{"refrec":{"BRefID":249712,"RR":"<b>Jagt, J.W.M.; Donovan, S.K.; Deckers, M.J.M.; Dortangs, R.W.; Kuypers, M.M.M.; Veltkamp, C.J.</b> (1998). The Late Maastrichtian bourgueticrinid crinoid <i>Dunnicrinus aequalis</i>\r\n(D'Orbigny, 1841) from The Netherlands and Belgium. <i>Bull. Kon. Belg. Inst. Natuurwet. Aardwet. = Bull. - Inst. r. sci. nat. Belg., Sci. Terre 68</i>: 129-154","BEntID":241411,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":null,"RefStringPartII":". <i>Bull. Kon. Belg. Inst. Natuurwet. Aardwet. = Bull. - Inst. r. sci. nat. Belg., Sci. Terre 68</i>: 129-154","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Jagt, J.W.M.; Donovan, S.K.; Deckers, M.J.M.; Dortangs, R.W.; Kuypers, M.M.M.; Veltkamp, C.J.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Jagt, J.W.M. <i>et al.</i>","Englishabstract":"The bourgueticrinid <i>\"Bourgueticrinus\" aequalis</i> D'ORBIGNY, 1841 is by far the commonest Late Cretaceous crinoid species in the type area of the Maastrichtian Stage (NE Belgium, SE Netherlands). Many hundreds of thousands of dissociated ossicles, of crowns and columns alike, have been collected during recent years. Based on the Structure of the crown (number of arms and brachial articulation types), the species is best reclassified in the otherwise exclusively North American genus <i>Dunnicrinus</i> MOORE, 1967. It is particularly well represented in the Lanaye (Gulpen Formation), Valkenburg and Gronsveld (Maastricht Formation) Members, of Late Maastrichtian age. Rare occurrences of more or less completely preserved specimens, the result of obrution, have been given special attention. Material from one such crinoid \"lagerstätte\" from the base of the Gronsveld Member as exposed at the ENCI Nederland BV quarry, which includes attachment structures of unusual complexity with stereom overgrowths, is here described. This particular lagerstätte closely resembles that which yielded the Late Maastrichtian type species of the genus <i>Dunnicrinus, D. mississippiensis</i> MOORE, 1967. from the southern U.S.A.","AbstractOtherLang":"Le bourgueticrinidé <i>\"Bourgueticrinus\" aequalis</i> D'ORBIGNY, 1841 est de loin l'espèce de crinoïde du Crétacé supérieur la plus commune dans la région-type de l'étage Maastrichtien (NE de la Belgique, SE des Pays-Bas). Plusieurs centaines de milliers d'ossicules dissociés, de calices et de tiges ont été récoltés au cours des dernières années. Sur base de la structure du calice (nombre de bras et types d'articulation brachiale), l'espèce est attribuée de façon plus appropriée à <i>Dunnicrinus</i> MOORE, 1967, un genre par ailleurs exclusivement nord-américain. L'espèce est particulièrement bien représentée dans les Membres de Lanaye (Formation de Gulpen). de Valkenburg et de Gronsveld (Formation de Maastricht), d'âge Maastrichtien supérieur. De rares occurrences de spécimens plus ou moins complètement préservés, résultat d\"obrution\", ont fait l'objet d'une attention particulière. Le matériel provenant d'un tel \"lagerstätte\" à crinoïdes de la base du Membre de Gronsveld tel qu'il est exposé à la carrière ENCI Nederland BV, est décrit; il comprend des structures d'attachement d'une complexité inhabituelle avec surcroissance du stéréome. Ce \"lagerstätte\" particulier ressemble étroitement à celui d'où provient l'espèce-type du genre <i>Dunnicrinus, D. mississipiensis</i> MOORE, 1967, du sud est des U.S.A.","BibLvlCode":"AS","StandardTitle":"The Late Maastrichtian bourgueticrinid crinoid <i>Dunnicrinus aequalis</i>(D'Orbigny, 1841) from The Netherlands and Belgium","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2025-07-02 08:58:19.190595","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Crinoidea, Bourgueticrinidae, lagerstätte, Late Maastrichtian, The Netherlands, Belgium, Maastrichtien supérieur, Pays-Bas, Belgique ","OtherDescriptors":null,"Notes":null,"AnaPub":1998,"MonPub":null,"DateUpdate":"2015-09-07","DateCreate":"2015-09-07","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1},"refs":null,"anarec":{"AnaID":249712,"PubliDate":1998,"Pagination":"129-154","XtraPublOfAnaID":null,"ISBN":null,"Volume":"68","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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