cavernous crystalwort vs common greasewort

Riccia cavernosa compared with Aneura pinguis

Key Differences

• cavernous crystalwort is Endangered while common greasewort is Least Concern.

Taxonomic Classification

Rank	cavernous crystalwort	common greasewort
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Marchantiophyta (liverwort)	Marchantiophyta (liverwort)
Class	Marchantiopsida (Marchantiopsida)	Jungermanniopsida (Jungermanniopsida)
Order	Marchantiales (Marchantiales)	Metzgeriales (Metzgeriales)
Family	Ricciaceae	Aneuraceae
Genus	Riccia	Aneura
Species	Riccia cavernosa	Aneura pinguis

Evolutionary Relationship

cavernous crystalwort and common greasewort share a common ancestor at the Phylum level: Marchantiophyta. (liverwort)

Conservation Status

cavernous crystalwort

EN — Endangered

common greasewort

LC — Least Concern

Physical Characteristics

Attribute	cavernous crystalwort	common greasewort
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

cavernous crystalwort

Habitat

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

Range

Widely distributed across Europe (6 countries), North America (United States), and South America (Brazil). Currently classified as Endangered 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).

cavernous crystalwort

The Cavernous crystalwort (Riccia cavernosa) is a species in the genus Riccia. It is currently classified as Endangered on the IUCN Red List. Native to Europe and North America and South America, 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 8 countries:

🇧🇪 Belgium 🇧🇷 Brazil 🇩🇰 Denmark 🇱🇺 Luxembourg 🇳🇴 Norway 🇵🇹 Portugal 🇸🇪 Sweden 🇺🇸 United States