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Archaeoceti ("ancient whales"), or Zeuglodontes in older literature, is a paraphyletic group of primitive cetaceans that lived from the Early Eocene to the late Oligocene 1] Representing the earliest cetacean radiation , they include the initial amphibious stages in cetacean evolution , thus are the ancestors of both modern cetacean suborders ...
Another similar feature was the composition of the teeth, which contained mostly calcium phosphate which is needed for eating and drinking by aquatic animals, though, unlike modern day toothed whales, they had a heterodont (more than one tooth morphology) dentition as opposed to a homodont (one tooth morphology present) dentition. [62]
The other two genera in the family, Gandakasia and Himalayacetus, are known only from teeth and mandibular fragments. [3] Retaining large hindlimbs, it was once thought that they could walk on land—indeed, their name means "walking whales"—, but recent research suggests they may have been fully aquatic like modern cetaceans, though the ...
On the tail of the discovery of a whale fossil that is the largest animal on record, researchers in Egypt announced the unearthing of one of the smallest early whales known to science. The find is ...
The teeth of the preserved fossils show similarity to the teeth of Basilosaurus, another genus of prehistoric cetaceans. The incisors are cone-like, linking Maiacetus to modern toothed whales and other extinct cetaceans. The middle ear bones are also similar to those of Basilosaurus and modern whales. [5]
A high school student made an incredible discovery in her own backyard: A 34-million-year-old whale skull. Sixteen-year-old Lindsey Stallworth and her biology teacher, Andrew Gentry, found small ...
Specimens were collected from the ocean near Vanuatu in 1994, but researchers only recently identified them as a new species, a study said. Creature with ‘large’ mouth and pointy teeth found ...
Unlike human teeth, which are composed mostly of enamel on the portion of the tooth outside of the gum, whale teeth have cementum outside the gum. Only in larger whales, where the cementum is worn away on the tip of the tooth, does enamel show. Mysticetes have large whalebone, as opposed to teeth, made of keratin. Mysticetes have two blowholes ...