First Record of The Thecate Marine Dinoflagellate Protoperidinium abei (Peridiniales, Dinophyceae) in Indonesia

Two identical dinoflagellate cell specimens were found in a seawater sample collected from Tanjung Pasir Beach (TPB; 6.01 S, 106.8 N), Banten, Indonesia and subjected to morphological characterization light microscopy (LM). The cells measured 71.97–72.86 µm long 52.55–52.76 wide, fusiform or biconical-shaped, with tapered apical antapical horns. A sharp pointy spine was present at the antapex. Kofoidean thecal plates arrangement pattern of formulated as Po, 4', 2a, 7'', 3(?)c, 4s, 5''', 2''''. Based on this plate tabulation formula combined morphologies, conformed original description of, therefore identified as, Protoperidinium abei (Paulsen) Balech. This study constitutes first record P. illustrate describe its detailed morphology using LM.