Chemostratigraphic reconstruction of biofacies: Molecular evidence linking cyst-forming dinoflagellates with pre-Triassic ancestors

  title={Chemostratigraphic reconstruction of biofacies: Molecular evidence linking cyst-forming dinoflagellates with pre-Triassic ancestors},
  author={J. M. Moldowan and J. Dahl and S. R. Jacobson and B. Huizinga and F. Fago and Rupa Shetty and D. Watt and K. Peters},
New data from numerous detailed mass-spectrometric studies have detected triaromatic dinosteroids in Precambrian to Cenozoic rock samples. Triaromatic dinosteroids are organic geochemicals derived from dinosterols, compounds known in modern organisms to be the nearly exclusive widely occurring products of dinoflagellates. We observed the ubiquitous occurrence of these dinosteroids in 49 Late Triassic through Cretaceous marine source rocks and the absence of them in 13 Permian-Carboniferous… Expand
The distribution of molecular fossils derived from dinoflagellates in Paleogene lacustrine sediments (Bohai Bay Basin, China)
Steroids with unconventional side chains in ancient sediments and petroleum have been increasingly used as age diagnostic markers. Triaromatic dinosteroids and dinosteranes occur widely throughoutExpand
The oldest known dinoflagellates: Morphological and molecular evidence from
The detec-tion of dinosterane, a dinoflagellate biomarker, from pyro-lytic product of these fossils further supports the morpho-logical inference, and is consistent with molecular clock estimate that dinof lagellates may have diverged 700 to 900 million years before previously known fossil re-cord. Expand
A distinctive biomarker assemblage in an Infracambrian oil and source rock from western India: Molecular signatures of eukaryotic sterols and prokaryotic carotenoids
Molecular fossils record aspects of Neoproterozoic-Early Cambrian palaeobiology in the Bikaner-Nagaur Basin, western India using gas chromatography–mass spectrometry to identify biomarker assemblage indicating significant contribution from both eukaryotes and bacteria. Expand
Biological and Molecular Geochemical Evidence for Dinoflagellate Ancestors in the Upper Sinian-Cambrian
Dinoflagellates are single celled organisms that reflect the ecological conditions in modern oceans and lakes. Their earliest undisputed fossil record suggests that dinoflagellates originated fromExpand
New triaromatic steroids distinguish Paleozoic from Mesozoic oil
Certain biomarkers in petroleum provide information on of the geologic age of its source rock and these can also be used to track the evolution, radiation and relationships between taxa and asExpand
The temporal and spatial distribution of Triassic dinoflagellate cysts
Abstract The records of fossil dinoflagellate cysts from the Late Triassic, the time during which they first appear abundantly in the geological record, are reviewed. Most of the TriassicExpand
Dinoflagellate phylogeny revisited: reconciling morphological and molecular based phylogenies
That the dinoflagellate lineage existed in some form in the pre-Mesozoic is supported by biogeochemical data, early results of which indicate that certain early Paleozoic acanthomorph acritarchs may belong to the lin... Expand
The dinoflagellate cyst Subtilisphaera from the Eocene of the Qaidam Basin, northwest China, and its implications for hydrocarbon exploration
article i nfo Although an abundance of 4-methyl-sterane and dinosterane thought to derive from dinoflagellates, has been detected in the Palaeogene source rocks and crude oils in the Qaidam Basin,Expand
Oldest Fossil Records of Marine Protists and the Geologic History Toward the Establishment of the Modern-Type Marine Protist World
The establishment of the modern-type marine protist world was concluded in the late Eocene by the appearance of collodarians, the continuous occurrences of ebridians, and the substituted silicon precipitation marine protists as diatoms. Expand
Late Triassic dinoflagellate cysts from the Northern Carnarvon Basin, Western Australia
Abstract The Late Triassic radiation of cyst-forming dinoflagellates in the Southern Hemisphere is investigated in the Northern Carnarvon Basin, Western Australia. This major depocentre, situated onExpand