. The ejaculatory complex in water mites (Acari:parasitengona) : morphology and potential value for systematics . Koenikea Unionicola ., Neumania Fiona T Forelia Tiphys Fig. 54 Similarity relationships among the genera of Group 4. Y-sclerites. Fiona and Tiphys are related by a similarity of overall facies, with an elongation of the proximal chamber, similar form of proximal and distal arms sclerites, and a narrow, oblique anterior keel. The lateral shelf and laterally placed Y-sclerite of Piona indicate a relationship to A tractides. The four genera of Group 5 (Fig. 55) exhibit strong mutual a
. The ejaculatory complex in water mites (Acari:parasitengona) : morphology and potential value for systematics . Koenikea Unionicola ., Neumania Fiona T Forelia Tiphys Fig. 54 Similarity relationships among the genera of Group 4. Y-sclerites. Fiona and Tiphys are related by a similarity of overall facies, with an elongation of the proximal chamber, similar form of proximal and distal arms sclerites, and a narrow, oblique anterior keel. The lateral shelf and laterally placed Y-sclerite of Piona indicate a relationship to A tractides. The four genera of Group 5 (Fig. 55) exhibit strong mutual affinities but their relationship to other mites is less clear. Axonopsis and Brachy- poda are similar in general EC structure, each characterized by a compact, well-sclerotized skeleton of robust components. In particular, the strong, U-shaped anterior margin sclerite, the complex midsection, and the prox- imally-lobed posterior keel- indicate the close phenetic relationship of these genera. Aturus presents a comparable facies and is strongly linked to Axonopsis and Brachypoda by the structure of the anterior margin scle- rite. The Kongsbergia EC is less specialized, but the form of the anterior margin sclerite, the posterior keel, and the complex structure of the mid- section tie it convincingly to the other Group 5 genera. Its more gene- ralized structure points to an additional relationship with the genera of Group 4, and the complex basal area of the distal arm sclerite, together with the form of the anterior margin sclerite, suggest that of the Group 4 69
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