Eaton's shield fern vs Hard Shield Fern

Polystichum scopulinum compared with Polystichum aculeatum

Key Differences

• Eaton's shield fern is Extinct while Hard Shield Fern is Near Threatened.

Taxonomic Classification

Rank	Eaton's shield fern	Hard Shield Fern
Kingdom same	Plantae (植物)	Plantae (植物)
Phylum same	Tracheophyta	Tracheophyta
Class same	Polypodiopsida (ウラボシ綱)	Polypodiopsida (ウラボシ綱)
Order same	Polypodiales (ウラボシ目)	Polypodiales (ウラボシ目)
Family same	Dryopteridaceae	Dryopteridaceae
Genus same	Polystichum	Polystichum
Species	Polystichum scopulinum	Polystichum aculeatum

Evolutionary Relationship

Eaton's shield fern and Hard Shield Fern share a common ancestor at the Genus level: Polystichum.

Conservation Status

Eaton's shield fern

EX — Extinct

Hard Shield Fern

NT — Near Threatened

Physical Characteristics

Attribute	Eaton's shield fern	Hard Shield Fern
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Eaton's shield fern

Habitat

Typically found in moist, shaded forest floors and tropical canopies.

Range

Found in Canada.

Hard Shield Fern

Habitat

Typically found in moist, shaded forest floors and tropical canopies.

Range

Distributed across Belgium, Denmark, Norway, Sweden, and United States. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.