brittlestar vs Compressed Flapwort

Amphiura filiformis compared with Nardia compressa

Taxonomic Classification

Rank	brittlestar	Compressed Flapwort
Kingdom	Animalia (hewan)	Plantae (tumbuhan)
Phylum	Echinodermata (Ekinodermata)	Marchantiophyta (Lumut hati)
Class	Ophiuroidea (Ophiuroidea)	Jungermanniopsida (Jungermanniopsida)
Order	Amphilepidida (Amphilepidida)	Jungermanniales (Jungermanniales)
Family	Amphiuridae	Gymnomitriaceae
Genus	Amphiura	Nardia
Species	Amphiura filiformis	Nardia compressa

Conservation Status

brittlestar

LC — Least Concern

Compressed Flapwort

LC — Least Concern

Physical Characteristics

Attribute	brittlestar	Compressed Flapwort
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

brittlestar

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

Compressed Flapwort

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Norway, and Sweden.

brittlestar

The Brittlestar (Amphiura filiformis) is a species in the genus Amphiura. It is currently classified as Least Concern on the IUCN Red List. Native to Europe, inhabiting ecosystems characteristic of the region.

Compressed Flapwort

<em>Nardia compressa</em>, commonly called the Compressed Flapwort, is a leafy liverwort in the family Jungermanniaceae, a lineage of non-vascular land plants (division Marchantiophyta) that diverged from other embryophytes over 400 million years ago. This small, mat-forming bryophyte typically colonizes moist, acidic substrates along stream banks, seepages, and wet rock faces in cool-temperate habitats throughout Europe. Its flattened, overlapping leaves give the plant a compressed appearance, which inspired both its common and scientific names. Like all liverworts, <em>Nardia compressa</em> lacks true vascular tissue and absorbs water and nutrients directly through its leaf surfaces, deriving energy through photosynthesis rather than heterotrophic feeding. The species has been recorded in Belgium, Norway, and Sweden, suggesting an affinity for the moist, boreal and Atlantic climatic zones of northwestern and northern Europe. It is currently assessed as Least Concern by the IUCN, indicating no immediate extinction risk across its known range. Biological traits including individual lifespan, reproductive rates, and specific growth measurements remain poorly documented relative to vascular plant species, though liverworts are generally slow-growing perennial organisms tightly dependent on stable moisture regimes.