Myriotrema subanamaliense is a species of corticolous (bark-dwelling) lichen in the family Graphidaceae.

Found in Thailand, it was formally described as a new species in 2002 by lichenologists Natsurang Homchantara and Brian J. Coppins.

[1] Myriotrema subanamaliense has a shiny and smooth, greenish-grey thallus with a dense cortex and a white medulla.

It has numerous individual round-pored apothecia, which are immersed in the medulla.

The specific epithet refers to its resemblance to Myriotrema anamaliense, a lookalike with much larger ascospores.