| abstract | Eleven species of marine mites (Halacaroidea) are recorded from intertidal and subtidal collections made along the coast of California. Four new species Copidognathus spinifer sp. nov., Copidognathus ilsebartschi sp. nov., Agaue variabilis sp. nov., and Halacarus newelli sp. nov. are described. Agaue californica (Hall) is completely redescribed. Agauopsis newelli Krantz and Halacarus magniporus Krantz, new records for California, are diagnozed and described. Agauopsis curvata Krantz is diagnozed and further described. The juvenile stages of Copidognathus curtus Hall are described. The range of Agauopsis filirostris MacQuitty is extended within California. A tabular key to the Californian species of Copidognathus is given. The distribution of the halacaroids in California is compared to that of other fauna. |