Chalk Screw-moss vs common greasewort

Tortula vahliana compared with Aneura pinguis

Key Differences

• Chalk Screw-moss is Vulnerable while common greasewort is Least Concern.

Taxonomic Classification

Rank	Chalk Screw-moss	common greasewort
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum	Bryophyta	Marchantiophyta (liverwort)
Class	Bryopsida (Bryopsida)	Jungermanniopsida (Jungermanniopsida)
Order	Pottiales (Pottiales)	Metzgeriales (Metzgeriales)
Family	Pottiaceae	Aneuraceae
Genus	Tortula	Aneura
Species	Tortula vahliana	Aneura pinguis

Evolutionary Relationship

Chalk Screw-moss and common greasewort share a common ancestor at the Kingdom level: Plantae. (Plants)

Conservation Status

Chalk Screw-moss

VU — Vulnerable

common greasewort

LC — Least Concern

Physical Characteristics

Attribute	Chalk Screw-moss	common greasewort
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.

common greasewort

Habitat

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

Range

Widely distributed across Asia (Taiwan), Europe (6 countries), North America (United States), and South America (Brazil, Colombia).

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.

common greasewort

<em>Aneura pinguis</em>, commonly known as common greasewort, is a liverwort belonging to the genus Aneura within the family Aneuraceae. This cryptogamic plant inhabits ecosystems across Asia, Europe, and North America, thriving in moist or waterlogged environments. Its range encompasses Taiwan in Asia, six European countries, the United States in North America, and Brazil and Colombia in South America, indicating a broad geographic distribution across multiple continents. Common greasewort is assessed as Least Concern on the IUCN Red List. The species typically forms flat, ribbon-like thalli in damp habitats such as stream banks, wet rocks, and boggy ground. Biological traits of this species remain poorly documented in the scientific literature.

Shared Countries

Both species can be found in 3 countries:

🇧🇪 Belgium 🇳🇴 Norway 🇵🇹 Portugal