Aspen Roller vs

Ancylis laetana compared with Clostridium tertium

Key Differences

• Aspen Roller is Least Concern while is Not Evaluated.

Taxonomic Classification

Rank	Aspen Roller
Kingdom	Animalia (Animals)	Bacteria (Bacteria)
Phylum	Arthropoda (Arthropods)	Firmicutes_A
Class	Insecta (Insects)	Clostridia (Clostridia)
Order	Lepidoptera (Butterflies & Moths)	Clostridiales (Clostridiales)
Family	Tortricidae	Clostridiaceae
Genus	Ancylis	Clostridium
Species	Ancylis laetana	Clostridium tertium

Conservation Status

Aspen Roller

LC — Least Concern

NE — Not Evaluated

Physical Characteristics

Attribute	Aspen Roller
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Aspen Roller

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

Habitat

Native to Asia, inhabiting ecosystems characteristic of the region.

Range

Found in Taiwan.

Aspen Roller

The Aspen Roller (Ancylis laetana) is a species in the genus Ancylis. It is currently classified as Least Concern on the IUCN Red List. Typically found in virtually all terrestrial and freshwater habitats. Distributed across Belgium, Denmark, Norway, and Sweden.

Clostridium tertium is an aerotolerant, endospore-forming bacterium in the family Clostridiaceae notable among clostridia for its ability to grow in the presence of atmospheric oxygen, despite being classified within the genus of strictly anaerobic organisms. Its relative aerotolerance distinguishes it from most genus members and contributes to its occasional isolation from clinical sources. C. tertium is considered an opportunistic pathogen, causing bacteremia primarily in immunocompromised patients including those undergoing chemotherapy, with neutropenia as a key risk factor. The bacterium has been isolated from soil, water, and the gastrointestinal tract of animals and humans. Despite causing bacteremia and occasionally more invasive infections, C. tertium does not produce recognized exotoxins comparable to the major histotoxic clostridia, and its pathogenic mechanisms involve host immune evasion rather than direct toxin-mediated tissue destruction. Clinically, C. tertium bacteremia carries significant mortality in neutropenic patients but responds to beta-lactam antibiotics unlike C. difficile or C. perfringens infections. Its natural aerotolerance makes it unusual within the Clostridium genus and raises evolutionary questions about the anaerobic ancestry of this lineage.