Chalk Screw-moss vs Dog Screw-moss

Tortula vahliana compared with Tortula canescens

Taxonomic Classification

Rank	Chalk Screw-moss	Dog Screw-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 canescens

Evolutionary Relationship

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

Conservation Status

Chalk Screw-moss

VU — Vulnerable

Dog Screw-moss

VU — Vulnerable

Physical Characteristics

Attribute	Chalk Screw-moss	Dog Screw-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.

Dog Screw-moss

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

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

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