All characters are ordered unless stated otherwise. If a character is not discussed for a genus, then it is not preserved in any specimen and is coded with a question mark (?) within Appendix Table 1. A numeral within brackets; e.g., (= 0), indicates the coding structure used in Appendix Tables 1 and 2 to define the character state for the character in question.
In order to help determine likely duplication of associated characters, we were careful to note apparent similarities in the data matrix when a number of characters from one region were being examined; e.g., features associated with the temporomandibular joint (TMJ). We examined four characters associated with the TMJ (characters 24 to 27), and none of these features showed a consistent trend within taxa. If they had, we would have seriously considered deleting some of these characters so that there was no suggestion of bias. For example, a data matrix of one specific region (e.g. the TMJ) was presented like this:
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