{"refrec":{"BRefID":323124,"RR":"<b>Paolucci, F.; Buono, M.R.; Fernández, M.S.; Marx, F.G.; Cuitiño, J.I.</b> (2020). <i>Diaphorocetus poucheti</i> (Cetacea, Odontoceti, Physeteroidea) from Patagonia, Argentina: one of the earliest sperm whales. <i>J. Syst. Palaeontol. 18(4)</i>: 335-355. <a href=\"https://dx.doi.org/10.1080/14772019.2019.1605544\" target=\"_blank\">https://dx.doi.org/10.1080/14772019.2019.1605544</a>","BEntID":316595,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>J. Syst. Palaeontol. 18(4)</i>: 335-355. <a href=\"https://dx.doi.org/10.1080/14772019.2019.1605544\" target=\"_blank\">https://dx.doi.org/10.1080/14772019.2019.1605544</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Paolucci, F.; Buono, M.R.; Fernández, M.S.; Marx, F.G.; Cuitiño, J.I.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Paolucci, F. <i>et al.</i>","Englishabstract":"Sperm whales (Physeteroidea) are the basal-most surviving lineage of odontocetes, represented today by just three highly specialized, deep-diving suction feeders. By contrast, extinct sperm whales were relatively diverse, reflecting a major Miocene diversification into various suction feeding and macroraptorial forms. The beginnings of this diversification, however, remain poorly understood. The Atlantic coast of South America provides a crucial window into early physeteroid evolution and has yielded some of the oldest species known from cranial material, <i>Idiorophus patagonicus</i> and <i>Diaphorocetus poucheti</i> – both of which are in need of re-description and phylogenetic reappraisal. Here, we re-examine <i>Diaphorocetus</i> in detail and, in light of its complex taxonomic history, declare it a <i>nomen protectum</i>. Phylogenetically, the species forms part of a polytomy including ‘<i>Aulophyseter</i>’ <i>rionegresis</i> and the two crown lineages (Physeteridae and Kogiidae) and demonstrates that facial asymmetry and a clearly defined supracranial basin have characterized this lineage for at least 20 Ma. With a total body length of 3.5–4 m, <i>Diaphorocetus</i> is one of the smallest physeteroids yet known. Its cranial morphology hints at an intermediate raptorial/suction feeding strategy and it has a moderately developed spermaceti organ and junk.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"<i>Diaphorocetus poucheti</i> (Cetacea, Odontoceti, Physeteroidea) from Patagonia, Argentina: one of the earliest sperm whales","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-17 01:32:30.352829","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Physeteroidea; Gaiman Formation; phylogeny; anatomy; body size; Miocene","OtherDescriptors":null,"Notes":null,"AnaPub":2020,"MonPub":null,"DateUpdate":"2020-04-20","DateCreate":"2020-04-07","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000472964100001","VABBcode":null,"OpenAcc":0,"DOI":"10.1080/14772019.2019.1605544"},"refs":null,"anarec":{"AnaID":323124,"PubliDate":2020,"Pagination":"335-355","XtraPublOfAnaID":null,"ISBN":null,"Volume":"18","Issue":"4","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":144889,"SerRR":"Journal of Systematic Palaeontology. 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