Rheophilic water mites from southern Argentina, with the description of one new genus and three new species (Acari: Hydrachnidia) Author Smit, Harry text Zootaxa 2002 103 1 23 journal article 10.5281/zenodo.156012 c7378212-e748-458e-bf75-f8eef232ecb4 1175­5326 156012 Andesobates n. gen. Diagnosis Genital plate of male very large, with three pairs of widely separated acetabula; fourth legs inserted far posteriorly. Type species Andesobates longipalpis sp. nov. Description Dorsum without platelets. Capitulum separated from body. First coxal plates separated medially. Third coxal plates narrowed medially. Cx 4 located near suture line of third and fourth coxal plates. Fourth coxal plates long, extending far posteriorly. Fourth legs therefore inserted far posteriorly. Three pairs of widely separated acetabula, lying on a large genital field. Remarks The new genus is characterised by its very large genital field. Such a large genital field is unusual within the family Hygrobatidae . Moreover, the far posterior insertion of the fourth legs is also unusual. In a number of South­American genera a large genital field can be found (although not as large as in the new genus), e.g. Eocorticacarus Besch and Mapuchacarus Besch. Moreover , these genera have incomplete suture lines of the coxal plates and normal shaped fourth coxal plates.