Antrelloides atroceracea

Antrelloides atroceracea is a species of cup fungus belonging to the family Pezizaceae, within the order Pezizales. Like other members of this class, it produces cup- or saucer-shaped fruiting bodies (apothecia) that release spores from an exposed, spore-bearing surface. As a fungus, it plays a role in nutrient cycling, likely functioning as a decomposer or symbiotic partner within its ecosystem, breaking down organic matter or forming associations with plant roots or leaf litter in the soils it inhabits.

Its fruiting bodies are typically ephemeral, appearing under specific seasonal and moisture conditions before senescing.

The species has a fragmented distribution, recorded in both Australia and Denmark, an unusual disjunction suggesting a wider historical range or specific ecological requirements met only in isolated regions. It occurs in forest and shrubland habitats, where it likely depends on particular substrate conditions, humidity levels, and associated vegetation communities for fruiting and persistence.

Antrelloides atroceracea is classified as Vulnerable by the IUCN, with a population trend that is decreasing. The primary documented threat is ongoing habitat shifting and alteration, which affects the microhabitat conditions—such as leaf litter composition, canopy cover, and soil moisture—that this fungus depends on for growth and reproduction. As forest and shrubland ecosystems are modified, whether through land conversion, altered fire regimes, or climate-driven vegetation shifts, the specific niches supporting this species become less stable.

No species-specific conservation programs are documented, though broader habitat protection measures within existing forest and shrubland reserves in its range countries may offer indirect benefit. Given its reliance on stable habitat conditions and the ongoing pressures altering both its Australian and Danish ranges, the species' outlook remains uncertain, with continued population decline anticipated absent stabilization of its habitat.