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Within the diatoms (Bacillariophyta), harmful effects can be due to physical damage or to toxin production. Centric diatoms like Chaetoceros live as colonial chains of cells with long spines (setae) that can clog fish gills, causing their death.
Bacillaria paxillifer was originally described under the name Vibrio paxillifer by Otto Frederick Müller in 1786. It is the first diatom species known to be described. [5] It was separately described two years later (1788) by Johann Friedrich Gmelin as Bacillaria paradoxa.
Three diatom species were sent to the International Space Station, together with the huge (6 mm length) diatoms of Antarctica and the exclusive colonial diatom, Bacillaria paradoxa.
This classification treats diatoms as a phylum (Diatomeae/Bacillariophyta), accepts the class Mediophyceae of Medlin and co-workers, introduces new subphyla and classes for a number of otherwise isolated genera, and re-ranks a number of previously established taxa as subclasses, but does not list orders or families.
Plants vs. Zombies is a great strategic game that puts your skills to the test as you protect your home from hordes of zombies. Put away your traditional thoughts of grabbing a gun or bat and ...
Plants vs. Zombies is a 2009 tower defense video game developed and published by PopCap Games. First released for Windows and Mac OS X, the game has since been ported to consoles, handhelds, and mobile devices. The player takes the role of a homeowner amid a zombie apocalypse.
Zombies continually break the windows to gain entrance and to find and beat the players; when all players are damaged enough to fall, the game is over. Three extra maps for the Nazi Zombies game mode were added with the World at War map packs. These maps, Shi No Numa, Verruckt and Der Riese added on to the Nacht Der Untoten map which came with ...
Gyrista was first described in 1998 by protistologist Thomas Cavalier-Smith in his work A revised six-kingdom system of life, originally as a superphylum containing two phyla: Ochrophyta, the heterokont algae; and Bigyra, which then contained the pseudofungi and bigyromonads together with the opalines. [1]