[9] A molecular phylogenetics analysis based on nuclear rDNA sequences from a broader sample size underscored the genetic difference between C. corynellum and C. viride.

[8] Found scattered across parts of Europe, North America, and Asia, Calicium corynellum prefers specific environmental conditions.

[10] This preference for rocky habitats differentiates it from many others in the same genus that grow on trees or soil, but also highlights its vulnerability to changes in its microenvironment, such as alterations in humidity and shading due to ecological changes or human activities.

Ongoing evaluations for inclusion in the red list of lichens in Spain and Portugal emphasise the need for careful monitoring and conservation measures.

As a primary coloniser, it plays a role in soil formation by breaking down rock surfaces and incorporating organic matter into the mineral substrate.