. The ejaculatory complex in water mites (Acari:parasitengona) : morphology and potential value for systematics . Brachypoda 1 Kongs- bergia Group 4 Fig. 55 Similarity relationships among the genera of Group 5. genera in this study, it is most similar to Unionicola. Koenikea does not fit easily into any of the groups formed thus far but seems to be intermediate between the genera of Groups 4 and 5. The shape of the distolateral border, the elongation of the anterior ramus, and the reduction of the posterior keel also occur in A turns. On the other hand, the three pairs of lateral, midsection c
. The ejaculatory complex in water mites (Acari:parasitengona) : morphology and potential value for systematics . Brachypoda 1 Kongs- bergia Group 4 Fig. 55 Similarity relationships among the genera of Group 5. genera in this study, it is most similar to Unionicola. Koenikea does not fit easily into any of the groups formed thus far but seems to be intermediate between the genera of Groups 4 and 5. The shape of the distolateral border, the elongation of the anterior ramus, and the reduction of the posterior keel also occur in A turns. On the other hand, the three pairs of lateral, midsection chambers and the medially- based proximal horns suggest a distant affinity with Neumania. Four additional genera do not appear to fall within any one of the five main groups, but each can be tentatively related (Fig. 52) to one or another of them. Mideopsis shares a heavy sclerotization of the proximal chamber and the narrow shape of the posterior keel with Axonopsis in Group 5. Geayia in turn has the sclerotized proximal chamber and con- figuration of the strongly fused anterior margin and lateral wall sclerites in common with Mideopsis. The EC of Albia is similar to that of Koenikea in the medial placement of the proximal horns, form of the posterior keel, and elongate anterior ramus. Thus Albia also appears distantly related to Group 5. Midea can be linked to the same group via two features shared with Kongsbergia: a pair of elongate, curved, rod-like distal scle- rites anteriorly in the midsection and a median, proximally-directed exten- sion of the anterior margin sclerite (proximal ramus). Species of these genera are hard-bodied, actively-swimming mites, and associated modifi- sations of the EC have possibly obscured relationships. On the basis of overall homology of the EC skeleton, the genera of Groups 1, 2, and 3 have a strong basic affinity with those of Groups 4 and 5. The generalized, intermediate EC structure of Limnesia is at 70
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