’s until 1990. At one site, Furrer found a tooth. Most of the giant ichthyosaurs previously found were ...

The fossil specimens, at 17 to 19 million years old ... tell the difference between a baleen whale and another cetacean by checking if it has teeth. Baleen whales, such as gray whales, blue whales, ...

Baleen whales evolved bristly baleen plates instead of teeth, which filter or trap krill ... of fish and land carnivores. We ...

These whales' massive heads and jaws accommodate hundreds of baleen “teeth.” Rights and other baleen-feeding whales use a comblike strainer of baleen plates and bristles to ensnare tiny ...

that hangs from the upper jaws of baleen whales (Mysticeti). Instead of teeth, these whales use baleen plates to filter-feed on small prey like krill, plankton, and small fish. But this 52-hertz ...

New research finds some baleen whale species call at such deep frequencies that they're completely undetectable by killer whales, which cannot hear sounds below 100 hertz. These also tend to be the ...