New Australian hygrobatids (Acari: Hydrachnidia: Hygrobatidae), with the description of two new genera and three new species Author Smit, Harry text Zootaxa 2009 2114 61 68 journal article 10.5281/zenodo.187947 f385bcdd-3fda-4fb3-88e1-5850aa78ca18 1175-5326 187947 Ioannibates gen. nov. Diagnosis . Dorsum with a large plate and a pair of smaller plates; first leg slightly modified; first anterior pair of acetabula separated from posterior two pairs. Type species : Ioannibates papillosus n. sp. Description . Idiosoma papillate, lateral eyes lying beneath idiosoma. Dorsum with one large plate with postocularia and two pairs of glandularia. In dorsal furrow five more pairs of glandularia, one pair on a small platelet with two wart-like extensions. Gnathosoma not fused with coxal plates. Coxal plates in three groups, first coxal plates fused medially. Posterior of fourth coxal plates extensive sclerotizations. Genital field of male on a large somewhat triangular plate, gonopore ellipsoid. Genital field with three pairs of acetabula, the anterior pair separated from the two posterior pairs. PII and PIII ventrally with large papillae. I-leg-5 slightly modified, anteroventrally with a slightly curved seta. Remarks . The new genus is different from the known hygrobatid genera in the combination of a large dorsal plate with a pair of smaller plates, a slightly modified I-leg-5, the genital field lying on a plate and the first pair of acetabula being separated from the posterior pairs. This warrants a separate generic status. Procorticacarus species have a dorsum also with large and small plates, but males have a different gonopore, and all species have PII with a ventral extension. Moreover, no species have the first leg modified as in the new species. The palp of the species is similar to the palp of Hygrobates , but in this genus the gnathosoma is fused with the coxal plates. Etymology . The genus name is derived from the type locality ( St. John = the prophet Ioannes).