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By David Paul Whistler, Xiaoming Wang, Lawrence G Barnes

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The suborder Metacopina now contains only fossils and thus has been removed from our classification, as the Darwinulocopina has now been established by Sohn (1988) to accommodate the fam- 30 Ⅵ Contributions in Science, Number 39 ily Darwinulidae (A. Cohen, pers. ). , 1998). , 1998). , 1998). The family Saipanettidae, formerly in the superfamily Healdioidea (which has been removed), also has been removed. The Saipanettidae was found to be a junior synonym of the Sigilliidae, an extant family reviewed recently by Tabuki and Hanai (1999).

In contrast, Huys and Boxshall (1991) treated the Platycopioidea as being outside of the Gymnoplea. There are other differences as well, such as the placement of the monstrilloids and cyclopoids. Ho (1990) consistently placed these taxa near each other, whereas Huys and Boxshall (1991) separate them in their classification, at least implying that they are not closely related. In his subsequent critique of the Huys and Boxshall (1991) phylogeny, Ho (1994a) pointed out an alternative phylogeny where the Misophrioida was depicted as the sister group to the remaining seven orders of the Podoplea.

Many previous workers have considered ostracodes to be a subclass of the Maxillopoda. , see Elofsson, 1992; Huvard, 1990; and earlier papers cited in these works). , 1998). Schram (pers. , and citing K. Schultz, Das Chitinskelett der Podocopida und der Frage der Metamerie dieser Gruppe, doctoral dissertation, University of Hamburg, which we have not seen) informs us that an additional apomorphy that argues for inclusion of ostracodes within the Maxillopoda is the location of the gonopods. Swanson’s (1989a, b, 1990, 1991) discovery of living specimens of the primitive ostracode genus Manawa (family Punciidae) caused him to suggest the inclusion of ostracodes within the Maxillopoda as well.

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