{"refrec":{"BRefID":221971,"RR":"<b>Delsate, D.; Blieck, A.; Steemans, P.</b> (2004). A psammosteid heterostracan (vertebrata: Pteraspidomorphi) from the Emsian (lower Devonian) of the grand duchy of Luxembourg. <i>Geol. Belg. 7(1-2)</i>: 21-26","BEntID":213698,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Geol. Belg. 7(1-2)</i>: 21-26","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Delsate, D.; Blieck, A.; Steemans, P.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Delsate, D. <i>et al.</i>","Englishabstract":"A fragment of a ventral disc of the head carapace of Drepanaspis sp. is reported for the first time from the Schuttbourg Formation of the Grand Duchy of Luxembourg. This formation is classically attributed to the upper lower Emsian (E1b). However, the fossil content of the locality (Merkholtz South-East quarry), including miospores, macroplants, bivalves, pterygotids, ostracodes and vertebrates, indicates a middle-upper Emsian age. This age is traditionally attributed to the overlying Clervaux Formation (Klerf-Schichten) of Luxembourg and western Germany (E2). This Drepanaspis record is the first record of a psammosteid heterostracan in the Ardenne Massif. Drepanaspis is otherwise known from the Pragian-Emsian of both SW England and western Germany.","AbstractOtherLang":"Un hétérostracé psammostéide (Vertebrata : Pteraspidomorphi) de l'Emsien (Dévonien inférieur) du Grand-Duché de Luxembourg. Un fragment de disque ventral de la carapace céphalique de Drepanaspis sp. a été récolté pour la première fois dans les Quartzophyllades de Schuttbourg du Grand-Duché de Luxembourg. Cette formation est habituellement attribuée à la partie supérieure de l'Emsien inférieur (E1b). Cependant, l'assemblage fossile de la localité (carrière sud-est de Merkholtz), qui comprend des miospores, des plantes, des bivalves, des ptérygotides, des ostracodes et des vertébrés, conduit à un âge emsien moyen à supérieur (E2), âge traditionnellement attribué aux couches sus-jacentes, les Schistes de Clervaux (Klerf-Schichten) du Luxembourg et d'Allemagne occidentale. Cette localité à Drepanaspis correspond à la première mention d'un hétérostracé psammostéide dans le Massif ardennais. Drepanaspis est connu dans le Praguien et l'Emsien du sud-ouest de l'Angleterre et de l'Allemagne de l'ouest.","BibLvlCode":"AS","StandardTitle":"A psammosteid heterostracan (vertebrata: Pteraspidomorphi) from the Emsian (lower Devonian) of the grand duchy of Luxembourg","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":"Psammosteidae, Drepanaspis, new record, Schuttbourg Formation, Clervaux Formation","OtherDescriptors":null,"Notes":null,"AnaPub":2004,"MonPub":null,"DateUpdate":"2013-05-03","DateCreate":"2013-01-15","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1},"refs":null,"anarec":{"AnaID":221971,"PubliDate":2004,"Pagination":"21-26","XtraPublOfAnaID":null,"ISBN":null,"Volume":"7","Issue":"1-2","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":45707,"SerRR":"Geologica Belgica. 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