Are there animals that are present in two different classes, like amphibian and bird, reptile and mammal etc.?

  • $\begingroup$ Like mammals also being vertebrates? $\endgroup$ – WYSIWYG Jan 25 '17 at 8:36
  • $\begingroup$ @WYSIWYG FOR EXAMPLE frog is an amphibian and a mammal (this is not correct it's just an EXAMPLE)..Are there animals present in two different classes? $\endgroup$ – user6918687 Jan 25 '17 at 8:47
  • $\begingroup$ @WYSIWYG Wouldn't taxonomist propose a new class if some species (somehow) showed characteristics of 2 close classes? $\endgroup$ – Mockingbird Jan 25 '17 at 13:16
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    $\begingroup$ @WYSIWYG Mammals are a class, vertebrates compose a subphylum. $\endgroup$ – bpedit Jan 25 '17 at 18:05
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    $\begingroup$ Classes are a holdover from Linnean classification that don't have any real taxonomic meaning in modern systematics. $\endgroup$ – kmm Jan 25 '17 at 22:07

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