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and The genus Dissodactylus traditionally has been defined by its ectosymbiotic relation- ships with irregular echinoids and the pos- session of bifid dactyli on the walking legs (Smith, 1870; Bouvier, 1917; Rathbun, 1918; Williams, 1965; Griffith, 1987b) (Figs. 1 D, 2D). Apart from the latter trait, which is recognized as a synapomorphy for all species, the taxonomic significance of mor- phological diversity within the genus has remained unexamined. Recently one of us (Griffith, 1987a), in a detailed phylogenetic study of Dissodactylus, provided several synapomorphies that are now reevaluated to suggest the erection of a new genus, which was previously recognized as the brevipal- pus group of the Dissodactylus complex (Campos-Gonzalez, 1988). An extensive discussion of the taxonomy, distribution, ecology, and phylogeny of the Dissodactylus complex is provided in Grif- fith (1987a, b). DESCRIPTIVE ACCOUNT Clypeasterophilus, new genus Diagnosis. -Carapace with anterolateral margins continuous. Epistoma and labium of similar height, latter stout and blocky. Pterygostomium markedly concave. Third maxilliped with merus distally suboval; palp with 3 articles, slender, length shorter than widest point of ischium-merus. Dactyli of first 3 pairs of walking legs distally bifid for less than one-fourth length. Male abdomen with somites 1 and 2 and 3-6
Journal of Crustacean Biology – Brill
Published: Jan 1, 1990
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