Details of the paper
| Title | Redescription of the cyathocrinid cladid Codiacrinus schultzei FOLLMANN, 1887 from the Lower Devonian Hunsrück Slate at Bundenbach (Germany) |
| Year: | 2011 |
| Language: | English |
| Source: | Paläontologische Zeitschrift, 85 (3): 241-255 |
| Keywords: | Crinoidea, Codiacrinus, Elicrinus, cover plates, soft-tissue preservation, systematic position, Hunsrück Slate, Lower Devonian |
| Summary: | This article about the crinoid Codiacrinus schultzei Follmann, 1887 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 is 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. Photo: G. Oleschinski, Steinmann-Institut, University at Bonn |
| Reaction 1: | Ausich et al. (2013), in their paper "Tube foot preservation in the Devonian crinoid Codiacrinus from the Lower Devonian Hunsrück Slate, Germany" (Lethaia, Vol. 46: 416-420), described the first definitive proof of tube feet for any fossil crinoid, a single specimen of C. schultzei in the German Mining Museum. They refer to Südkamp (2011), which reviewed evidence for tube feet in Codiacrinus and concluded that tube feet were not preserved in the described specimens. Furthermore, the structures within the calyx in X-ray images interpreted as parts of the mid-gut and hind-gut were mentioned. The smaller plates along the arms on the reported specimen could be ambulacral cover plates. |
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