Luticola vancampiana Chattová & Lebouvier & Haan & Vijver 2017, sp. nov.

• Main Authors: Chattová, Barbora, Lebouvier, Marc, Haan, Myriam De, Vijver, Bart Van De
• Format: Other/Unknown Material
• Language: unknown
• Published: 2017
• Subjects: Biodiversity; Taxonomy; Chromista; Ochrophyta; Bacillariophyceae; Naviculales; Diadesmidaceae; Luticola; Luticola vancampiana; Holo; Saint-Paul; Antarc*; Antarctica
• Online Access: https://zenodo.org/record/5628944; https://doi.org/10.5281/zenodo.5628944

Luticola vancampiana Chattová & Van de Vijver sp. nov. Figs 44‒71 Etymology The species is named after Prof. Dr. Karel Van Camp (University of Antwerp, Belgium), to thank him for his efforts in conserving the Van Heurck Collection and his broad interest in diatom research. Type ILE SAINT-PAUL: Conserverie, TAAF, sub-Antarctica, 38°42′52.0″ S, 77°31′55.5″ W, 24 Nov. 2016, B. Van de Vijver sample S029 (holo-: slide no. BR‒4496, Fig. 47; iso-: slide PLP‒331; University of Antwerp, Belgium). Description Light microscopy (Figs 44–67) Valves linear-lanceolate to elliptic-lanceolate, elliptic in the smallest specimens, with protracted, subcapitate to rostrate apices. In smaller specimens, valve ends not as protracted, only subrostrate or obtusely rounded. Initial cells rhombic-lanceolate. Valve dimensions (n = 35): length 10.0‒26.0 μm, width 5.0‒8.5 μm. Axial area linear, narrow. Single, rounded isolated pore present in the central area, located halfway between the valve centre and margin, sometimes attached to a stria. Central area wide, bow–tie shaped, bordered on both sides with a series of 3–5 round areolae. Raphe branches straight, Figs 44–71. Luticola vancampiana Chattová & Van de Vijver sp. nov. Light (LM) and scanning electron micrographs (SEM) from the type population from Conserverie on Ile Saint-Paul, B. Van de Vijver sample S029. 44–67. LM showing the variation in size and shape of the valve apices. 68–69. SEM of valve exterior. 70. SEM of valve interior. 71. SEM girdle view. Scale bars: 44–67 10 µm; 68‒71 = 5 µm. deflected away from the isolated pore at both proximal and distal ends. Transapical striae radiate throughout, 16‒19 in 10 µm. Scanning electron microscopy (Figs 68–71) Valve mantle with a single row of round areolae (Fig. 71), interrupted at the apices. Striae composed of 3–4 areolae, 1–2 areolae at the apices. Areolae round to elongated, clearly enlarged and prolonged close to the valve margins (Fig. 68). Internally, areolae occluded by hymens, forming a continuous strip across the valve ...