Brownfish vs Common Tarcrust

Actinopyga echinites compared with Diatrype stigma

Key Differences

• Brownfish is Vulnerable while Common Tarcrust is Not Evaluated.

Taxonomic Classification

Rank	Brownfish	Common Tarcrust
Kingdom	Animalia (Animals)	Fungi (Fungi)
Phylum	Echinodermata (Echinoderms)	Ascomycota (Sac Fungi)
Class	Holothuroidea (Holothuroidea)	Sordariomycetes (Sordariomycetes)
Order	Holothuriida (Holothuriida)	Xylariales (Xylariales)
Family	Holothuriidae	Diatrypaceae
Genus	Actinopyga	Diatrype
Species	Actinopyga echinites	Diatrype stigma

Conservation Status

Brownfish

VU — Vulnerable

Common Tarcrust

NE — Not Evaluated

Physical Characteristics

Attribute	Brownfish	Common Tarcrust
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brownfish

Habitat

Native to Asia, inhabiting ecosystems characteristic of the region.

Range

Found in Taiwan. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Common Tarcrust

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

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

Brownfish

The Brownfish (Actinopyga echinites) is a species in the genus Actinopyga. It is currently classified as Vulnerable on the IUCN Red List. Native to Asia, inhabiting ecosystems characteristic of the region.

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.