Type material and new occurrences of marine mites (Halacaridae) from São Paulo State, Brazil, housed at “Centro de Coleções Taxonômicas da UFMG”, and notes on its taxonomy.

Halacarid mites are a diversified secondarily marine clade comprising more than one thousand species. Despite recent progress, it may be regarded as a neglected group of animals in Brazil, with only 36 species reported from Brazilian coastline, 26 of them from São Paulo State, belonging to 12 genera. Original description and records included material deposited in personal collections now housed at the Acarological Collection at “Centro de Coleções Taxonômicas da UFMG”, acronym UFMG-AC. In addition to individuals employed in taxonomcal studies, other individuals deposited in this collection are reported, specially those obtained by researchers of BIOTA-FAPESP program, making the information available to the scientific community. Problems related to the identity of Agauopsis brevipalpus (Trouessart, 1889), Copidognathus floridensis (Newell, 1947) and Rhombognathus levigatoides Pepato & Rocha, 2007 are presented, and distribution of Simognathus fuscus Viets, 1936 is discussed under the light of molecular data. We concluded that Brazilian occurrences of Agauopsis brevipalpus must be rejected, and confirm that Simognathus platyaspis Otto, 2000 must be regarded as a junior synonym of S. fuscus.