Calosima munroei is a moth in the family Blastobasidae. It is found in the Marin and Contra Costa counties of coastal California.
The length of the forewings is 7.4–9 mm.[1]
Larvae have been reared from cones of Cupressus goveniana, Cupressus sargenti and also from dead willow.
The species is named in honor of Eugene Munroe.