Rebecca Green emend. Véron Figs 7–9 Included species Rebecca salina (Carter) Green 2000. – Nephrochloris salina Carter 1937: pl. 2, figs 10–22. – Pavlova mesolychnon van der Veer 1969: figs 1–21. – Pavlova salina (Carter) Green 1976: pls. 1–2. Rebecca helicata (van der Veer) Green 2000. – Pavlova helicata van der Veer 1972: figs 1–8. Rebecca billardiae sp. nov. Emended description Cells solitary, free-swimming, sometimes immobile, elongated and slightly compressed or angular to almost cubic, with two unequal flagella and short haptonema. Longer anterior flagellum with fine nontubular hairs, posterior flagellum vestigial. A pit or canal penetrating the cell near the long anterior flagellum. Clavate or mono-constricted scales on the cell body and rows of di- or trimeric scales on the anterior flagellum. Pale yellow-green to golden-brown bilobed single chloroplast with parallel and helicoidal thylakoid arrangement, stigma and pyrenoid absent.

Published as part of Véron, Benoît, Rougier, Etienne, Taylor, Anthony & Goux, Didier, 2023, New species of Pavlovophyceae (Haptophyta) and revision of the genera Exanthemachrysis, Rebecca and Pavlova, pp. 21-47 in European Journal of Taxonomy 861 on page 35, DOI: 10.5852/ejt.2023.861.2063, http://zenodo.org/record/7710258