sp. nov., a new diatom species (Bacillariophyta) from the Turkish Coast of the Black Sea.

E.J. Cox is a diatom genus comprising 17 taxa reported from various regions of the world. While many species of are epibiontic, the taxa have variable ecological preferences. In this study we formally describe , an epilithic species discovered along the Turkish Black Sea Coast, based on light and scanning electron microscopy. is characterized by valves that are lanceolate to narrowly lanceolate, slightly constricted near the apices with uniseriate, parallel throughout the whole valve, transapical striae and and the presence of an apical silica flap. The areolae are distributed over the valve face and the mantle. The differences and similarities between and established species of are discussed. Based on shape and morphometrics, the most similar species is , but it is easily distinguished from by its lack of an apical silica flap.