{"refrec":{"BRefID":230646,"RR":"<b>Lambert, O.; Gigase, P.</b> (2007). A monodontid cetacean from the Early Pliocene of the North Sea. <i>Bull. Kon. Belg. Inst. Natuurwet. Aardwet. = Bull. - Inst. r. sci. nat. Belg., Sci. Terre 77</i>: 197-210","BEntID":222363,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":null,"RefStringPartII":". <i>Bull. Kon. Belg. Inst. Natuurwet. Aardwet. = Bull. - Inst. r. sci. nat. Belg., Sci. Terre 77</i>: 197-210","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Lambert, O.; Gigase, P.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Lambert, O.; Gigase, P.","Englishabstract":"A partial skeleton from the Early Pliocene of Antwerp (north of Belgium), including a fragmentary skull, corresponds to the first record of a fossil member of the family Monodontidae in the North Sea. The vertex of the skull is lower than in the oldest known Monodontidae, the latest Miocene Denebola brachycephala, and the orbit is more anteriorly shifted. It differs from the two extant species of the family, the beluga Delphinapterus leucas and the narwhal Monodon monoceros, among others, in a shorter orbit and a shorter and wider antorbital notch. The anterior part of the temporal fossa is more elevated than in D. leucas and the rostrum lacked the modified pair of maxillary teeth of M. monoceros. Grooves observed at the surface of the skull bones are identified as shark teeth marks, either the result of a predation event or of scavenging. Several isolated ear bones from the Neogene of Antwerp are similarly referred to Monodontidae. The new specimens described here imply that members of the family migrated towards colder water before or during earliest Pliocene, well before the first Pleistocene records of Delphinapterus leucas in the North Sea. The palaeobiogeography of fossil Delphinidae, Monodontidae and Phocoenidae further suggests a Pacific origin for the crown- Delphinoidea of the North Atlantic realm.","AbstractOtherLang":"Un squelette partiel découvert dans le Pliocène inférieur d’Anvers (nord de la Belgique), comprenant un crâne fragmentaire, constitue la première mention d’un membre fossile de la famille Monodontidae en Mer du Nord. Le vertex du crâne est plus bas que sur le plus ancien Monodontidae connu, Denebola brachycephala, Miocène terminal, et l’orbite est positionnée plus antérieurement. Ce crâne diffère des deux espèces actuelles de la famille, le bélouga Delphinapterus leucas et le narval Monodon monoceros, par, entre autres, l’orbite plus courte et l’encoche antéorbitaire plus courte et plus large. La partie antérieure de la fosse temporale est plus élevée que chez D. leucas et le rostre ne comporte pas la paire de dents maxillaires modifiées de M. monoceros. Plusieurs sillons observés à la surface des os crâniens sont interprétés comme des marques de dents de requin, résultant soit d’un épisode de prédation, soit de l’action d’un charognard. Plusieurs os de l’oreille isolés du Néogène d’Anvers sont également attribués à un Monodontidae. Les nouveaux spécimens décrits ici indiquent que des membres de cette famille ont migré vers des eaux plus froides avant ou durant le Pliocène précoce, bien avant les premières mentions pléistocènes de Delphinapterus leucas dans la Mer du Nord. De plus, la paléobiogéographie des Delphinidae, Monodontidae et Phocoenidae fossiles suggère une origine pacifique pour les ‘crown-Delphinoidea’ de l’Atlantique Nord.","BibLvlCode":"AS","StandardTitle":"A monodontid cetacean from the Early Pliocene of the North Sea","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:32:52.928458","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"beluga, narwhal, Monodontidae, Pliocene, North Sea, palaeobiogeography","OtherDescriptors":null,"Notes":null,"AnaPub":2007,"MonPub":null,"DateUpdate":"2014-05-13","DateCreate":"2013-11-25","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000260409200015","VABBcode":null,"OpenAcc":1},"refs":null,"anarec":{"AnaID":230646,"PubliDate":2007,"Pagination":"197-210","XtraPublOfAnaID":null,"ISBN":null,"Volume":"77","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":64308,"SerRR":"Bulletin van het Koninklijk Belgisch Instituut voor Natuurwetenschappen. 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