author={F. Martin},
  journal={Biological Reviews},
1. Acritarchs are a polyphyletic group of unicellular organisms, essentially marine and fossil, with a very resistant organic membrane; the majority probably represent the cysts of microscopic, extinct eukaryote algae. This review gives a general account for the non‐specialist of their characteristics and affinities, but focuses, using selected examples, on their role as biostratigraphic tools for the specialist. 
New colonial acritarch Involusphaeridium gutschicki gen. et sp. nov. from the Lower Sappington Formation (Upper Famennian), western Montana, USA
Abstract Palynological investigation carried on the samples from the Unit 1 of the Sappington Formation (Upper Famennian, Montana, USA) reveals a presence of rich phytoplankton and microfloraExpand
Microfossils of eukaryotic cysts through time : A study of Precambrian-Ordovician organic-walled microbiota
Microfossils of eukaryotic cysts through time through time are studied in a study of Precambrian-Ordovician organic-walled microbiota. Expand
Biofacies Analysis of Lower and Middle Jurassic Deposits of Siberia on Palynomorphs
Abstract The results of palynomorph biofacies analysis of the Lower and Middle Jurassic deposits of Western and Eastern Siberia are presented. A comprehensive study of different groups ofExpand
A new acritarch spike of Leiosphaeridia dessicata comb. nov. emend. from the Upper Permian and Lower Triassic sequence of India (Pranhita-Godavari Basin): Its origin and palaeoecological significance
Abstract The Permian–Triassic Mass Extinction (PTME) event was the largest bio crisis to date, adversely affecting life on land and sea. The PTME event is evidenced in India by the destruction ofExpand
Revision of the Cambro-Ordovician acritarch genus Vulcanisphaera Deunff, 1961
Abstract After its first description in Cambrian–Ordovician boundary strata from Gondwana, the acritarch genus Vulcanisphaera Deunff, 1961 has been found subsequently on most other paleocontinents,Expand
Revisiting the Great Ordovician Diversification of land plants: Recent data and perspectives
Abstract Recent molecular clock data suggest with high probability a Cambrian origin of Embryophyta (also called land plants), indicating that their terrestrialization most probably started about 500Expand
Palynomorph optical analyses for thermal maturity assessment of Upper Ordovician (Katian-Hirnantian) rocks from Southern Estonia
Abstract Application of integrated, multi-proxy optical analytical techniques for the assessment of thermal maturity of organic matter was tested in Katian to Hirnantian (Upper Ordovician) sedimentsExpand
Updating Frasnian miospore zonation from the Boulonnais (Northern France) and comparison with new data from the Upper Palaeozoic cover on the Brabant Massif (Western Belgium)
1. Introduction Former accurate palyno-analysis from the Upper Givetian to the Lower Famennian in the Boulonnais (Northern France), made some forty years ago, had to be re-evaluated. Consequently,Expand


Redeposition of Microscopic Devonian Plant Fossils
  • J. Hough
  • Geology
  • The Journal of Geology
  • 1934
Sporangiies huronensis, a Devonian plant spore, has been redeposited in the present-day bottom sediments of Lake Michigan, having been eroded from an intermediate resting place in glacial till. TheExpand
Microflora of the Bitter Springs Formation, late Precambrian, central Australia
Thirty new species, representing 24 new genera, of green algae, blue-green algae, colonial bacteria, fungus-like filaments, and possible pyrrophytes, are described from the bedded carbonaceous chertsExpand
Summary A prolific assemblage of microplankton from the Shineton Shales (Tremadocian) is described. It consists almost entirely of hystrichospheres, including several new species ofExpand
Is Moyeria a euglenoid
Moyeria, with a known age span of Middle Ordovician through Silurian, and normally placed in the acritarchs, may have euglenoid affinities. If this conclusion is correct it represents the oldestExpand
Modern dinoflagellate cysts and evolution of the Peridiniales
It is concluded that modern resting cysts of thecate din oflagellates are homologous with some fossil dinoflages and hystrichospheres and systematic morphological fluctuations follow patterns already known; and relations reflect evolution of the Peridiniales. Expand
Prokaryotic and eukaryotic microfossils from a Proterozoic/Phanerozoic transition in China
Cherts of the Doushantuo Formation in the Yangtze Gorges, South China, contain a superbly preserved heterogeneous assemblage of bacteria, cyanobacteria, planktonic algae, submillimetre-sized burrowsExpand
Ordovician spores with trilete rays from Washington Land, North Greenland
Abstract Late Ordovician dispersed ornamented spores with trilete rays are recorded from the Troedsson Cliff Formation in Washington Land, western North Greenland. Biostratigraphical information fromExpand
Hystrichophyta and acritarchs
Abstract Globular organisms which are found in great abundance in the Posidonia shales of northwestern Germany, have been added to the hystrichosphaerids by Eisenack (1954, 1958), who also includedExpand
On the interpretation and classification of Precambrian organic-walled microfossils
Simple organic-walled microfossils cannot be classified in the same way as living microorganisms because they do not show the necessary characters. An objective paleontological assessment of earlyExpand
Three species of Halosphaera
Two phases, cyst and motile, of three species of Halosphaera (Prasinophyceae), H. viridis Schrn., H. minor Ostenf. and H. russellii Parke, sp.nov., are described and the distinguishing charactersExpand