Alder vs Holt's Scalewort

Alnus glutinosa compared with Radula holtii

Key Differences

• Alder is Least Concern while Holt's Scalewort is Near Threatened.

Taxonomic Classification

Rank	Alder	Holt's Scalewort
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum	Magnoliophyta (Flowering Plants)	Marchantiophyta (liverwort)
Class	Magnoliopsida (Dicots)	Jungermanniopsida (Jungermanniopsida)
Order	Fagales (Beeches & Oaks)	Porellales (Porellales)
Family	Betulaceae	Radulaceae
Genus	Alnus	Radula
Species	Alnus glutinosa	Radula holtii

Evolutionary Relationship

Alder and Holt's Scalewort share a common ancestor at the Kingdom level: Plantae. (Plants)

Conservation Status

Alder

LC — Least Concern

Holt's Scalewort

NT — Near Threatened

Physical Characteristics

Attribute	Alder	Holt's Scalewort
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Alder

Habitat

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

Range

Widely distributed across Africa (South Africa), Asia (India, Japan), Europe (6 countries), North America (Canada, United States), Oceania and the Pacific (Australia, New Zealand), and South America (Chile).

Holt's Scalewort

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway and Portugal. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Alder

The Alder (Alnus glutinosa) is a species in the genus Alnus. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Shared Countries

Both species can be found in 2 countries:

🇳🇴 Norway 🇵🇹 Portugal