A revision of the Late Ordovician marellomorph arthropod Furca bohemica from Czech Republic

Article English OPEN
Rak, Štěpán ; Ortega-Hernández, Javier ; Legg, David A.

The enigmatic marrellomorph arthropod Furca bohemica from the Upper Ordovician Letná 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 Hunsrück 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 Letná Formation indicates that F. bohemica inhabited a shallow marine environment, distinguishing it palaeoecologically from all other known marrellomorphs, which have been reported from the continental shelf.
  • References (61)
    61 references, page 1 of 7

    Allen, R.E. 2002. Role of diffusion-precipitation reactions in authigenic pyritization. Chemical Geology 182: 461-472.

    Babcock, L.E. 1993. Trilobite malformations and the fossil record of behavioral asymmetry. Journal of Paleontology 67: 217-229.

    Barrande, J. 1846. Noveaux Trilobites. Supplément et la Notice préliminaire sur le Systême silurien et les Trilobites de la Bohême. 40 pp. J.G. Calve, Prague.

    Barrande, J. 1852. Systême silurien du centre de la Bohême Vol. 1. Trilobites. 70 pp. Published by the author, Prague.

    Barrande, J. 1872. Systême silurien du centre de la Bohême: I. Partie, Supplement au Vol. 1. Trilobites, Crustacés divers et Poissons. 72 pp. Published by the author, Prague.

    Barriel, V. and Tassy, P. 1998. Rooting with multiple outgroups: consensus versus parsimony. Cladistics 14: 193-200.

    Bergström, J. 1973. Organization, life and systematics of trilobites. Fossils and Strata 2: 1-69.

    Beurlen, K. 1930. Vergleichende Stammesgeschichte. Grundlagen, Methoden, Probleme unter besonderer Berücksichtigung der höheren Krebse. Fortschritte der Geologie und Palaeontologie 8: 317-586.

    Bigsby, J. 1868. Thesaurus siluricus. The flora and the fauna of the Silurian period. 214 pp. Taylor and Francis, London.

    Birenheide, R. 1971. Beobachtung am “Scheinsten” Mimetaster aus dem Hünsruck−Schiefer. Senckenbergiana lethae 52: 77-91.

  • Similar Research Results (1)
  • Metrics
    No metrics available
Share - Bookmark