Die Acritarcha: ihre Klassifikation, Morphologie, Ultrastruktur und paläoökologische/paläogeographische Verbreitung

  title={Die Acritarcha: ihre Klassifikation, Morphologie, Ultrastruktur und pal{\"a}o{\"o}kologische/pal{\"a}ogeographische Verbreitung},
  author={Michael Montenari and Ursula Leppig},
  journal={Pal{\"a}ontologische Zeitschrift},
The acritarchs are considered to form the oldest marine organisms with an eukaryotic cell Organization. They are of great biostratigraphic, palaeoecological and palaeobiogeographic importance for the Precambrian and Early Palaeozoic. The present study provides a survey of their possible biological affinities. The main morphological characteristics of the acritarchs and their palaeogeographic and palaeoecological distribution are described and evaluated. Regarding the gene-sis of eukaryotes, the… 

An overview of the taxonomic groups of non-pollen palynomorphs

Abstract Non-pollen palynomorphs (NPPs) are ‘extra’ microfossils often found in palynology slides. These include remains of organisms within the size range of pollen grains (c. 10–250 µm), resistant

The end-Frasnian mass extinction in the Eifel Mountains, Germany: new insights from organic matter composition and preservation

Abstract The Büdesheimer Bach borehole in the Prüm Syncline, Eifel Mountains, Germany encountered upper Frasnian and lowermost Famennian sediments including the Upper Kellwasser Horizon (UKW) and a

Comparative palynofacies, magnetic susceptibility and cyclicity of the Middle Devonian Müllertchen Section (Eifel area, Germany)

The recognition of subtle small-scale cycles in “monotonous” calcareous mudstone intervals requires a multi-disciplinary approach. In the classical Eifel area of Germany, a section of lower Givetian

Paleoenvironmental evolution of the coastal plain of Southern Brazil: palynological data from a Holocene core in Santa Catarina State.

A paleoenvironmental reconstruction from palynological analyses of a sedimentary core of Holocene age, drilled at municipality of Garopaba (Santa Catarina), Southern Brazil, suggests less marine influence in the lagoonal body.

Palynomorph distribution and bathymetry in the Chanxhe section (Eastern Belgium), reference for the neritic Late to Latest Famennian transition (Late Devonian)

Since the I.U.G.S. Subcommission on Devonian Stratigraphy (SDS) has decided, in 2004, to subdivide the Famennian Stage into four substages, the base of the Latest Famennian has been proposed at the

An enigmatic microorganism from the Upper Pennsylvanian Grand-Croix cherts (Saint-Etienne Basin, France)

A new species of Penaeidae, Libanocaris annettae nov. sp. from the Upper Jurassic Solnhofen Lithographic Limestones (Eichstätt Formation; Lower Tithonian, Hybonotum Zone) is described. In addition,



Morphological development of resting cysts in cultures of the marine dinoflagellate Lingulodinium polyedrum (= L. Machaerophorum)

The previously undescribed morphological development of resting cysts of the living marine dinoflagellate Lingulodinium ("Gonyaulax") polyedrum has been observed in laboratory cultures and planozygotes preparing to encyst showed a distinctive interstice in the peripheral cytoplasm and often displayed a characteristic swimming behavior.

Microfossils in the "Eopaleozoic" Jacadigo Group at Urucum, Mato Grosso, Southwest Brazil

Microfossils have been previously reported (YOSHIDA, et al., 1977) but never wel1 documented from the famed, richly ferruginous, Jacadigo Group of probable "Eopaleozoic" age at Urucum, Mato Grosso,

Direct evidence for secondary loss of mitochondria in Entamoeba histolytica.

  • C. ClarkA. Roger
  • Biology
    Proceedings of the National Academy of Sciences of the United States of America
  • 1995
Direct evidence for secondary loss of mitochondrial function was obtained by isolating two E. histolytica genes encoding proteins that in other eukaryotes are localized in the mitochondrion: the enzyme pyridine nucleotide transhydrogenase and the chaperonin cpn60.

Molecular phylogeny of the free-living archezoanTrepomonas agilis and the nature of the first eukaryote

It is suggested that this fundamental divergence in manner of feeding and in the symmetry of the cytoskeleton evolved in a free-living diplozoan very early indeed in the evolution of the eukaryotic cell, possibly very soon after the origin of the diplokaryotic state.

Late Proterozoic vase-shaped microfossils from the Visingsö Beds, Sweden

Abstract Vase-shaped microfossils occur abundantly in phosphate nodules from near-shore, marine shales and siltstones of the Late Proterozoic (Late Riphean to Early Vendian) Visingso Beds in southern

Palynological Evidence Bearing on the Ordovician-Silurian Paraconformity in Ohio

Organic microfossils (spore tetrads, acrit-archs, scolecodonts, chitinozoans) from six Late Ordovician through Early Silurian samples (Elkhorn Formation of the Richmond Group; lower and upper beds of

Latest Proterozoic plankton from the Amadeus Basin in central Australia

The plankton of the Proterozoic is preserved mainly as microfossils known as acritarchs, most of which are considered to be cysts of eukaryotic algae. In recent studies of the diversity of

Palaeobiogeography of Middle Palaeozoic organic-walled phytoplankton

  • G. Colbath
  • Environmental Science, Geography
    Geological Society, London, Memoirs
  • 1990
Abstract Potential advantages to the use of Palaeozoic organic-walled phytoplankton over other fossil groups are their presence in large numbers in small samples (particularly cores) and their

A review of marine palaeoenvironmental analysis from fossils

  • D. BosenceP. Allison
  • Environmental Science, Geography
    Geological Society, London, Special Publications
  • 1995
The papers in this volume critically review the use of fossils, including their inorganic skeletal tissue or their soluble organic remains, for the analysis of palaeoenvironments. The contributions