Abstract
The genus Phanaeus (Scarabaeidae: Scarabaeinae) forms an important part of the dung beetle fauna in much of the Western Hemisphere. Here a phylogeny for Phanaeus , including 49 Phanaeus sp., and 12 outgroup taxa, is proposed. Parsimony analysis of 67 morphological characters, and one biogeographical character produced 629 equally parsimonious trees of 276 steps. Oxysternon , the putative sister taxon is nested well within the subgenus Notiophanaeus , implying that Oxysternon might ultimately need to be synonymized with Phanaeus . Species groups of Edmonds (1994) recovered as monophyletic are paleano , endymion, chalcomelas , tridens , triangularis , and quadridens . An 'unscaled' equal weighting analysis yielded 57,149 equally parsimonious trees of 372 steps. The strict consensus of these trees yielded a monophyletic Phanaeus with the inclusion of Oxysternon . Bootstrap values are relatively low and some clades are unresolved.
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