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 ...

Other articles where Archaeoceti is discussed: cetacean: Paleontology: …whether the first cetaceans (archaeocetes) descended from an extinct group of large carnivores called mesonychids or from a group of hoofed herbivores (artiodactyls). The earliest archaeocetes were huge dolphinlike creatures 6 to 10 metres long. Basilosaurus (Zeuglodon) was an unusual genus that was up to 34 metres long ...

The Archaeoceti ('ancient whales'), or Zeuglodontes in older literature, is a group of primitive cetaceans.They lived from the early Eocene to the late Oligocene, 55–23 million years ago (mya). [1] They were the first cetacean radiation, and they include the first amphibious stages in cetacean evolution.So they are the ancestors of both …

Archaeoceti is a suborder of cetaceans that represent the ancestors of modern-day whales. The bone structure of these ancient whales, dating back 50 million years (Early Eocene), is very similar to their decendants. Archaeoceti lived throughout the Eocene and were the first evidence of adaptation to a fully aquatic lifestyle.

Possible relationships between cetaceans and other ungulate groups. [1] [7]The aquatic lifestyle of cetaceans first began in the Indian subcontinent from even-toed ungulates 50 million years ago, with this initial stage lasting approximately 4-15 million years. [8] Archaeoceti is an extinct parvorder of Cetacea containing ancient whales. The traditional hypothesis of …

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 (55 to 23 million years ago). Representing the earliest cetacean radiation, they include the initial amphibious stages in cetacean evolution, thus are the ancestors of both modern …

Archaeoceti Flower, 1883 . Protocetidae Stromer, 1908 . Georgiacetinae Gingerich et al., 2005 . Georgiacetines, like protocetines, have generalized protocetid skulls retaining three incisors in the premaxilla and three molars in the maxilla. Posterior thoracic, lumbar, sacral and proximal caudal vertebrae of georgiacetines are longer relative ...

Skeletal remains of Eocene Archaeoceti provide the only direct and unequivocal evidence of the evolutionary transition of whales from land to sea. Archaeocete skeletons complete enough to be informative about locomotion are rare (principally Rodhocetus and Dorudon), and these deserve to be studied in comparison to the full spectrum of ...

2018年6月8日 · Archaeoceti (ancient whales; cohort Mutica, order Cetacea) An extinct suborder comprising the oldest and most primitive cetaceans, which flourished in the Eocene and may have originated in Africa. Most were comparable in size with modern porpoises, had an elongated snout, and nostrils on top of the skull. The brain case was long and low.

This category contains all articles about primitive whales of the paraphyletic group Archaeoceti. Subcategories. This category has the following 5 subcategories, out of 5 total. A. Ambulocetidae (4 P) B. Basilosauridae (23 P) P. Pakicetidae (5 P) …