Annamese Langur vs Cliff Scalewort

Trachypithecus margarita compared with Porella cordaeana

Key Differences

• Annamese Langur is Endangered while Cliff Scalewort is Least Concern.

Taxonomic Classification

Rank	Annamese Langur	Cliff Scalewort
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Marchantiophyta (liverwort)
Class	Mammalia (Mammals)	Jungermanniopsida (Jungermanniopsida)
Order	Primates (Primates)	Porellales (Porellales)
Family	Cercopithecidae (Old World Monkeys)	Porellaceae
Genus	Trachypithecus	Porella
Species	Trachypithecus margarita	Porella cordaeana

Conservation Status

Annamese Langur

EN — Endangered

Cliff Scalewort

LC — Least Concern

Physical Characteristics

Attribute	Annamese Langur	Cliff Scalewort
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Annamese Langur

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Cliff Scalewort

Habitat

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

Range

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

Annamese Langur

The Annamese Langur (Trachypithecus margarita) is a species in the genus Trachypithecus. It is currently classified as Endangered on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

Cliff Scalewort

Cliff Scalewort, Porella obtusata, is a leafy liverwort in the family Porellaceae found on cliff faces, shaded rock surfaces, and the bark of trees in moist, humid environments across Europe and North America. Porella is one of the most diverse and widely distributed leafy liverwort genera, with species adapted to a range of substrates from bark and rock to soil in forests and coastal habitats. Cliff Scalewort forms flat, overlapping mats of small, scale-like leaves arranged in two lateral rows and a row of smaller underleaves, creating a texture that gives the plant its common name. The green to brownish-green plants are tightly appressed to the surface, extracting moisture from rainfall and condensation. Liverworts in this family reproduce sexually when conditions are favorable, producing small capsules on delicate setae, as well as vegetatively through fragmentation. Porella species on cliff faces are sensitive to air pollution, particularly sulfur dioxide, and have declined in many industrial regions of Europe, recovering more recently as air quality has improved. They serve as indicators of habitat continuity and air quality in ecological assessments. Cliff Scalewort is not globally threatened but may be locally rare in heavily polluted or drought-prone areas.