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For many years the diatoms—treated either as a class (Bacillariophyceae) or a phylum (Bacillariophyta)—were divided into just 2 orders, corresponding to the centric and the pennate diatoms (Centrales and Pennales; alternative names Biddulphiales and Bacillariales, as used e.g. in Lee, 1989). [9]
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.
Some species of Sphingomonadaceae are known to degrade some aromatic compounds.This makes the bacteria of interest to environmental remediation. [8]The diverse metabolic capacity of genera within the Sphingomonadaceae family, such as Sphingobium, Novosphingobium, [a] and Sphingopyxis enable these genera to adapt to and be abundant in the presence of bisphenol A.
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.
The stramenopiles, also called heterokonts, are a clade of organisms distinguished by the presence of stiff tripartite external hairs. In most species, the hairs are attached to flagella, in some they are attached to other areas of the cellular surface, and in some they have been secondarily lost (in which case relatedness to stramenopile ancestors is evident from other shared cytological ...
Despite what many believe, zombies do not exclusively exist in the realm of science fiction, and our planet is currently home to a number of them. Here are 10 'zombie' animals: Number 10.
Chromalveolata was a eukaryote supergroup present in a major classification of 2005, then regarded as one of the six major groups within the eukaryotes. [3] It was a refinement of the kingdom Chromista, first proposed by Thomas Cavalier-Smith in 1981.
In 2001, direct amplification of the rRNA gene in marine picoplankton samples revealed the presence of two novel alveolate lineages, called group I and II. [ 15 ] [ 16 ] Group I has no cultivated relatives, while group II is related to the dinoflagellate parasite Amoebophrya , which was classified until now in the Syndiniales dinoflagellate order.