California Red Fir vs Common Tarcrust

Abies magnifica compared with Diatrype stigma

Key Differences

California Red Fir is Least Concern while Common Tarcrust is Not Evaluated.

Taxonomic Classification

Rank	California Red Fir	Common Tarcrust
Kingdom	Plantae (Plants)	Fungi (Fungi)
Phylum	Coniferophyta (Conifers)	Ascomycota (Sac Fungi)
Class	Pinopsida (Conifers)	Sordariomycetes (Sordariomycetes)
Order	Pinales (Pines & Allies)	Xylariales (Xylariales)
Family	Pinaceae (Pine Family)	Diatrypaceae
Genus	Abies	Diatrype
Species	Abies magnifica	Diatrype stigma

Conservation Status

California Red Fir

LC — Least Concern

Common Tarcrust

NE — Not Evaluated

Physical Characteristics

Attribute	California Red Fir	Common Tarcrust
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

California Red Fir

Habitat

Typically found in temperate and boreal forests, often at higher elevations.

Range

Distributed across Norway and Sweden.

Common Tarcrust

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Denmark, Norway, Portugal, and Sweden.

California Red Fir

The California Red Fir (Abies magnifica) is a species in the genus Abies. It is currently classified as Least Concern on the IUCN Red List. Typically found in temperate and boreal forests, often at higher elevations.

Common Tarcrust

<em>Diatrype stigma</em>, the common tarcrust, is a saprotrophic fungus in the family Diatrypaceae, found across Belgium, Denmark, Norway, Portugal, and Sweden, as well as more broadly in Europe and temperate regions globally. It grows as a crust-like, charcoal-black stromata on the dead bark and branches of deciduous hardwoods, particularly hazel, beech, and alder. The fruiting bodies are typically flat to slightly raised, dark gray to black patches that contain numerous embedded perithecia in which ascospores are produced. This fungus plays an important ecological role as a decomposer, breaking down dead woody material and recycling nutrients in forest ecosystems. It is Not Evaluated on the IUCN Red List; given its broad distribution on common substrates, it is generally considered widespread. The species reproduces via wind-dispersed ascospores released from the perithecia. Diet, as a saprotrophic organism, consists of dead organic woody matter. Biological traits such as colony growth rates, spore output, and longevity remain poorly documented in standardized quantitative assessments.