coast amaranth vs tiny risso snail

Amaranthus pumilus compared with Rissoa parva

Key Differences

• coast amaranth is Extinct while tiny risso snail is Least Concern.

Taxonomic Classification

Rank	coast amaranth	tiny risso snail
Kingdom	Plantae (식물)	Animalia (동물)
Phylum	Magnoliophyta (피자식물문)	Mollusca (연체동물)
Class	Magnoliopsida (목련강)	Gastropoda (복족강)
Order	Caryophyllales (석죽목)	Littorinimorpha (총알고둥류)
Family	Amaranthaceae	Rissoidae
Genus	Amaranthus	Rissoa
Species	Amaranthus pumilus	Rissoa parva

Conservation Status

coast amaranth

EX — Extinct

tiny risso snail

LC — Least Concern

Physical Characteristics

Attribute	coast amaranth	tiny risso snail
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

coast amaranth

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Found in Japan.

tiny risso snail

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

coast amaranth

Coast amaranth (Amaranthus pumilus) is an annual herb in the family Amaranthaceae, native to the Atlantic and Gulf coasts of the eastern United States, where it once grew on coastal foredunes, beach strand, and shell-hash substrates above the high tide line from New York south to South Carolina. It is a low-growing, fleshy plant with small, rounded leaves and inconspicuous green flowers typical of the genus. Coast amaranth is assessed as Extinct in the Wild by the IUCN, as it has not been reliably documented from wild populations since the mid-20th century; the last confirmed collections date to the 1960s. The species' decline and likely extinction resulted from intense human pressure on Atlantic coastal habitats through shoreline development, beach stabilisation, vehicular traffic on beaches, and increased storm frequency disrupting pioneer dune vegetation. It is federally listed as Threatened in the United States, though this listing predates confirmed extinction in the wild. A small number of ex-situ accessions may exist in botanical garden collections. Genetic material and seed banking efforts represent the only remaining conservation options for this critically reduced species.