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Aphanothece Paralleliformis
''Aphanothece'' is a polyphyletic genus with 63 accepted species. The name is derived from the Greek words, ‘''aphanes''’ and ‘''theke''’ which mean “invisible" and “box or sheath” respectively. This genera is Cosmopolitan distribution, cosmopolitan, found in soils, thermal springs and other benthic, freshwater, marine, hypersaline, and moist terrestrial environments. Morphology can vary, with both microscopic and macroscopic colonies large enough to be collected and preserved in herbarium records. Morphology The formerly combined genera ''Aphanothece'' and ''Anathece'' can be differentiated by the size of cells, ecology and colony morphology. ''Anathece'' rarely forms colonies large enough to see and has much smaller cells, while ''Aphanothece'' can have colonies several cm in diameter and tends to have larger cells. ''Aphanothece'' species occupy a broader range of microhabitats that can be planktonic, subaerophytic, metaphytic, epipelic, or benthic. While benthi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyphyletic
A polyphyletic group is an assemblage that includes organisms with mixed evolutionary origin but does not include their most recent common ancestor. The term is often applied to groups that share similar features known as Homoplasy, homoplasies, which are explained as a result of convergent evolution. The arrangement of the members of a polyphyletic group is called a polyphyly .. [Source for pronunciation.] It is contrasted with monophyly and paraphyly. For example, the biological characteristic of warm-bloodedness evolved separately in the ancestors of mammals and the ancestors of birds; "warm-blooded animals" is therefore a polyphyletic grouping. Other examples of polyphyletic groups are algae, C4 photosynthesis, C4 photosynthetic plants, and Xenarthra#Evolutionary relationships, edentates. Many taxonomists aim to avoid homoplasies in grouping taxa together, with a goal to identify and eliminate groups that are found to be polyphyletic. This is often the stimulus for major re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
