Liladhar Mishra
Zoology
June 2021
In recent years, research on the phylogeny of animals has advanced significantly. Regarding several profound animal connections, including the monophyly of animals, Bilateria, Protostomia, Ecdysozoa, and Spiralia, there is widespread agreement. The stability now enables academics to construct alternate theories for the dwindling number of unanswered problems. The connections at the base of the animal tree, the placement of Xenacoelomorpha, and the internal relationships of Spiralia are some of the unanswered mysteries. Our comprehension of the evolution of development, morphology, genomes, and other characteristics has been significantly impacted by recent developments in the study of animal phylogeny. A startling trend appears: even amid many complicated traits like segmentation and nervous systems, there is far more homoplasy for all these characters than was previously thought. The fossil record places the roots of the majority of the deep animal tree branches in the Late Neoproterozoic and an evolutionary radiation in the Early Cambrian.
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© Airo Journals 2021
