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A first occurrence of the genus  Meliosma  (Sabiaceae) is reported from the upper Eocene of the Maoming Basin of South China. This fossil is one of the oldest reliable records of the genus within its modern center of diversity. Fossil leaves are assigned to a new species,  Meliosma eosinica  sp. nov. based on leaf morphology and epidermal characters. The leaf epidermal anatomy of fossil  Meliosma  is illustrated for the first time. We also provide the first SEM observation of pollen grains associated with  Meliosma . This study also documents an occurrence of mites within the leaf domatia previously unknown from the fossil record. We presume that the studied mite belongs to the superfamily Eupodoidea (Arthropoda), and probably the family Eupodidae, which comprises very small soft-bodied cosmopolitan mites occupying a wide range of terrestrial habitats. Additionally, we analyze the damage types on the fossil leaves of  Meliosma . They exhibit exclusively external foliage feeding damage caused by arthropods and traces of probable fungal infection. A review of currently known fossil occurrences of leaves, fruits, and wood of  Meliosma  provides evidence for the geological and geographical distribution of the genus.

Fossil Leaves of Meliosma (Sabiaceae) With Associated Pollen and a Eupodid Mite From the Eocene of Maoming Basin, South China