Chalk Screw-moss vs Rib-leaf Moss

Tortula vahliana compared with Tortula atrovirens

Key Differences

• Chalk Screw-moss is Vulnerable while Rib-leaf Moss is Not Evaluated.

Taxonomic Classification

Rank	Chalk Screw-moss	Rib-leaf Moss
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Bryophyta	Bryophyta
Class same	Bryopsida (Bryopsida)	Bryopsida (Bryopsida)
Order same	Pottiales (Pottiales)	Pottiales (Pottiales)
Family same	Pottiaceae	Pottiaceae
Genus same	Tortula	Tortula
Species	Tortula vahliana	Tortula atrovirens

Evolutionary Relationship

Chalk Screw-moss and Rib-leaf Moss share a common ancestor at the Genus level: Tortula.

Conservation Status

Chalk Screw-moss

VU — Vulnerable

Rib-leaf Moss

NE — Not Evaluated

Physical Characteristics

Attribute	Chalk Screw-moss	Rib-leaf Moss
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Chalk Screw-moss

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

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

Rib-leaf Moss

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway and Portugal.

Chalk Screw-moss

The Chalk Screw-moss (Tortula vahliana) is a species in the genus Tortula. It is currently classified as Vulnerable 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 🇵🇹 Portugal