PAUP computer program

D. L. Swofford, PAUP Phylogenetic Analysis Using Parsimony, Version 3.1. Computer program distributed by the Illinois Natural History Survey, Champaign, Illinois, 1993. 

Phylogenetic trees were generated by analyzing matrices of taxa (families of Haplosclerida) and characters (morphological, chemical) with the computer program PAUP 3.1.1 [87] in a Macintosh environment. Morphological characters are copied from De Weerdt [88], who is the only author who has formulated a detailed phylogeny of Haplosclerida families. Chemical characters are those discussed in the previous chapters, summarized in Table 4.1. 

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