Chestnut Lamprey vs Oso Polar

Ichthyomyzon castaneus compared with Ursus maritimus

Key Differences

• Chestnut Lamprey is Least Concern while Oso Polar is Vulnerable.

Taxonomic Classification

Rank	Chestnut Lamprey	Oso Polar
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (cordados)	Chordata (cordados)
Class	Petromyzonti (Petromyzonti)	Mammalia (mamíferos)
Order	Petromyzontiformes (Hyperoartia)	Carnivora (carnívoros)
Family	Petromyzontidae	Ursidae (Bears)
Genus	Ichthyomyzon	Ursus (Bears)
Species	Ichthyomyzon castaneus	Ursus maritimus

Evolutionary Relationship

Chestnut Lamprey and Oso Polar share a common ancestor at the Phylum level: Chordata. (cordados)

Conservation Status

Chestnut Lamprey

LC — Least Concern

Oso Polar

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Chestnut Lamprey	Oso Polar
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Chestnut Lamprey

Oso Polar

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 4 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found in Norway. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Chestnut Lamprey

The Chestnut Lamprey (Ichthyomyzon castaneus) is a species in the genus Ichthyomyzon. It is currently classified as Least Concern on the IUCN Red List.

Oso Polar

El mayor carnivoro terrestre de la Tierra, el oso polar puede superar los 700 kg y se encuentra en el hielo marino del Artico, desde Canada hasta Rusia. Es un mamifero marino altamente especializado que depende del hielo marino para cazar focas anilladas y barbadas. Excelente nadador capaz de cubrir grandes distancias en agua abierta. Clasificado como Vulnerable, sus poblaciones soportan una presion severa por la rapida perdida de hielo marino artico debida al cambio climatico.