Cardinal Click Beetle vs Common Nut Clam

Ampedus cardinalis compared with Nuculana pernula

Key Differences

• Cardinal Click Beetle is Critically Endangered while Common Nut Clam is Vulnerable.

Taxonomic Classification

Rank	Cardinal Click Beetle	Common Nut Clam
Kingdom same	Animalia (प्राणी)	Animalia (प्राणी)
Phylum	Arthropoda (सन्धिपाद)	Mollusca (मोलस्का)
Class	Insecta (कीट)	Bivalvia (पटलक्लोमी)
Order	Coleoptera (वर्मपंखी गण)	Nuculanida (Nuculanida)
Family	Elateridae	Nuculanidae
Genus	Ampedus	Nuculana
Species	Ampedus cardinalis	Nuculana pernula

Evolutionary Relationship

Cardinal Click Beetle and Common Nut Clam share a common ancestor at the Kingdom level: Animalia. (प्राणी)

Conservation Status

Cardinal Click Beetle

CR — Critically Endangered

Common Nut Clam

VU — Vulnerable

Physical Characteristics

Attribute	Cardinal Click Beetle	Common Nut Clam
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Cardinal Click Beetle

Habitat

Inhabits temperate coniferous forests within the Palearctic biogeographic realm.

Range

Distributed across Denmark, Norway, Sweden, and Switzerland. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Common Nut Clam

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Cardinal Click Beetle

The Cardinal Click Beetle (Ampedus cardinalis) is a species in the genus Ampedus. It is currently classified as Critically Endangered (CR) on the IUCN Red List. Inhabits temperate coniferous forests within the Palearctic biogeographic realm.

Common Nut Clam

<em>Nuculana pernula</em>, sometimes referred to as a nut clam, is a small marine bivalve mollusk in the family Nuculanidae, part of the subclass Protobranchia. Like other protobranchs, <em>Nuculana pernula</em> is a deposit feeder that typically burrows into fine-grained marine sediments, using its palp proboscides to gather organic detritus and microorganisms from surface sediment layers. It typically inhabits subtidal and deep-water soft-bottom habitats along cold-temperate and boreal Atlantic coasts, with documented occurrences in Denmark, Norway, and Sweden. The species is currently assessed as Vulnerable by the IUCN, indicating that it faces a higher level of extinction risk than related species, potentially reflecting sensitivity to habitat degradation, bottom trawling disturbance, and shifts in sediment quality. Biological traits such as lifespan, body size, and diet remain poorly documented at a standardized population level for this species. <em>Nuculana pernula</em> contributes to benthic ecosystem function through sediment bioturbation and organic matter processing, and its Vulnerable status highlights the importance of protecting deep-sea and subtidal soft-sediment habitats from physical disturbance.

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden