Ocellularia subleucina

{{Short description|Species of lichen}}

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| taxon = Ocellularia subleucina

| authority = Homchant. & Coppins (2002)

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Ocellularia subleucina is a species of corticolous (bark-dwelling) lichen in the family Graphidaceae. Found in south-eastern Thailand, it was formally described as a new species in 2002 by lichenologists Natsurang Homchantara and Brian J. Coppins. The type specimen was collected in Khao Khitchakut National Park (Chanthaburi Province); here it was found growing on trees in a lowland forest at an elevation of {{convert|400|m|ft|abbr=on}}. The lichen has a smooth to finely wrinkled, grey olivaceous thallus with a dense cortex and a white medulla. It does not contain any lichen substances. The specific epithet subleucina refers to its similarity with Ocellularia leucina, a lookalike species with smaller ascospores that contains psoromic acid.