Squalodontidae

Squalodontidae Temporal range: Late Oligocene–Middle Miocene PreꞒ Ꞓ O S D C P T J K Pg N

Squalodon
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Artiodactyla
Infraorder:	Cetacea
Superfamily:	Platanistoidea
Family:	†Squalodontidae Brandt 1873
Genera^[1]
Eosqualodon Rothausen 1968 Neosqualodon Dal Piaz, 1904 Squalodon Grateloup 1840 ?Tangaroasaurus Benham 1935 ?Phoberodon Cabrera, 1926

Squalodontidae or the shark-toothed dolphins is an extinct family of large toothed whales who had long narrow jaws.^[2] Squalodontids are known from all continents except Antarctica, from the Oligocene to the Neogene, but they had a maximal diversity and global distribution during the Late Oligocene and Early to Middle Miocene (28 to 15 mya).^[2]^[1]

With their cosmopolitan Miocene distribution and heterodont dentition, squalodontids are the most common and basal platanistoids. They are relatively large odontocetes, comparable in size to extant mesoplodont whales. The premaxillae on their elongated rostrum have large and slightly convex fossae for the air sacs associated with the presence of a melon, indicating the ability for echolocation.^[3]

Squalodon and Eosqualodon are based on partial or complete skulls. The synapomorphic traits of the family are, however, based mostly on one of the bones of the inner ear, the periotic bone, which is unknown in these genera except in Squalodon. The monophyly of the family is, therefore, uncertain. Patriocetus has also been included.^[3]

Some squalodontids are known from rather complete fossils, but most were described based on a few isolated teeth. Squalodontids are most likely very distantly related to extant oceanic dolphins but, according to French palaeontologist Christian de Muizon, more closely related to the South Asian river dolphin (Platanista gangetica).^[2]

The genus Squalodon was named by French naturalist Jean-Pierre Sylvestre de Grateloup in 1840^[4] based on a jaw fragment he thought belonged to a reptile. Fossils discovered later, nevertheless, showed that this was a toothed whale. In extant odontocetes, however, the dentition is atavistic with all teeth reduced to simple, undifferentiated conical shapes. In squalodonts the teeth resemble those of the archaic whales, Archaeoceti, with conical incisors anteriorly and low-crowned, serrated teeth posteriorly.^[2]

References

Notes

^ ^a ^b "†family Squalodontidae Brandt 1873 (toothed whale)". Fossilworks. Retrieved 17 December 2021.
^ ^a ^b ^c ^d Fordyce, R Ewan (June 2018). "Shark-toothed dolphins (Family Squalodontidae)". University of Otago, Department of Geology.
^ ^a ^b Muizon 2008, p. 980
^ Grateloup 1840

Sources

Brandt, J. F. (1873). "Untersuchungen über die fossilen und subfossilen Cetaceen Europa's". Mémoires de l'Académie Impériale des Sciences de Saint-Petersbourg. 7 (in German). 20 (1): 1–372. Retrieved 17 December 2021.
- "J. F. Brandt 1873". Fossilworks.
Grateloup, J.-P. S. (1840). "Description d'un fragment de machoire fossile, d'un genre nouveau de reptile (Saurien), de taille gigantesque, voisin de l'Iguanodon, trouvé dans le Grès marin, à Léognan, près Bordeaux (Gironde)". Actes de l'Académie nationale des sciences, belles-lettres et arts de Bordeaux. 2: 201–210. Retrieved 17 December 2021.
- "J. P. S. Grateloup 1840". Fossilworks.
Muizon, C. (2008). "River Dolphins, Evolutionary: History and Affinities". In Perrin, W. F.; Würsig, B.; Thewissen, J. G. M. (eds.). Encyclopedia of Marine Mammals (2nd ed.). Academic Press. pp. 979–986. ISBN 978-0-12-373553-9.

Odontocete genera

Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Infraorder: Cetacea

Odontoceti

†Agorophius †Ankylorhiza †Archaeodelphis †Argyrocetus †Ashleycetus †Caolodelphis †Chilcacetus †Enigmatocetus †Eoplatanista †Inticetus †Macrodelphinus †Microcetus †Mirocetus †Neosqualodon †Olympicetus †Papahu †Patriocetus †Phoberodon †Phococetus †Prosqualodon †Sachalinocetus †Simocetus †Sulakocetus †Tangaroasaurus
†Xenorophidae	Albertocetus Cotylocara Echovenator Inermorostrum Xenorophus
†Waipatiidae	Awamokoa Ediscetus Nihohae Nihoroa Otekaikea Urkudelphis Waipatia
†Squalodontidae	Eosqualodon Squalodon
†Squaloziphiidae	Crisocetus? Squaloziphius Yaquinacetus
†Eurhinodelphinidae	Ceterhinops Eurhinodelphis Iniopsis Mycteriacetus Phocaenopsis Schizodelphis Vanbreenia Xiphiacetus Ziphiodelphis
Crown-Odontoceti	see below↓

Crown-Odontoceti

Physeteroidea

†Acrophyseter †Albicetus †Brygmophyseter †Eudelphis †Hoplocetus †Livyatan †Miophyseter †Rhaphicetus †Scaldicetus †Zygophyseter
Kogiidae	†Aprixokogia Kogia †Koristocetus †Nanokogia †Platyscaphokogia †Pliokogia †Praekogia †Scaphokogia †Thalassocetus?
Physeteridae	†Aulophyseter †Cozzuoliphyseter †Diaphorocetus †Idiophyseter †Idiorophus †Orycterocetus Physeter †Physeterula †Placoziphius †Thalassocetus?

Platanistoidea

†Aondelphis †Dolgopolis †Ensidelphis †Perditicetus †Eurhinodelphinidae? †Squalodontidae? †Waipatiidae?
†Allodelphinidae?	Allodelphis Arktocara Goedertius Ninjadelphis Zarhinocetus
†Squalodelphinidae?	Furcacetus Huaridelphis Macrosqualodelphis Medocinia Notocetus Phocageneus Squalodelphis
Platanistidae	†Araeodelphis †Dilophodelphis †Grimadelphis †Pachyacanthus? †Pebanista Platanista †Pomatodelphis †Prepomatodelphis †Zarhachis?

Ziphiidae

†Aporotus †Beneziphius †Caviziphius †Chavinziphius †Chimuziphius †Choneziphius †Dagonodum †Globicetus †Imocetus †Messapicetus †Nazcacetus †Nenga †Ninoziphius †Notoziphius †Pterocetus Tasmacetus †Tusciziphius †Xhosacetus †Ziphirostrum
Berardiinae	†Archaeoziphius Berardius †Microberardius
Ziphiinae	†Izikoziphius Ziphius
Hyperoodontinae	†Africanacetus Hyperoodon †Ihlengesi Indopacetus Mesoplodon

Delphinida	see below↓

Delphinida

†Albireo †Atocetus †Brevirostrodelphis †Cammackacetus †Delphinodon †Hadrodelphis †Herbeinodelphis †Liolithax †Lophocetus †Macrokentriodon †Miminiacetus †Odobenocetops †Pictodelphis †Pithanodelphis †Tagicetus †Westmorelandelphis
†Kentriodontidae	Belonodelphis? Kampholophos Kentriodon Platysvercus Sophianacetus Rudicetus Wimahl
Lipotidae	Lipotes †Parapontoporia †Prolipotes

Inioidea

†Awadelphis
Iniidae	†Brujadelphis †Goniodelphis Inia †Ischyrorhynchus †Isoninia? †Isthminia †Kwanzacetus †Meherrinia †Plicodontinia †Saurocetes
Pontoporiidae	†Atocetus? †Auroracetus †Brachydelphis †Piscorhynchus †Pliopontos †Pontistes †Protophocaena †Samaydelphis †Scaldiporia †Stenasodelphis Pontoporia

Delphinoidea

Monodontidae	†Bohaskaia †Casatia Delphinapterus †Denebola †Haborodelphis Monodon
Phocoenidae	†Archaeophocaena †Australithax †Haborophocoena †Lomacetus †Miophocaena Neophocaena †Numataphocoena Phocoena Phocoenoides †Piscolithax †Pterophocaena? †Semirostrum †Septemtriocetus

Delphinidae

†Arimidelphis †Australodelphis †Eodelphinus †Etruridelphis †Hemisyntrachelus Lagenorhynchus †Norisdelphis Orcinus †Platalearostrum †Pliodelphis †Pterophocaena?
Lissodelphininae	Cephalorhynchus Lissodelphis
Delphininae	Delphinus Lagenodelphis Sotalia Sousa Stenella Tursiops
Globicephalinae	Feresa Globicephala Grampus Orcaella Peponocephala Pseudorca Steno

This prehistoric cetacean-related article is a stub. You can help Wikipedia by expanding it.

Read other articles:

François Angelier

Artikel ini sebatang kara, artinya tidak ada artikel lain yang memiliki pranala balik ke halaman ini.Bantulah menambah pranala ke artikel ini dari artikel yang berhubungan atau coba peralatan pencari pranala.Tag ini diberikan pada Desember 2023. François Angelier pada bulan Maret 2010 François Angelier, lahir pada tanggal 22 Agustus 1958,[1] merupakan jurnalis Prancis, presenter, penulis esai dan biografi serta novel fantasi.[2] Biografi Penemuan awal Angelier tentang Owen, ...

Rawang, Selangor

For the federal constituency formerly represented in the Dewan Rakyat, see Rawang (federal constituency). This article does not cite any sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Rawang, Selangor – news · newspapers · books · scholar · JSTOR (September 2014) (Learn how and when to remove this template message) Town in Selangor, MalaysiaRawangTownOthe...

Harold Arlen

American composer of popular music (1905–1986) Not to be confused with Harold Arlin. Harold ArlenArlen in 1960BornHyman Arluck(1905-02-15)February 15, 1905Buffalo, New York, U.S.DiedApril 23, 1986(1986-04-23) (aged 81)New York City, U.S.Resting placeFerncliff CemeteryOccupationComposerSpouse Anya Taranda (m. 1937; died 1970)ChildrenAdopted his brother's son in 1985[1] Harold Arlen (born Hyman Arluck; February 15, 1905 – Apri...

Siaran tunda

Bagian dari seri tentangSensor Pada media Melarang buku-buku · Film yang dilarang Penyuntingan kembali film · Internet · Musik Pers · Radio · Berpikir Berbicara dan berekspresi Permainan video Metode Bunyi bip · Pembakaran buku Siaran tunda · Efek pedingin Konspirasi hening Perangkat lunak pengawasan isi Eufemisme · Penghilangan bagian buku Pembungkaman · Pengejek Rongga memori · ...

El Cid

Artikel ini tidak memiliki referensi atau sumber tepercaya sehingga isinya tidak bisa dipastikan. Tolong bantu perbaiki artikel ini dengan menambahkan referensi yang layak. Tulisan tanpa sumber dapat dipertanyakan dan dihapus sewaktu-waktu.Cari sumber: El Cid – berita · surat kabar · buku · cendekiawan · JSTOR Patung El Cid di Burgos. Rodrigo (atau Ruy) Díaz de Vivar (lahir di Vivar (Burgos) tahun 1044 M - meninggal di Valencia, 10 Juli 1099), dikenal...

Thursday Night Football

Branding for NFL games usually broadcast on Thursdays This article is about broadcasts of National Football League games on Thursdays. For NFL Network games on Saturday, see NFL Network Exclusive Game Series. For Canadian Football League games, see CFL on TSN. For ESPN's coverage of college football, see ESPN College Football Thursday Primetime. This article may require cleanup to meet Wikipedia's quality standards. The specific problem is: Long unsourced lead, maybe a split could be useful? ...

Абсхаген, Роберт

В Википедии есть статьи о других людях с фамилией Абсхаген. Роберт Абсхагеннем. Robert Abshagen Дата рождения 12 января 1911(1911-01-12) Место рождения Гамбург, Германская империя Дата смерти 10 июля 1944(1944-07-10) (33 года) Место смерти Гамбург, Нацистская Германия Гражданство Герм�...

فترة مصرية انتقالية ثالثة

فترة مصرية انتقالية ثالثة 1069 ق.م – 664 ق.م عاصمة تانيس (1069 ق.م - 945 ق.م) الأسرة الحادية والعشرون طيبة (945 ق.م - 720 ق.م) الأسرة الثانية والعشرون إهناسيا (837 ق.م - 728 ق.م) الأسرة الثالثة والعشرون سايس (732 ق.م - 720 ق.م) الأسرة الرابعة والعشرون نبتة (732 ق.م - 664 ق.م) الأسرة الخامسة والعشرون ن�...

西遊記大結局之仙履奇緣

本條目存在以下問題，請協助改善本條目或在討論頁針對議題發表看法。此條目需要編修，以確保文法、用詞、语气、格式、標點等使用恰当。 (2013年8月6日)請按照校對指引，幫助编辑這個條目。（幫助、討論）此條目剧情、虛構用語或人物介紹过长过细，需清理无关故事主轴的细节、用語和角色介紹。 (2020年10月6日)劇情、用語和人物介紹都只是用於了解故事主軸，輔助�...

Meynes

Meynes Mairie Blason Administration Pays France Région Occitanie Département Gard Arrondissement Nîmes Intercommunalité Communauté de communes du Pont du Gard Maire Mandat Fabrice Fournier 2020-2026 Code postal 30840 Code commune 30166 Démographie Populationmunicipale 2 572 hab. (2021 ) Densité 154 hab./km2 Géographie Coordonnées 43° 53′ 00″ nord, 4° 33′ 43″ est Altitude Min. 11 mMax. 78 m Superficie 16,66 km2 Typ...

Antonio María Pico

Antonio María PicoAlcalde of San JoséIn office1835Preceded byPedro ChaboyaSucceeded byJosé María AlvisoIn office1844–1845Preceded byJuan Salvio Pacheco IISucceeded byJohn Burton Personal detailsBorn1808Monterey, CaliforniaDied23 May 1869San José, CaliforniaProfessionPolitician, ranchero Don Antonio María Pico was a Californio politician, ranchero, and a signer of the California Constitution in 1849.[1] He also served twice as Alcalde of San José.[2] Biography Antonio...

Senufo languages

Language family of West Africa This article includes inline citations, but they are not properly formatted. Please improve this article by correcting them. Parenthetical referencing has been deprecated; convert to shortened footnotes. (June 2022) (Learn how and when to remove this message) SenufoSenoufoGeographicdistributionnorthern Ivory Coast, southern Mali, southwestern Burkina Faso, western GhanaLinguistic classificationNiger–Congo?Atlantic–CongoSenufoSubdivisions Suppire–Mamara Kar...

2010 Major League Baseball draft

Baseball draft of amateur players 2010 Major League Baseball draftGeneral informationDate(s)June 7–9, 2010LocationSecaucus, New JerseyNetwork(s)MLB NetworkOverview1525 total selectionsFirst selectionBryce HarperWashington NationalsFirst round selections50← 20092011 → The 2010 Major League Baseball draft was held on June 7–9, 2010 at the MLB Network Studios in Secaucus, New Jersey. First-round selections The draft order was determined based on the 2009 MLB standings, ...

Parley Baer

American actor (1914–2002) Parley BaerBaer in an episode of The Public Defender (1954)BornParley Edward Baer(1914-08-05)August 5, 1914Salt Lake City, Utah, U.S.DiedNovember 22, 2002(2002-11-22) (aged 88)Los Angeles, California, U.S.Resting placeForest Lawn Memorial Park - Hollywood Hills CemeteryOccupationActorYears active1940–1997Spouse Ernestine Clarke (m. 1946; died 2000)Children2Military careerAllegiance United StatesS...

Matthieu Fontaine

Artikel ini sebatang kara, artinya tidak ada artikel lain yang memiliki pranala balik ke halaman ini.Bantulah menambah pranala ke artikel ini dari artikel yang berhubungan atau coba peralatan pencari pranala.Tag ini diberikan pada September 2016. Matthieu Fontaine RC Lens - Red Star, 2018Informasi pribadiTanggal lahir 9 April 1987 (umur 37)Tempat lahir La Bassée, PrancisTinggi 1,86 m (6 ft 1 in)Posisi bermain BekInformasi klubKlub saat ini Stade ReimsNomor 29Karier senior...

A1 Ethniki

Disambiguazione – Se stai cercando il massimo campionato della Grecia di pallacanestro femminile, vedi A1 Ethniki (pallacanestro femminile). A1 EthnikiSport Pallacanestro TipoSquadre di club FederazioneHEBA Paese Grecia Organizzatorecampionato greco di pallacanestro TitoloCampione di Grecia CadenzaAnnuale Aperturaottobre Chiusuragiugno Partecipanti12 squadre FormulaStagione regolare A/RPlayoff, Finale Retrocessione inA2 Ethniki Sito InternetEsake.grBasket.gr StoriaFondazione1928 Deten...

Open-source governance

School of thought advocating free access to lawmaking for the people This article relies excessively on references to primary sources. Please improve this article by adding secondary or tertiary sources. Find sources: Open-source governance – news · newspapers · books · scholar · JSTOR (June 2011) (Learn how and when to remove this message) Part of a series onGovernance Models Algorithmic Bad Collaborative Electronic Good Multistakeholder Open-source P...

École nationale de la statistique et de l'analyse de l'information

Si ce bandeau n'est plus pertinent, retirez-le. Cliquez ici pour en savoir plus. Le ton de cet article est trop promotionnel ou publicitaire (mars 2024). Vous êtes invité à améliorer l'article de manière à adopter un ton neutre (aide quant au style) ou discutez-en. Vous pouvez également préciser les sections non neutres en utilisant {{section promotionnelle}} et de souligner les passages problématiques avec {{passage promotionnel}}. Si ce bandeau n'est plus pertinent, retirez-le. Cli...

Miss Polonia 2010

Beauty pageant Miss Polonia 2010DateDecember 11, 2010PresentersAgnieszka SzulimMaciej MiecznikowskiEntertainmentNorbiVideoIwona WęgrowskaBlue CaféVenueEXPO Hall, ŁódźBroadcasterTVPEntrants18Placements12WithdrawalsLubuszWarmia-MasuriaAustraliaSwedenWinnerRozalia Mancewicz Podlaskie← 20092011 → Miss Polonia 2010 was the 36th Miss Polonia pageant, held at the EXPO Hall in Łódź, Poland, on December 11, 2010. The winner was Rozalia Mancewicz of Podlaskie and she ...

William Beardmore and Company

British engineering and shipbuilding company William Beardmore and Company, Ltd.Company typeLimited companyIndustrySteelmaking, heavy engineering, shipbuilding, locomotive building, ordnance manufacture, automotive, aviationFounded1887Defunct1983 (Closure of Parkhead Forge)FatedissolvedHeadquartersParkhead, GlasgowDalmuir, ClydebankKey peopleWilliam BeardmoreProductsCastings, Forgings, Oil Tankers, Naval ships, Steam locomotives, Fixed-wing aircraft, Airships, Automobiles, Motorcycles William...