Collared Worm Salamander vs common greasewort

Oedipina collaris compared with Aneura pinguis

Key Differences

• Collared Worm Salamander is Data Deficient while common greasewort is Least Concern.

Taxonomic Classification

Rank	Collared Worm Salamander	common greasewort
Kingdom	Animalia (प्राणी)	Plantae (पादप)
Phylum	Chordata (रज्जुकी)	Marchantiophyta (liverwort)
Class	Amphibia (उभयचर)	Jungermanniopsida (Jungermanniopsida)
Order	Caudata (सैलामैंडर)	Metzgeriales (Metzgeriales)
Family	Plethodontidae	Aneuraceae
Genus	Oedipina	Aneura
Species	Oedipina collaris	Aneura pinguis

Conservation Status

Collared Worm Salamander

DD — Data Deficient

common greasewort

LC — Least Concern

Physical Characteristics

Attribute	Collared Worm Salamander	common greasewort
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Collared Worm Salamander

Habitat

Typically found in freshwater habitats, moist forests, and wetlands.

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).

Collared Worm Salamander

The Collared Worm Salamander, known scientifically as <em>Oedipina collaris</em>, is a slender, elongated salamander belonging to the family Plethodontidae, the lungless salamanders. <em>Oedipina collaris</em> is characterised by its worm-like body form, extremely elongated trunk with many vertebrae, short limbs, and a long tail — morphological features that adapt the species for a burrowing or semi-fossorial lifestyle. As a plethodontid salamander, <em>Oedipina collaris</em> lacks lungs and respires entirely through its moist skin, making it highly dependent on humid environments. The species inhabits freshwater habitats, moist forests, and wetlands. Detailed biological traits including typical lifespan, body length, and weight are poorly documented for this species in available literature. The Collared Worm Salamander is currently assessed as Data Deficient on the IUCN Red List, indicating that insufficient information is available to determine its conservation status accurately, and further research on the species' distribution and population trends is required.

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.