Definition: Spheniscomorphae are a group of animals that share a common ancestor with the phylum Chordata, which includes fish, birds, mammals and reptiles. These animals have a similar body structure with long, flexible limbs, and they have a segmented skin that is adapted for swimming. The spheniscomorphae include a wide variety of animals from different orders, such as the chelicerates (which are the most common), the arthropods (such
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