Andersson's arctic moss vs Thread Weed

Arctoa anderssonii compared with Ulva compressa

Key Differences

• Andersson's arctic moss is Endangered while Thread Weed is Least Concern.

Taxonomic Classification

Rank	Andersson's arctic moss	Thread Weed
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum	Bryophyta	Chlorophyta (Chlorophyta)
Class	Bryopsida (Bryopsida)	Ulvophyceae (Ulvophyceae)
Order	Dicranales (Dicranales)	Ulvales (Ulvales)
Family	Rhabdoweisiaceae	Ulvaceae
Genus	Arctoa	Ulva
Species	Arctoa anderssonii	Ulva compressa

Evolutionary Relationship

Andersson's arctic moss and Thread Weed share a common ancestor at the Kingdom level: Plantae. (Plants)

Conservation Status

Andersson's arctic moss

EN — Endangered

Thread Weed

LC — Least Concern

Physical Characteristics

Attribute	Andersson's arctic moss	Thread Weed
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Andersson's arctic moss

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway and Sweden. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Thread Weed

Habitat

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

Range

Widely distributed across Asia (Taiwan), Europe (4 countries), Oceania and the Pacific (New Zealand), and South America (Brazil).

Andersson's arctic moss

The Andersson's arctic moss (Arctoa anderssonii) is a species in the genus Arctoa. It is currently classified as Endangered on the IUCN Red List. Native to Europe, inhabiting ecosystems characteristic of the region.

Shared Countries

Both species can be found in 2 countries:

🇳🇴 Norway 🇸🇪 Sweden