A preliminary phylogeny of Pelagiidae (Cnidaria, Scyphozoa), with new observations of Chrysaora colorata comb. nov
نویسندگان
چکیده
The nomenclature of the purple-striped jelly® sh from southern California, currently known as Pelagia colorataRussell, 1964, is apparently in error. Our cladistic analysis of 20 characters for 15 pelagiid species indicates that P. colorata shares a common evolutionary history with members of the genus Chrysaora. There appears to be a number of characters shared among species of Chrysaora due to common ancestry, including a distinctive pattern of nematocyst patches in the ephyra, as well as deep rhopaliar pits and star-shaped exumbrellar marks of the medusa. In addition, our data indicate that there is a close phylogenetic relationship between P. colorata and C. achylos Martin et al., 1997. Both species share a previously unidenti® ed and conspicuous internal structure, termed quadralinga. We reassign P. colorata to the Chrysaora clade and provide a redescription of it accordingly. A ® eld key to eight species of Chrysaora from the Americas and Europe is provided.
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