Bitter Scalewort vs Bridge Roller

Porella arboris-vitae compared with Ancylis uncella

Key Differences

• Bitter Scalewort is Vulnerable while Bridge Roller is Least Concern.

Taxonomic Classification

Rank	Bitter Scalewort	Bridge Roller
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Marchantiophyta (liverwort)	Arthropoda (Arthropods)
Class	Jungermanniopsida (Jungermanniopsida)	Insecta (Insects)
Order	Porellales (Porellales)	Lepidoptera (Butterflies & Moths)
Family	Porellaceae	Tortricidae
Genus	Porella	Ancylis
Species	Porella arboris-vitae	Ancylis uncella

Conservation Status

Bitter Scalewort

VU — Vulnerable

Bridge Roller

LC — Least Concern

Physical Characteristics

Attribute	Bitter Scalewort	Bridge Roller
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bitter Scalewort

Habitat

Native to Asia and Europe, inhabiting ecosystems characteristic of the region.

Range

Found across Asia (Taiwan) and Europe (5 countries). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Bridge Roller

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

Bitter Scalewort

The Bitter Scalewort (Porella arboris-vitae) is a species in the genus Porella. It is currently classified as Vulnerable on the IUCN Red List. Native to Asia and Europe, inhabiting ecosystems characteristic of the region.

Bridge Roller

The Bridge Roller (Ancylis uncella) is a species in the genus Ancylis. It is currently classified as Least Concern on the IUCN Red List. Typically found in virtually all terrestrial and freshwater habitats.

Shared Countries

Both species can be found in 4 countries:

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