Unarmored dinoflagellates, in the family Kareniaceae, include harmful or toxic bloom-forming species, which are associated with massive fish kills and mortalities of marine organisms worldwide. The occurrence and distribution of the toxigenic species in the family Kareniaceae were investigated in the brackish and coastal waters of Korea between July 2018 and October 2020. During the survey, we collected seven newly recorded species; Karenia papilionacea, Karlodinium digitatum, Karl. veneficum, Karl. zhouanum, Takayama acrotrocha, T. helix, and T. tasmanica. A total of fifteen strains of the seven taxa were successfully established as clonal cultures and examined using LM, SEM, and molecular phylogeny inferred from LSU rDNA sequences. Herein, we present the taxonomic information, morphological features, and molecular phylogenetic positions of the unrecorded dinoflagellate species collected from Korean coastal waters.

Abstract
INTRODUCTION
MATERIALS AND METHODS
    1. Sampling and culture collection
    2. Light microscopy
    3. Scanning electron microscopy
    4. DNA extraction, PCR, Sequencing
    5. Alignments and phylogenetic analyses
RESULTS AND DISCUSS
    1. Taxonomic summary
    2. Molecular phylogeny
REFERENCES

• Minji Cho(Division of Earth Environmental System Science, Pukyong National University)
• Hojoon Choi(Division of Earth Environmental System Science, Pukyong National University)
• Seung Won Nam(Protist Research Team, Nakdonggang National Institute of Biological Resources)
• Sunju Kim(Division of Earth Environmental System Science, Pukyong National University/Department of Oceanography, Pukyong National University) Corresponding author