Ferocia gen. nov., a new centric diatom genus (Bacillariophyceae) from the sub-Antarctic region

0489362 - BÚ 2019 RIV NZ eng J - Článek v odborném periodiku
Van de Vijver, B. - Chattová, B. - Lebouvier, M. - Houk, Václav
Ferocia gen. nov., a new centric diatom genus (Bacillariophyceae) from the sub-Antarctic region.
Phytotaxa. Roč. 332, č. 1 (2017), s. 22-30. ISSN 1179-3155. E-ISSN 1179-3163
Grant CEP: GA ČR GA205/05/0204
Výzkumný záměr: CEZ:AV0Z60050516
Institucionální podpora: RVO:67985939
Klíčová slova: centric diatoms * new genus * Melosira * Ferocia * sub-Antarctic Region
Obor OECD: Plant sciences, botany
Impakt faktor: 1.185, rok: 2017

A new centric diatom genus, Ferocia Van de Vijver & Houk gen. nov. is described based on Melosira setosa Greville. Several samples collected in lava tunnels on Ile Amsterdam, a small isolated, volcanic island in the southern Indian Ocean where the latter taxon dominated the diatom flora, were investigated. The new genus is characterized by having heavily silicified, spherical frustules, connected into long chains by large, complex linking spines. Valves are dome-shaped with a high mantle with rounded to irregularly shaped areolae. Numerous small rimoportulae forming a marginal ring are present near the mantle edge. The cingulum is composed of a large number of narrow, open copulae. A second species, Ferocia ninae Van de Vijver & Houk sp. nov., is described from the nearby Crozet archipelago. Besides the typical features of the genus Ferocia, the rimoportulae in F. ninae are almost equidistant, the valves have a relatively low valve height and the spines are relatively small.
Trvalý link: http://hdl.handle.net/11104/0283791