Fragmenta Palaeontologica Hungarica

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Author(s): Dulai, A.
Title: Taconomic composition of Mediterranean Early Jurassic brachiopod faunas from Hungary: niche replacement and depth control
Year: 2003
Volume: 21
Pages: 43-50.

Abstract: Recent bed-by-bed collections at 16 Lower Jurassic localities in the Bakony and Gerecse Mts (Transdanubian Central Range, Hungary) yielded rich brachiopod faunas. The taxonomic composition of the faunas, representing biotopes of different depths and facies, reveals that the evolutionary intra-phylum niche replacement within the Brachiopoda, thought to occur at the TriassicJurassic boundary (SANDY 1995a), took place only after the Hettangian in the Mediterranean region. At the Gerecse localities, the distribution of spiriferinids contradicts to what was found by SANDY (1995a): the proportion of spiriferinids increases from the basin towards the submarine horsts. The ratio of the brachiopod orders at the different Hungarian localities suggests that Early Jurassic basins in the Bakony Mts were deeper than in the Gerecse Mts.
Keywords: Hungary, Mediterranean region, Brachiopoda, Early Jurassic, taxonomic composition, niche replacement, depth

Journal: Fragmenta Palaeontologica Hungarica
Journal abbreviation: Fragm. Palaeont. Hung.
ISSN: 1586-930X
Publisher: Hungarian Natural History Museum, Budapest
Editor(s): Szabó, J. & Matskási, I.