the lower row of skulls are juveniles; the upper row of skulls are adults. [Thes

Question

the lower row of skulls are juveniles; the upper row of skulls are adults. [These are not drawn to the same scale.] Note that the word “peramorphocline” means that through time the skulls developed further along a morphological trend. These are early ceratopsian genera. The two cladograms on the next page are of later ceratopsian genera. Note the scale bars next to each genus (except Diceratops). Considering the figures on both pages, what can you say about ceratopsian evolution? Why (support your answer)?

Explanation / Answer

The peramorphosis has increased the sixe of the bodies of these species. This also increased the complexity of many of the features morphologically.

The juveniles seems have a faster growth. This also tells that the peramorphosis is very common in dianosaurs because they have large bodies.

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