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These anatomical differences suggest that these ancient species may not have necessarily been deep-sea squid hunters like the modern sperm whale, but that some genera mainly ate fish. [ 27 ] [ 58 ] Contrary to modern sperm whales, most ancient sperm whales were built to hunt whales.
Vestigiality is the retention, during the process of evolution, of genetically determined structures or attributes that have lost some or all of the ancestral function in a given species. [1] Assessment of the vestigiality must generally rely on comparison with homologous features in related species.
Scientific literature concerning vestigial structures abounds. One study compiled 64 examples of vestigial structures found in the literature across a wide range of disciplines within the 21st century. [73] The following non-exhaustive list summarizes Senter et al. alongside various other examples:
The remains display the typical streamlined body form of modern whales, yet retaining some of the primitive aspects of skull and tooth structure. The largest skeleton found reached up to 21 m in length, [7] with well-developed five-fingered flippers on the forelimbs and the unexpected presence of hind legs, feet, and toes, not known previously ...
The second species named in 1904, B. isis, lived in the region currently known as the Mediterranean Sea, with fossils found in North Africa and Jordan. Basilosaurus is thought to have been one of the largest animals of the Paleogene , with the type species B. cetoides measuring around 17–20 metres (56–66 ft) long and weighing up to 15 ...
The whale's remains suggest it's a smaller relative of Basilosaurus cetoides, which lived along Alabama's coast 34-40 million years ago. A teen found a 34-million-year-old whale skull in her ...
Researchers described the species — named Perucetus colossus, or “the colossal whale from Peru” — in the journal Nature on Wednesday. Each vertebra weighs over 220 pounds (100 kilograms ...
Firstly mistaken for one of New Zealand’s 13 other more common types of beaked whale, tissue samples — taken before they were buried — later revealed them as the enigmatic species. New ...