Common Tarcrust vs Willow Barkspot

Diatrype stigma compared with Diatrype bullata

Key Differences

• Common Tarcrust is Not Evaluated while Willow Barkspot is Least Concern.

Taxonomic Classification

Rank	Common Tarcrust	Willow Barkspot
Kingdom same	Fungi (เห็ดรา)	Fungi (เห็ดรา)
Phylum same	Ascomycota (Sac Fungi)	Ascomycota (Sac Fungi)
Class same	Sordariomycetes (Sordariomycetes)	Sordariomycetes (Sordariomycetes)
Order same	Xylariales (Xylariales)	Xylariales (Xylariales)
Family same	Diatrypaceae	Diatrypaceae
Genus same	Diatrype	Diatrype
Species	Diatrype stigma	Diatrype bullata

Evolutionary Relationship

Common Tarcrust and Willow Barkspot share a common ancestor at the Genus level: Diatrype.

Conservation Status

Common Tarcrust

NE — Not Evaluated

Willow Barkspot

LC — Least Concern

Physical Characteristics

Attribute	Common Tarcrust	Willow Barkspot
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Common Tarcrust

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

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

Willow Barkspot

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

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.

Shared Countries

Both species can be found in 4 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden