Referring to the cladogram shown below, assuming that the present time is all th

Question

Referring to the cladogram shown below, assuming that the present time is all the way on the right, and the past is on the left, and then answer the following:

a. Name the two species that have the most recent common ancestor (starting with “T”): _______________________________ and _____________________________

b. Name the two species that have the most recent common ancestor (starting with “C”): _______________________________ and _____________________________

c. The total number of monophyletic groups is: _______________

d. Draw the traditional symbol for a synapomorphy, placing it in the correct place so that it is a synapomorphy shared by Cyrtodiopsis dalmanni, Cyrtodiopsis whitei and Cyrtodiopsis currani. You may make up the synapomorphy (it will be a physical feature of some kind!)

r sis breviscopium L Teleopsis rubicunda Teleopsis quadriguttata r Cyrtodiopsis currani Cyrtodiopsis dalmanni Cyrtodiopsis whitei Cyrtodiopsis quinqueguttata

Explanation / Answer

a. Name the two species that have the most recent common ancestor (starting with “T”) : Teleopsis breviscopium and Teleopsis rubicunda. Because both diverged recently from the common ancestor

b. Name the two species that have the most recent common ancestor (starting with “C”): Cyrtodiopsis dalmanni and Cyrtodiopsis whitei. Others have different ancestors which diverged very early.

c.The total number of monophyletic groups is: 2 - Teleopsis breviscopium and Teleopsis rubicunda have one common ancestor. And the other four species leaving quinqueguttata have common ancestor.

In Monophyletic grouping all species share a common ancestor and all species derived from that common ancestor are included.

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