Plectofrondicularia californica Cushman and Stewart, 1926 identified by scientist Neogene South East Asia | Plectofrondicularia floridiana Cushman, 1930 identified by M. Hesemann Neogene Caribbean Sea and Bahamas | Plectofrondicularia helenae (Chapman, 1941) identified by scientist Quaternary Banda, Timor and Arafura Sea | ||