Common Tarcrust vs Gray-cowled Wood-Rail

Diatrype stigma compared with Aramides cajanea

Key Differences

Common Tarcrust is Not Evaluated while Gray-cowled Wood-Rail is Least Concern.

Taxonomic Classification

Rank	Common Tarcrust	Gray-cowled Wood-Rail
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Ascomycota (Sac Fungi)	Chordata (Chordates)
Class	Sordariomycetes (Sordariomycetes)	Aves (Birds)
Order	Xylariales (Xylariales)	Gruiformes (Gruiformes)
Family	Diatrypaceae	Rallidae
Genus	Diatrype	Aramides
Species	Diatrype stigma	Aramides cajanea

Conservation Status

Common Tarcrust

NE — Not Evaluated

Gray-cowled Wood-Rail

LC — Least Concern

Physical Characteristics

Attribute	Common Tarcrust	Gray-cowled Wood-Rail
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.

Gray-cowled Wood-Rail

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Distributed across Colombia, Ecuador, Norway, and Venezuela.

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.

Gray-cowled Wood-Rail

Gray-cowled Wood-Rail (Aramides cajanea) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.