The ejaculatory complex in water The ejaculatory complex in water mites (Acari:parasitengona) : morphology and potential value for systematics ejaculatorycompl00barr Year: 1972 Limnesia Arrenurus Tyrrellia Group 4 Midea kX* Group 5 Koenikea Mideopsis Hydro - volzia Geayia Fig. 52 Similarity relationships based on the morphology of the ejaculatory com- plex. usual, arched structure formed on either side by the bases of the distal arm sclerites. Although the basic affinity of the Group 2 genera with other water mites is strong, the precise relationship is not clearly indicated by the structur
The ejaculatory complex in water The ejaculatory complex in water mites (Acari:parasitengona) : morphology and potential value for systematics ejaculatorycompl00barr Year: 1972 Limnesia Arrenurus Tyrrellia Group 4 Midea kX* Group 5 Koenikea Mideopsis Hydro - volzia Geayia Fig. 52 Similarity relationships based on the morphology of the ejaculatory com- plex. usual, arched structure formed on either side by the bases of the distal arm sclerites. Although the basic affinity of the Group 2 genera with other water mites is strong, the precise relationship is not clearly indicated by the structure of the EC. But the joining of proximal and distal arm sclerites by sclerotized struts, and the reduction of the distal arms may indicate some similarity to Group 3 (especially Hydrachna). Group 3 consists of 11 genera and is a large and reasonably homo- geneous group with a complex internal structure (Fig. 53). Lebertia occupies a central position in the similarity diagram. Thyas and Hydry- phantes form a nucleus defined by the possession of a well-developed 66
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