Blackhead worm vs common greasewort

Aporrectodea longa compared with Aneura pinguis

Key Differences

• Blackhead worm is Not Evaluated while common greasewort is Least Concern.

Taxonomic Classification

Rank	Blackhead worm	common greasewort
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Annelida (Segmented Worms)	Marchantiophyta (liverwort)
Class	Clitellata (Clitellata)	Jungermanniopsida (Jungermanniopsida)
Order	Crassiclitellata (Crassiclitellata)	Metzgeriales (Metzgeriales)
Family	Lumbricidae	Aneuraceae
Genus	Aporrectodea	Aneura
Species	Aporrectodea longa	Aneura pinguis

Conservation Status

Blackhead worm

NE — Not Evaluated

common greasewort

LC — Least Concern

Physical Characteristics

Attribute	Blackhead worm	common greasewort
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Blackhead worm

Habitat

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

Range

Distributed across Belgium, Denmark, Norway, Sweden, and United States.

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).

Blackhead worm

The Blackhead worm (Aporrectodea longa) is a species in the genus Aporrectodea. Native to Europe and North America, inhabiting ecosystems characteristic of the region. Distributed across Belgium, Denmark, Norway, Sweden, and United States.

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 5 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden 🇺🇸 United States