Contributions to Zoology, 67 (2) 125-141 (1997)Christopher C. Tudge: Phylogeny of the Anomura (Decapoda, Crustacea): Spermatozoa and spermatophore morphological evidence
Discussion

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Superfamily Galatheoidea

Family Chirostylidae The chirostylids, Eumunida sternomaculata and Uroptychus sp., are widely placed in the analysis and are more closely associated (spermatologically) with a variety of paguroids than to any galatheoids (Fig. 1). The investigated chirostylids may represent in part a link between these two major superfamilies. Martin & Abele (1986) previously noted the differences between members of the Chirostylidae and other galatheoids.

Family Galatheidae Allogalathea elegans and Munida sp. form a small clade at the base of a larger clade containing the pagurids, parapagurids, chirostylids, and the diogenid genus Clibanarius (Fig. 1& Fig. 2). The third genus investigated in the Galatheidae, Munidopsis (considered a very heterogeneous genus by McLaughlin (1983b) ), never grouped with the former two genera and is shown as the sister-group to them and to the above-mentioned larger clade. The family Galatheidae did not form a separate monophyletic clade (Fig. 1& Fig. 2).

Family Porcellanidae The representatives in this family form a monophyletic group in this analysis (Fig. 1& Fig. 2). The porcellanid clade comprised two sister clades containing the two representatives in the genus Petrolisthes in one, and the three remaining porcellanid genera, Aliaporcellana, Pisidia and Polyonyx, in the other. This dichotomy, based on spermatological and spermatophore data (Tudge, 1995a, b; Tudge & Jamieson, 1996a, b), is consistent with larval (Sankolli, 1965; Gore, 1971; Van Dover et al., 1982) and adult somatic morphology (Haig, 1965). The Porcellanidae are depicted as a basal, sister-group to the Paguroidea and the remaining galatheoids (Fig. 1, point D), and this dichotomy indicates the point on the tree where the number of microtubular arms changes from the plesiomorphic number of four or more, being fixed at three arms for the remaining terminal taxa.