Commerson s Dolphin vs Notched Rustwort

Cephalorhynchus commersonii compared with Marsupella emarginata

Key Differences

• Commerson s Dolphin is Least Concern while Notched Rustwort is Extinct.

Taxonomic Classification

Rank	Commerson s Dolphin	Notched Rustwort
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Marchantiophyta (liverwort)
Class	Mammalia (Mammals)	Jungermanniopsida (Jungermanniopsida)
Order	Cetacea (Whales & Dolphins)	Jungermanniales (Jungermanniales)
Family	Delphinidae (Oceanic Dolphins)	Gymnomitriaceae
Genus	Cephalorhynchus	Marsupella
Species	Cephalorhynchus commersonii	Marsupella emarginata

Conservation Status

Commerson s Dolphin

LC — Least Concern

Notched Rustwort

EX — Extinct

Physical Characteristics

Attribute	Commerson s Dolphin	Notched Rustwort
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Commerson s Dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Notched Rustwort

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 (Colombia).

Commerson s Dolphin

<em>Cephalorhynchus commersonii</em>, commonly known as Commerson's Dolphin, is a small cetacean in the family Delphinidae. This species is classified as Least Concern on the IUCN Red List and is notable for its striking black-and-white coloration, which makes it one of the most visually distinctive dolphin species. Commerson's Dolphins typically inhabit coastal and nearshore marine environments of the Southern Hemisphere, particularly around the Falkland Islands, the southern tip of South America, and a geographically isolated population near the Kerguelen Islands in the Indian Ocean. These dolphins are highly social animals, often observed in small groups engaging in acrobatic behaviors near the surface. They typically feed on fish, squid, and crustaceans, often hunting cooperatively in shallow waters and kelp beds. Their average lifespan is approximately 18 years, and they are known for their fast, energetic swimming. Commerson's Dolphins are sometimes caught as bycatch in fishing nets, posing a localized conservation concern despite their overall Least Concern status.