NDLI: New information on the trilobites from the early Lower Emsian (Ulmen substage; Lower Devonian) of the Reideschbaach site (Luxemburg; Givonne-Oesling Anticline; Rhenohercynian Zone)

Content Provider	Springer Nature Link
Author	Basse, Martin Müller, Peter Franke, Christian
Copyright Year	2006
Abstract	Das Vorkommen Reideschbaach (südlichste Ardennen) liegt gleich südwestlich der Eifel und westlich des Hunsrücks (Rheinisches Gebirge) am Südrand der Rhenohercynischen Zone der Varisziden. Hier lieferten zwei dünne Lagen mit kleinen karbonatischen Konkretionen in mächtigen, monotonen siltigen Tonsteinen des frühen Unteremsiums in guter Erhaltung eine der südlichsten Faunen von Devontrilobiten dieser Zone. Es liegt eine Vergesellschaftung vor aus faziell auf individuelle Weise rheinischen Taxa mit untergeordnet hercynischen. Etwa die Hälfte von elf Genera ist auch aus dem Emsium der Eifel bekannt. Auffallend besonders mit Blick auf das nahe und faziell nicht sehr verschiedene Rheinische Gebirge ist der hohe Anteil an bislang unbekannten Arten. Vor allem die Vergesellschaftung der meisten Gattungen, nicht oder zumindest erheblich weniger dagegen der Arten, erinnert an das Unteremsium besonders des Kantabrischen Gebirges (Spanien). Biostratigrafisch bieten sich so Möglichkeiten, beide Regionen durch Trilobiten zu verknüpfen.Neuaufsammlungen führen zu Fortschritten in der Taxonomie:Pilletina luxemburgensis n. sp. undRhenops australocustos n. sp. (Asteropyginae) waren zunächst unter Offener Nomenklatur beschrieben. Daneben istBurmeisterella Reed (Homalonotinae) erstmals nachgewiesen.The Reideschbaach site in the neighbourhood of the Hunsrück area and of the Eifel synclines (Rhenish Mts) is situated at the southern margin of the Rhenohercynian Zone of the Variscides. Here, two thin layers bearing small carbonatic concretions in a monotonous series of silty pelites of the early Emsian have yielded one of the southernmost faunas of Devonian trilobites of this zone. They are well preserved and regarded as an assemblage including both a kind of Rhenish animals and Hercynian ones. Though individual in character, most of them have been assigned to new species, there are clear faunistic relations to parts of the Rhenish Mts. Also there is some correspondence with the Cantabrian Chains (Spain) indicated by the association of some genera, whereas there is little evidence for common species. Nevertheless, these trilobites are rather promising biostratigraphically.New findings allow some progress in taxonomy:Pilletina luxemburgensis n. sp. andRhenops australocustos n. sp. (Asteropyginae) are established for taxa which were originally described by open nomenclature. Furthermore, a specimen ofBurmeisterella (Homalonotinae) is reported for the first time.Le site de Reideschbaach se trouve dans le voisinage de l’Eifel et du Hunsrück (Massif Schisteux Rhénan) sur la marge sud de la zone rhéno-hercynienne des Variscides. C’est ici que deux couches minces à petites concrétions carbonatées qui se trouvent intercalées dans une série monotone de roches à majorité siltiques, fournissent une faune située plus méridionale en cette zone. Elle est une mélange d’espèces hercyniennes et rhénanes individuelles. Vu la préservation inhabituellement bonne des spécimens il est possible d’en déduire de nombreuses informations. C’est ainsi qu’il y a des liaisons avec le Massif Schisteux Rhénan et aussi par exemple avec le Chaîne Cantabrique (Espagne). Sur le plan biostratigraphique se présente la possibilité de relier les deux territoires par le biais des trilobites.Quelques exemplaires récemment trouvés améliorent la taxonomie de certains taxa jusque là problématiques: les asteropyginesPilletina luxemburgensis n. sp. etRhenops australocustos n. sp. furent originellement décrits sous nomenclature ouverte. En outre, la présence deBurmeisterella (Homalonotinae) est indiqué pour la première fois.
Starting Page	243
Ending Page	259
Page Count	17
File Format	PDF
ISSN	00372110
Journal	Palaeobiodiversity and Palaeoenvironments
Volume Number	86
Issue Number	2
e-ISSN	18671608
Language	French
Publisher	Springer Berlin Heidelberg
Publisher Date	2006-12-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Trilobites Emsien inférieur basal Luxembourg systématique Paleontology Biodiversity Animal Systematics/Taxonomy/ Biogeography Plant Systematics/Taxonomy/Biogeography Freshwater & Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Paleontology

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