{"refrec":{"BRefID":223830,"RR":"<b>Dreesen, R.; Houlleberghs, E.</b> (1980). Evolutionary trends of Famennian icriodids in the Dinant and Vesdre basins (Conodonts, Belgian upper Devonian). <i>Ann. Soc. géol. Belg. (1968) 103</i>: 111-141","BEntID":215553,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":null,"RefStringPartII":". <i>Ann. Soc. Géol. Belg. (1968) 103</i>: 111-141","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Dreesen, R.; Houlleberghs, E.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Dreesen, R.; Houlleberghs, E.","Englishabstract":"Two different probably depth- and/or facies-related morphological groups are recognized within the \"shallow water\" genus <i>Icriodus</i> of the Belgian Famennian: the \"<i>Icriodus alternatus</i> group\" dominates in the relatively quiet offshore marine sediments of the Lower Famennian (\"Groupe des Schistes de la Famenne \"), where as the \"<i>Icriodus cornutus-costatus</i> group\" characterizes the more nearshore, turbulent facies of the Upper-Famennian (\"Groupe des Psammites du Condroz\"). A probable endemic morphological evolution is suggested for the latter group. A phylomorphogenetical lineage has been observed between <i>I. alternatus</i> BRANSON & MEHL and <i>I. cornutus</i> SANNEMANN at the base of the Famennian. The interspecific morphological relations and the intraspecific morphological variability within the different <i>Icriodus</i>-stock are discussed. Three new morphotypes of <i>I. alternatus</i>, one new subspecies of <i>I. cornutus</i> and two new subsepcies of <i>I. costatus</i> (THOMAS) are described; their stratigraphical range is discussed.","AbstractOtherLang":"Deux groupes morphologiques différents, probablement liés à la profondeur et/ou au faciès, sont reconnus dans le genre, d'eau peu profonde, <i>Icriodus</i> du Famennien belge: le \"groupe <i>Icriodus alternatus</i>\" domine dans les sédiments marins \"offshore\" en eau relativement calme du Famennien inférieur (\"Groupe des schistes de la Famenne\") tandis que le \"groupe <i>Icriodus cornutus-costatus</i> caractérise le faciès plus proche du rivage et turbulent du Famennien supérieur (\"Groupe des Psammites du Condroz\"). Une évolution morphologique probablement endémique est suggérée pour le dernier groupe. Une lignée phylomorphogénétique a été observée entre <i>I. alternatus</i> BRANSON & MEHL et <i>I. cornutus</i> SANNEMANN à la base du Famennien. Les relations morphologiques interspécifiques et la variabilité morphologique intraspécifique dans les différents stocks d'<i>Icriodus</i> sont discutées. Trois nouveaux morphotypes d'</i>I. alternatus</i>, une nouvelle sous-espèce de <i>I. cornutus</i> et deux nouvelles sous-espèces de <i>I. costatus</i> (THOMAS) sont décrits; leur extension stratigraphique est discutée.","BibLvlCode":"AS","StandardTitle":"Evolutionary trends of Famennian icriodids in the Dinant and Vesdre basins (Conodonts, Belgian upper Devonian)","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-19 01:31:33.748367","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":1980,"MonPub":null,"DateUpdate":"2015-09-10","DateCreate":"2013-03-21","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1},"refs":null,"anarec":{"AnaID":223830,"PubliDate":1980,"Pagination":"111-141","XtraPublOfAnaID":null,"ISBN":null,"Volume":"103","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":45503,"SerRR":"Annales de la Société géologique de Belgique. Vaillant-Carmanne: Liège.  ISSN 0037-9395","StandardTitleSer":"Annales de la Société géologique de Belgique","ISSN":"0037-9395","AbbrevSer":"Ann. Soc. Géol. Belg. 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