NDLI: Redescription of the cyathocrinid cladid Codiacrinus schultzei Follmann, 1887 from the Lower Devonian Hunsrück Slate at Bundenbach (Germany)

Content Provider	Springer Nature Link
Author	Südkamp, Wouter H.
Copyright Year	2010
Abstract	Codiacrinus schultzei Follmann, 1887 commonly occurs in the Lower Devonian Hunsrück Slate of Bundenbach (Germany). Although this cyathocrinid cladid has been studied for almost 125 years, its morphology remains incompletely known. This article reports unusual arm growth, the regeneration of an arm, the preservation of tegminal plates, the sculpture of the cup (hexagonal concentric lines), and the preservation of visceral organs, which were positioned within the cup. One X-radiograph possibly shows the mid- and hind-gut (preserved as soft tissues). Furthermore, the shape and arrangement of the cover plates are described in more detail than previously. Codiacrinus schultzei is systematically redescribed and compared with the other species in the genus. Further study of the systematic placement (within the Flexibilia?) is appropriate.Codiacrinus schultzei Follmann, 1887 ist im unterdevonischen Hunsrückschiefer von Bundenbach (Deutschland) relativ häufig. Obwohl dieser Cyathocrinoide (Unterklasse Cladida) seit fast 125 Jahren belegt ist, ist seine Morphologie nicht vollständig bekannt. Dieser Artikel berichtet über ungewöhnliches Armwachstum und die Regeneration eines Armes, über die Erhaltung der Platten der Kelchdecke, über die Kelchstruktur (eckige konzentrische Linien) und den Erhalt der inneren Organe, die in der Kelchkapsel untergebracht waren. Eines der Röntgenbilder zeigt möglicherweise den mittleren und hinteren Darmtrakt (Weichteilerhaltung). Auch die Form und Anordnung der Deckplatten sind detaillierter als vorher beschrieben worden. Codiacrinus schultzei ist überarbeitet worden und wird mit den anderen Arten innerhalb der Gattung verglichen. Weitere Betrachtungen der taxonomischen Zugehörigkeit (innerhalb der Flexibilia?) sind angebracht.
Starting Page	241
Ending Page	255
Page Count	15
File Format	PDF
ISSN	00310220
Journal	Paläontologische Zeitschrift
Volume Number	85
Issue Number	3
e-ISSN	18676812
Language	English
Publisher	Springer-Verlag
Publisher Date	2010-11-24
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Crinoidea Codiacrinus Elicrinus Deckplatten Weichteilerhaltung Taxonomische zuordnung Hunsrückschiefer Unter-Devon Paleontology
Content Type	Text
Resource Type	Article
Subject	Paleontology

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