Brown Rat vs Divided Tunicate

Rattus norvegicus compared with Styela canopus

Key Differences

• Brown Rat is Least Concern while Divided Tunicate is Not Evaluated.

Taxonomic Classification

Rank	Brown Rat	Divided Tunicate
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Ascidiacea (Ascidiacea)
Order	Rodentia (Rodents)	Stolidobranchia (Stolidobranchia)
Family	Muridae (Mice & Rats)	Styelidae
Genus	Rattus	Styela
Species	Rattus norvegicus	Styela canopus

Evolutionary Relationship

Brown Rat and Divided Tunicate share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Brown Rat

LC — Least Concern

Divided Tunicate

NE — Not Evaluated

Physical Characteristics

Attribute	Brown Rat	Divided Tunicate
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brown Rat

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 10 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (11 countries), Asia (15 countries), Europe (41 countries), North America (16 countries), Oceania and the Pacific (10 countries), and South America (10 countries).

Divided Tunicate

Habitat

Native to Africa and Asia and Europe, inhabiting ecosystems characteristic of the region.

Range

Widely distributed across Africa (5 countries), Asia (Lebanon), Europe (4 countries), North America (7 countries), Oceania and the Pacific (New Zealand, Samoa), and South America (Brazil).

Brown Rat

Brown Rat (Rattus norvegicus) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.

Shared Countries

Both species can be found in 16 countries:

🇧🇷 Brazil 🇨🇻 Cabo Verde 🇨🇦 Canada 🇨🇺 Cuba 🇪🇬 Egypt 🇮🇹 Italy 🇯🇲 Jamaica 🇲🇽 Mexico 🇳🇿 New Zealand 🇵🇹 Portugal 🇼🇸 Samoa 🇸🇳 Senegal 🇿🇦 South Africa 🇪🇸 Spain 🇬🇧 United Kingdom 🇺🇸 United States