Corneriella is a genus of fungi in the family Tricholomataceae.
The genus contains two species known from the United States and Thailand, and at least four others have been detected by DNA sequencing.
[1] Corneriella has a tricholomatoid stature and gills that are occasionally forked and have sinuate, adnexed or decurrent attachment.
When young, the gills are white, however they darken with age.
Cheilocystidia are conspicuous and have thin walls and various forms.