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Extra info for Great White Sharks. The Biology of Carcharodon Carcharias
Early studies of the relationships of lamniform sharks began primarily with Jordan (1898), and lamniform sharks were later organized by Bigelow and Schroeder (1948). PhyGREAT WHITE SHARKS The Biology of Carcharodon carcharias 37 Copyright © 1996 by Academic Press, Inc. All rights of reproduction in any form reserved. DOUGLAS /. LONG AND BENJAMIN M. 3 U O 73 :3 (U O tn & fi(TJ tiO d) s o TJ d d o x; o 0) U (d B HJ o M «J -6 1-4 U FIGURE 1 (A) Cladogram showing the phylogeny of the 10 lamniform shark genera, based on 23 dental characters (Table I).
In Fig. 4, the intermediate tooth, Int, is reversed. Its anterior root edge is almost straight and the posterior is longer. The anterior edge of the crown is almost perpendicular, and the posterior side is angled toward the front of the jaw. The first upper lateral bears an almost straight crown and has wide roots that form an open V-shaped interspace. The second upper lateral is the largest lateral and the widest tooth in the jaw. The anterior edge of its crown is concave, and the tip of the posterior edge is convex.
For all data sets, we generated 10,000 random trees and calculated the gi value. We repeated this five times, calculated the mean ^ | value, and compared it with the table of critical values in the article by Hillis and Huelsenbeck (1992). Results Branch-and-bound searching on the original data set yielded a single most parsimonious tree with a length of 60 (Figs. 720. The bootstrap consensus tree collapsed some branches to polytomies but did not contradict the most parsimonious tree in any way.