Taxonomic studies of marine dinoflagellates and distribution in the coastal waters of Kakinada, Andhra Pradesh, India Author Bhowal, A Zoological Survey of India, Protozoology Section, M Block, New Alipore, Kolkata, West Bengal - 700 053, India & Department of Zoology, University of Calcutta, Kolkata, West Bengal - 700 019, India * [E-mail: jasbose @ gmail. com] Author Purushothaman, J Zoological Survey of India, Protozoology Section, M Block, New Alipore, Kolkata, West Bengal - 700 053, India jasbose@gmail.com Author Siddique, A Zoological Survey of India, Protozoology Section, M Block, New Alipore, Kolkata, West Bengal - 700 053, India & Department of Zoology, University of Calcutta, Kolkata, West Bengal - 700 019, India * [E-mail: jasbose @ gmail. com] text Indian Journal of Geo Marine Sciences 2023 2023-08-31 52 8 390 401 journal article 299611 10.56042/ijms.v52i08.11023 007f04a1-b276-4297-b014-76644398954f 2582-6727 11622455 10. Tripos inflatus (Kofoid) , F.Gómez, 2013 Diagnostic characters: Thecate, elongated and spindle-shaped dinoflagellate. Body inflated slightly. Epitheca tapers to a single apical horn. Hypotheca forms a prominent left antapical horn, which abruptly curves at the distal end, and a reduced right antapical horn. The left antapical and the apical horns are equal in length ( Fig. 2k ). Distribution: Tamil Nadu coast, India 10 , Gulf of Mannar 9 , North Arabian Sea 23 , Indian Ocean 11 , Mediterranean waters 42 , Mexican waters, Pacific Ocean 33 , West Indies, the Antilles 44 , New Zealand coastal waters 30 , Australian waters 31 . This species was recorded from the station APK1 (surface waters), APK2, APK3 (surface and subsurface depths), and APK4 (subsurface depths) for the first time in Kakinada waters, and in the state of Andhra Pradesh .