italictitle Taxobox fossil range Oligocene image Aetiocetus BW.jpg image caption Aetiocetus cotylalveus regnum Animal ia phylum Chordate Chordata classis Mammal ia ordo Cetacea subordo Mysticeti familia Aetiocetidae genus Aetiocetus genus authority Douglas Emlong Emlong 1966 type species A. cotylalveus , small Douglas Emlong Emlong , 1966 small subdivision ranks Species subdivision A. cotylalveus A. polydentatus A. tomitai A. weltoni Aetiocetus is an extinct genus of baleen whale that lived 25 million years ago, in the Oligocene period. Its fossils have been found in the North Pacific , ref name OAM cite web url http www.otago.ac.nz geology features paleontology whales.htm title The Origins and Adaptations of Mysticetes publisher Robert Ewan Fordyce date 1998 06 07 accessdate 2008 06 29 archiveurl http web.archive.org web 20080628030851 http www.otago.ac.nz geology features paleontology whales.htm Bot retrieved archive archivedate 2008 06 28 ref around Oregon . It was first named by Douglas Emlong in 1966 and currently contains four species, A cotylalveus , A. polydentatus , A. tomitai , and A. weltoni . Description Aetiocetus is a transitional fossil between early whales and the modern whales, its blowhole being located halfway up its snout rather than at the top of its head. ref cite web url http evolution.berkeley.edu evosite lines IAtransitional.shtml title Lines of Evidence Transitional Forms 1 of 2 accessdate 2008 04 26 work Understanding Evolution publisher Berkeley University ref It is also one of the earliest known baleen whales. ref name Enchanted cite web url http ... on June 29th, 2008. ref had a loose jaw like later baleen whales. ref name Enchanted Aetiocetus ... NA Aetiocetus most likely fed on fish and crustaceans . ref name NA Douglas Emlong originally classified ... mammals of North America Category Transitional fossil paleo whale stub portal Paleontology it Aetiocetus ru Aetiocetus zh ... more details
Taxobox name Ashorocetus fossil range Oligocene image image width image caption regnum Animal ia phylum Chordate Chordata classis Mammal ia ordo Cetacea familia Aetiocetidae genus Ashorocetus genus authority Barnes 1995 type species A. eguchii subdivision ranks Species subdivision A. eguchii Ashorocetus is an extinct genus of Aetiocetidae . It was first named by L.G. Barnes et al. in 1995, and contains one species, A. eguchii . Sister Taxa Aetiocetus Chonecetus Morawanocetus Willungacetus Sources The Rise of Placental Mammals By Kenneth David Rose and J. David Archibald ISBN 080188022X http paleodb.org cgi bin bridge.pl?action checkTaxonInfo&taxon no 63477&is real user 0 paleodb.org Category Cetaceans Category Prehistoric cetaceans Category Oligocene mammals paleo whale stub ... more details
Taxobox name Willungacetus ref Pledge ref fossil range Oligocene image image width image caption regnum Animal ia phylum Chordate Chordata classis Mammal ia ordo Cetacea familia Aetiocetidae genus Willungacetus genus authority Pledge 2005 type species W. aldingensis subdivision ranks Species subdivision W. aldingensis Willungacetus is an extinct genus of Aetiocetidae which existed during the Oligocene period. Its fossils have been found in Australia . ref name SA Museum cite web url http www.samuseum.sa.gov.au page default.asp?site 1&id 1202&fragPage 1 title South Australia Museum Objects of Interest publisher www.samuseum.sa.gov.au accessdate 2008 07 03 ref It was first named by Pledge in 2005, though he had discovered it at Port Willunga in 2001, ref name SA Museum and contains one species, W. aldingensis . It is the oldest known whale from Australia, ref name SA Museum and the only Aetiocetid from Australia. Sister Taxa Aetiocetus Ashorocetus Chonecetus Morawanocetus References reflist External links http paleodb.org cgi bin bridge.pl?action checkTaxonInfo&taxon no 67021&is real user 0 Paleobiology Database http zipcodezoo.com Key Willungacetus Genus.asp Willungacetus at Zipcodezoo.com Category Prehistoric cetaceans Category Oligocene mammals paleo whale stub ... more details
Taxobox name Morawanocetus ref Barnes et al. ref fossil range Oligocene image image width image caption regnum Animal ia phylum Chordate Chordata classis Mammal ia ordo Cetacea familia Aetiocetidae genus Morawanocetus genus authority Barnes et al. 1995 type species M. yabukii subdivision ranks Species subdivision M. yabukii Morawanocetus is an extinct genus of Aetiocetidae from the Oligocene period. ref name Vert Paleo cite web url http www.vertpaleo.org publications jvp supplemental data 26 3 SVP2006Abstracts.pdf title The Family Aetiocetidae as a Model For Evolution of Stem Mysticeti publisher Lawrence Barnes, Natural History Museum of Los Angeles County, Los Angeles, CA, and James Goedert, Univ. of Washington, Wauna, WA date 2006 09 accessdate 2008 07 03 ref Its fossils have been found in the North Pacific . ref name Vert Paleo It was first named by Barnes et al. in 1995, and contains one species, M. yabukii . Morawanocetus was divergent, with wide crania, elaborate cheek, tooth crowns, and short necks. ref name Vert Paleo Sister Taxa Aetiocetus Ashorocetus Chonecetus Willungacetus References reflist Suggested further reading Marine mammals evolutionary biology By Annalisa Berta, James L. Sumich, and Kit M. Kovacs. Published 2005, Academic Press . ISBN 0120885522 External links http paleodb.org cgi bin bridge.pl?action checkTaxonInfo&taxon no 63479&is real user 0 Paleobiology Database http zipcodezoo.com Key Morawanocetus Genus.asp Morawanocetus at Zipcodezoo.com Category Prehistoric cetaceans Category Oligocene mammals paleo whale stub ... more details
inherited from their ancestors, as opposed to baleen, in modern species. The Oligocene species AetiocetusAetiocetus cotylalveus is considered the evolutionary link between toothed whales toothed and baleen ..., AetiocetusAetiocetus weltoni . The scientists involved indicated that this discovery implies ... extinct families and genera. Suborder Mysticeti Baleen whales Family Aetiocetidae Aetiocetus Ashorocetus ... more details
Douglas Ralph Emlong April 17, 1942 June 1980 was an amateur fossil collector from the Oregon Coast in the northwestern United States . His collections contributed to the discovery and description of numerous extinct marine mammal species , many of which are ancestral to extant taxon extant groups. Described as an indefatigable ref cite web title An unusual small pug nosed dolphin, Simocetus rayi, from Oligocene rocks of the northeastern Pacific work Department of Geology, University of Otago, New Zealand year 2007 month November url http www.otago.ac.nz geology features paleontology simocetus rayi.html ref fossil collector with Promethian prowess in discovery of unprecedented vertebrate fossils ref cite book title Two new Oligocene desmostylians and a discussion of tethytherian systematics author Daryl P. Domning, Clayton Edward Ray, Malcolm C. McKenna ref , he contributed substantially to the field from the age of fourteen. The ancestral pinniped Enaliarctos emlongi was named in his honor by Annalisa Berta in 1991. ref cite book title New Enaliarctos Pinnipedimorpha from the Oligocene and Miocene of Oregon and the role of Enaliarctids in Pinniped phylogeny author Annalisa Berta ref Discoveries Fossils discovered by Douglas Emlong include Marine Mammals Aetiocetus cotylalveus , an early, toothed relative of baleen whales and evolutionary link between ancient and modern cetaceans Simocetus , a genus of bottom feeding pug nosed whales which may have had comparable animal echolocation echolocation abilities to modern toothed whales Behemotops , a genus of primitive, elephant like desmostylia ns A remarkably complete skeleton of Enaliarctos , a late Oligocene pinniped ancestor, from Pyramid Hill, California The first complete skull of Kolponomos , a relative of Ursidae bears specialized in diving for mollusks , which was previously thought to be a Procyonidae raccoon ancestor Birds Tonsala Tonsala hildegardae , a late Oligocene Pelecaniformes pelicaniform which proved ... more details
41 33 Ma Genus Dorudon Image Dorudon atrox Senckenberg.jpg 150px 25 Ma Genus Aetiocetus Image Aetiocetus BW.jpg 150px 40 34 Ma Genus Basilosaurus Image Basilosaurus skeleton.jpg 150px 8 15 Ma Genus ... more details
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