Abstract. Mesozoic–Cenozoic organic-walled dinoflagellate cyst (dinocyst) biostratigraphy is a crucial tool for relative and numerical age control in complex ancient sedimentary systems. However, stratigraphic ranges of dinocysts are found to be strongly diachronous geographically. A global compilation state-of-the-art calibrated regional could assist quantifying differences evaluating underlyi...

We report evidence of extensive substitutional editing of mitochondrial mRNAs in the dinoflagellate species Pfiesteria piscicida, Prorocentrum minimum and Crypthecodinium cohnii, based on a comparison of genomic and corresponding cDNA sequences determined for two mitochondrial DNA-encoded genes, cox1 (cytochrome oxidase subunit 1) and cob (apocytochrome b). In the cox1 mRNA, we identify 72 subs...

The presence of P. piscicida in Chesapeake Bay is documented. The appearance and behavior of the algae and symptoms associated with fish mortality were consistent with those previously observed in P. piscicida-associated aquaria fish kills in North Carolina. The discovery of P. piscicida in Chesapeake Bay shows that dinoflagellates have a dramatic and far-reaching impact on fish stocks in shall...

Title of thesis: ECTOCELLULAR ENZYME ACTIVITIES IN THE MIXOTROPHIC DINOFLAGELLATE PROROCENTRUM MINIMUM (DINOPHYCEAE) Monica Salerno, Master of Science, 2006 Thesis directed by: Professor Diane K. Stoecker Horn Point Laboratory, UMCES The activities of the enzymes α and β-glucosidase, leucine aminopeptidase and alkaline phosphatase were measured in cultures of the dinoflagellate Prorocentrum min...

Dinoflagellates constitute a large proportion of the planktonic biomass from marine to freshwater environments. Some species produce a preservable organic-walled resting cyst (dinocyst) during the sexual phase of their life cycle that is an important link between the organisms, the environment in which their parent motile theca grew, and the sedimentary record. Despite their abundance and wides...

U5 RNA is one of the six capped small nuclear RNAs present in most eukaryotic cells. Like U1, U2, U4 and U6 RNAs, U5 RNA is associated with hnRNP particles and is thus probably involved in some, as yet undefined, aspects of pre-messenger RNA processing. In this study, the complete nucleotide sequence of U5 RNA of a dinoflagellate, Crypthecodinium cohnii was determined. The analysis of this dino...