Lambiella aliphatica is a species of crustose lichen in the family Xylographaceae.

The type specimen was collected in the Hoonah-Angoon Census Area of Glacier Bay National Park.

Here it was found at an altitude of 907 m (2,976 ft) growing on an argillite rock in alpine scree.

The specific epithet aliphatica refers to the unidentified fatty acids that are present in the thallus.

It is the first member of genus Lambiella to contain primarily fatty acids in the thallus.