|
Harvestman Phylogeny
Harvestmen (Opiliones) are an order (biology), order of Arachnida, arachnids often confused with spiders, though the two orders are not closely related. Research on harvestman phylogeny (that is, the phylogenetic tree) is in a state of flux. While some family (biology), families are clearly monophyletic, that is share a common ancestor, others are not, and the relationships between families are often not well understood. Position in Arachnida The relationship of harvestmen with other arachnid orders is still not sufficiently resolved. Up until the 1980s they were thought to be closely related to mites (Acari). In 1990, Shultz proposed grouping them with scorpions, pseudoscorpions and Solifugae ("camel spiders"); he named this clade Dromopoda. This view is currently widely accepted. However, the relationships of the orders within Dromopoda are not yet sufficiently resolved. Analyses of recent taxa suggested the harvestmen to be the sister group of the three others, collectively ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phylogenetic Analyses Of Opiliones 2014-A
In biology, phylogenetics (; from Greek language, Greek wikt:φυλή, φυλή/wikt:φῦλον, φῦλον [] "tribe, clan, race", and wikt:γενετικός, γενετικός [] "origin, source, birth") is the study of the evolutionary history and relationships among or within groups of organisms. These relationships are determined by Computational phylogenetics, phylogenetic inference methods that focus on observed heritable traits, such as DNA sequences, Protein, protein Amino acid, amino acid sequences, or Morphology (biology), morphology. The result of such an analysis is a phylogenetic tree—a diagram containing a hypothesis of relationships that reflects the evolutionary history of a group of organisms. The tips of a phylogenetic tree can be living taxa or fossils, and represent the "end" or the present time in an evolutionary lineage. A phylogenetic diagram can be rooted or unrooted. A rooted tree diagram indicates the hypothetical common ancestor of the tree. An un ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
