Exam 2 Lecture 11

UIC BioS101 Nyberg

9

Linnaean versus cladistic

• Using cladistic principles and the rule that all named groups must be monophyletic

• 1) Birds would not be a CLASS of vertebrates because they are within the reptile clade. Birds would be within the CLASS that included reptiles as well.

• 2) The hoofed mammals, artiodactyls, would have to include the whales, as whales and hippos have synapomorphies.

Speaker Notes:

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A clade (all the descendants of a branch and only descendants of that branch) is a monophyletic group.

All monophyletic groups are clades.