Delphinida

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Delphinida
Temporal range: Oligocene to Recent [1]
Commdolph01.jpg
A Commerson's dolphin
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Infraorder: Cetacea
Parvorder: Odontoceti
Clade: Delphinida
Muizon, 1984
Superfamilies

Delphinoidea
Inioidea
Lipotoidea

Delphinida is a clade of cetaceans in the parvorder Odontoceti, the toothed whales. It includes all modern oceanic dolphins, porpoises, and their relatives, such as Lipotidae [2] and Iniidae. [3] [1] [4] [5]

Short-beaked common dolphin (Delphinus delphis) Delphinus delphis with calf.jpg
Short-beaked common dolphin (Delphinus delphis)

Related Research Articles

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<span class="mw-page-title-main">Lipotidae</span> Family of river dolphins

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<i>Odobenocetops</i> Extinct genus of mammals

Odobenocetops is an extinct genus of small toothed whale known from Chile and Peru. Its fossils are found in Miocene-aged marine strata of the Bahía Inglesa Formation and Pisco Formation. Two species of Odobenocetops are currently recognized, O. peruvianus and the slightly younger O. leptodon.

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<span class="mw-page-title-main">Cetotheriidae</span> Family of mammals

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Hadrokirus is an extinct genus of true seal (Phocidae) that lived on the coast of Peru and North Carolina about 6 million years ago. The type species, H. martini, was found in the Pisco Formation, together with other marine animals such as crustaceans, sharks, coastal birds, whales and aquatic sloths. The distinguishing feature of the seal was its teeth: they were extremely robust, hence the name. It is assumed that Hadrokirus martini was durophagous; its diet probably comprised crustaceans, small bivalves and other shelled animals, similar to that of the living sea otter. The living seals most closely related to Hadrokirus are the Antarctic seals.

<span class="mw-page-title-main">Pisco Formation</span> Geologic formation in Peru

The Pisco Formation is a geologic formation located in Peru, on the southern coastal desert of Ica and Arequipa. The approximately 640 metres (2,100 ft) thick formation was deposited in the Pisco Basin, spanning an age from the Late Miocene up to the Early Pliocene, roughly from 9.6 to 4.5 Ma. The tuffaceous sandstones, diatomaceous siltstones, conglomerates and dolomites were deposited in a lagoonal to near-shore environment, in bays similar to other Pacific South American formations as the Bahía Inglesa and Coquimbo Formations of Chile.

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<span class="mw-page-title-main">Aetiocetidae</span> Extinct family of mammals

Aetiocetidae is an extinct family of toothed baleen whales known from the Oligocene and latest Eocene, so far only from rocks deposited in the North Pacific Ocean. The whales ranged in size from 3 to 8 metres long. Many of the described specimens were discovered from the Upper Oligocene of the Japanese Morawan Formation, the largest known one from the Morawan's Upper tuffaceous siltstone. Other formally described extinct toothed mysticetis from this time are smaller, from 3 to 4 metres in length. Mysticeti with true baleen are seen in fossils from the Upper Oligocene. The monophyly of the family is still uncertain, as are the evolutionary relationship between the early toothed baleen whales and the early and extant edentulous baleen whales. However, the cladistic analyses of Coronodon and Mystacodon seem to indicate that Aetiocetidae and Llanocetidae are more closely related to crown Mysticeti than to Mammalodontidae, Coronodon, and Mystacodon.

Mystacodon is a genus of toothed baleen whale from the Late Eocene Yumaque Member of Paracas Formation of the Pisco Basin in southwestern Peru. It is the oldest known baleen whale, and was probably a suction feeder of small prey on the seafloor.

Liolithax is an extinct genus of dolphin from the Middle Miocene (Serravallian) Temblor Formation of California.

<i>Lophocetus</i> Extinct genus of dolphins

Lophocetus is an extinct genus of dolphin belonging to the clade Delphinida that is known from late Miocene (Tortonian) marine deposits in California and Maryland. Although usually placed in Kentriodontidae, recent studies have found it only distantly related to Kentriodon.

Hadrodelphis is an extinct genus of dolphin once assigned to the paraphyletic/polyphyletic family Kentriodontidae. Remains have been found in the middle Miocene (Langhian) Calvert Formation of United States.

Saurocetes is an extinct genus of probable iniid river dolphins from South America. Two species have been described: S. argentinus and S. gigas. It has been suggested that Saurocetes is a synonym of the possible platanistid Ischyrorhynchus.

References

  1. 1 2 "Infraorder Delphinida Muizon 1984 (toothed whale)". paleobiodb.org.
  2. "Family Lipotidae Zhou et al. 1978 (toothed whale)". PBDB.
  3. "Family Iniidae Gray 1846". PBDB.
  4. "Family Platanistidae Gray 1846". PBDB.
  5. Muizon, C. (1984). "Les vertebres fossiles de la Formation Pisco (Perou) II: Les Odontocetes (Cetacea, Mammalia) du Pliocene inferieur de Sud-Sacaco". Institut Français d'Études Andines Éditions Recherche sur les Civilizations Mémoire. 50: 1–188.