New species of oribatid mites (Acari, Oribatida) of the genera Ommatocepheus (Cepheusidae) and Eremella (Eremellidae) from Mexico

Two new species of oribatid mites are described: Ommatocepheus quetzalli Revelo & Martínez sp. nov. and Eremella (Licnocepheus) cochlearia Revelo & Martínez sp. nov., both collected from bark of Abies religiosa in Monte Tlaloc, Mexico. The genus Ommatocepheus is reported for the first time in Mexico and the Neotropical region. Ommatocepheus quetzalli sp. nov. is distinguished from close related species by the size of adanal setae, shape and size of the interlamellar setae, and the thickness of the lamellar protrusions.

A brief description of the tritonymph and dichotomous keys are provided for all species of the genus Ommatocepheus. Eremella (Licnocepheus) cochlearia sp. nov. differs from E. (Licnocepheus) matildebellae Mahunka & Palacios Vargas, 1995, by its cymbiform notogastral, lamellar, and interlamellar setae, short and globose bothridial seta, and smooth ventral tegument.