Bad-smelling Alkanet vs common earthworm

Alkanna maleolens compared with Lumbricus terrestris

Key Differences

• Bad-smelling Alkanet is Critically Endangered while common earthworm is Not Evaluated.

Taxonomic Classification

Rank	Bad-smelling Alkanet	common earthworm
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Annelida (Segmented Worms)
Class	Magnoliopsida (Dicots)	Clitellata (Clitellata)
Order	Boraginales (Boraginales)	Crassiclitellata (Crassiclitellata)
Family	Boraginaceae	Lumbricidae
Genus	Alkanna	Lumbricus
Species	Alkanna maleolens	Lumbricus terrestris

Conservation Status

Bad-smelling Alkanet

CR — Critically Endangered

common earthworm

NE — Not Evaluated

Physical Characteristics

Attribute	Bad-smelling Alkanet	common earthworm
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bad-smelling Alkanet

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

common earthworm

Habitat

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

Range

Found across Europe (6 countries) and North America (United States).

Bad-smelling Alkanet

The Bad-smelling Alkanet (Alkanna maleolens) is a species in the genus Alkanna. It is currently classified as Critically Endangered on the IUCN Red List. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

common earthworm

<em>Lumbricus terrestris</em>, the common earthworm, is one of the most ecologically significant invertebrates in temperate soils and is native to Europe, with introduced populations established across North America and other regions globally. The species is not evaluated by the IUCN Red List. <em>Lumbricus terrestris</em> belongs to the family Lumbricidae and is widely distributed across Belgium, Denmark, Germany, Norway, Sweden, the United Kingdom, the United States, and other countries in its introduced range. It typically inhabits moist, organic-rich soils in gardens, agricultural fields, woodlands, and grasslands, burrowing deep into the substrate and surfacing at night or after rainfall to feed on decomposing leaf litter and soil organic matter. As a detritivore and ecosystem engineer, the common earthworm dramatically improves soil structure, aeration, drainage, and fertility through its burrowing activity and the production of nutrient-rich castings. It is a critical food source for a wide range of predators including birds, mammals, amphibians, and invertebrates. Charles Darwin extensively studied <em>Lumbricus terrestris</em> and recognized its profound role in soil formation and ecosystem functioning in his 1881 publication on the subject. Biological traits of this species remain poorly documented in the scientific literature.