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Because of their taxonomic and morphologic diversity, the asteroids of the Lower Devonian Hunsrück Slate of Germany are important to both an understanding of the history of the class Asteroidea and to the interpretation of community evolution during the Paleozoic. Helianthaster Roemer, 1863, a large multiarmed Hunsrück asteroid, is redescribed. The Helianthasteridae Gregory is restricted to Helianthaster...
The arthropod Mimetaster hexagonalis Gürich, 1931 from the Lower Devonian Hunsrück Slate (Germany) is re-described. With 123 available individuals, M. hexagonalis is the most abundant non-trilobite arthropod from this Lagerstätte. New (as well as old) specimen material shows new morphological features of M. hexagonalis. The ontogeny is described based on three juvenile specimens. The growth mode is...
In this paper, the history of the type material of the asteroid Helianthaster rhenanus F. Roemer 1862 has been reconstructed. The most complete part is exhibited in the Teylers Museum in Haarlem, The Netherlands. This Haarlem type specimen is illustrated here, and interestingly, the X-ray seems to confirm the presence of large, semicircular muscle flanges along the midline of the arms, as figured...
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...
Dehmicystis globulus is a very poorly known Lower Devonian solute echinoderm from the Hunsrück Slate of Germany. To date, only the holotype has been formally described; however, it is incomplete and does not preserve important characters of the group. We report three new individuals on the same slab of slate, one of which is almost complete. This material informs a full systematic redescription of...
Südkamp (Paläontologische Zeitschrift 81:181–204, 2007: 198; Figs. 15A, B) described and figured the diplobathrid camerate crinoid Acanthocrinus spinosus n. sp. from the lower Devonian Hunsrück Slate of Karschheck quarry near Oberkirn, Rhineland-Palatinate, Germany. However, this name is preoccupied by Rhodocrinus (=Acanthocrinus Goldring 1926) spinosus Hall 1862 and therefore is invalid. A replacement...
For the first time, fossils of unquestionable eurypterid origin are documented from the renowned Lower Devonian Hunsrück Slate Lagerstätte in southwestern Germany. The gnathobase of a coxal plate and a body segment can be attributed to pterygotid eurypterids, probably to Jaekelopterus rhenaniae. These body parts from the Hunsrück Slate once more confirm the extraordinary large size that could be attained...
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