Topic
Mimetaster
About: Mimetaster is a research topic. Over the lifetime, 2 publications have been published within this topic receiving 38 citations.
Papers
TL;DR: The phylogenetic position of M. hexagonalis as a member of the Marrellomorpha is confirmed, but remains to be explored within the broader frame of euarthropod phylogeny.
Abstract: The arthropod Mimetaster hexagonalis Gurich, 1931 from the Lower Devonian Hunsruck Slate (Germany) is re-described. With 123 available individuals, M. hexagonalis is the most abundant non-trilobite arthropod from this Lagerstatte. 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 similar to that in the marrellomorph Vachonisia rogeri Lehmann, 1955. The number of trunk segments increases from juvenile to adult. The mode of life of the arthropod is re-considered. The arthropod is considered to live in groups of several individuals. A mutualistic relationship with sponges of unknown systematic affinities is most likely. An ecological interaction with tentaculitoids is recognized but needs further investigation. The phylogenetic position of M. hexagonalis as a member of the Marrellomorpha is confirmed, but remains to be explored within the broader frame of euarthropod phylogeny.
27 citations
TL;DR: In this article, the enigmatic marrellomorph arthropod Furca bohemica from the Upper Ordovician Letna Formation, is redescribed based on existing museum specimens and new material collected from the southern slope of Ostrý Hill (Beroun, Czech Republic).
Abstract: The enigmatic marrellomorph arthropod Furca bohemica from the Upper Ordovician Letna Formation, is redescribed. Based on existing museum specimens and new material collected from the southern slope of Ostrý Hill (Beroun, Czech Republic), the morphology and taphonomy of F. bohemica is reappraised and expanded to produce a new anatomical interpretation. The previously distinct taxa F. pilosa and Furca sp., are synonymised with F. bohemica, the latter being represented by a tapho-series in which decay has obscured some of the diagnostic features. A cladistic analysis indicates close affinities between F. bohemica and the Hunsruck Slate marrellomorph Mimetaster hexagonalis, together forming the Family Mimetasteridae, contrary to previous models for marrellomorph internal relationships. As with other representatives of the group, the overall anatomy of F. bohemica is consistent with a benthic, or possibly nektobenthic, mode of life. The depositional setting of the Letna Formation indicates that F. bohemica inh...
21 citations
Performance Metrics
| Year | Papers |
|---|---|
| 2011 | 1 |
| 2010 | 1 |