Creatures in Crisis
Photograph of Ellen Clark's crayfish (Euastacus clarkae), recorded as Endangered
Ellen Clark's crayfish (Euastacus clarkae). Image via Wikimedia Commons.

Endangered

Ellen Clark's crayfish

Euastacus clarkae

Ellen Clark's crayfish was named by Morgan "in respect of Ellen Clark’s pioneering parastacid studies".

Status
Endangered
Scientific name
Euastacus clarkae
Taxonomy
Malacostraca · Decapoda · Parastacidae · Euastacus

The spiny crayfish

Ellen Clark's crayfish is a spiny crayfish in the family Parastacidae (order Decapoda) — Euastacus clarkae.

Range and habitat

It is restricted to headwater reaches of highland streams draining the plateau and feeding the Hastings and Forbes rivers, at elevations ranging from 670–1,150 metres (2,200–3,770 ft) asl. The species is assessed as "Endangered" based on an extent of occurrence (EOO) of 198 square kilometres (76 sq mi), an area of occupancy (AOO) of 68 square kilometres (26 sq mi) occurrence at one to two threat-based locations and a speculated decline in area, extent and quality of habitat due to climate change.

Pins are Wikidata “endemic to” fields. Orange dots, when present, are GBIF occurrence tiles — survey bias included.

Habits

Freshwater crayfishes and crabs walk the bed. Dams, silt, and introduced species cut a drainage into fragments they cannot cross.

Crayfishes and crabs need cover and clean water. A named form from one creek is not interchangeable with the next drainage.

In crisis

Ellen Clark's crayfish is Endangered on this catalog because that is the IUCN category stored on Wikidata. Confirm the official criteria and any later count on iucnredlist.org.

Sources

Written for this catalog from the English Wikipedia article on Ellen Clark's crayfish, Wikidata item Q29025045. Family and order context is original field-guide writing about the group, not a copied assessment of this one species. Wikipedia text is CC BY-SA. Not an IUCN assessment. Counts, when quoted, can change — confirm them on the recovery programme and on iucnredlist.org.

Photograph via Wikimedia Commons. Wikipedia · Wikidata · IUCN Red List.

Same genus

Photograph of Euastacus setosus (Euastacus setosus), recorded as Critically EndangeredCR

Euastacus setosus

Euastacus setosus
Photograph of Balan spiny crayfish (Euastacus balanensis), recorded as EndangeredEN

Balan spiny crayfish

Euastacus balanensis
Photograph of Southern hairy crayfish (Euastacus hirsutus), recorded as EndangeredEN

Southern hairy crayfish

Euastacus hirsutus
Photograph of Vaquita (Phocoena sinus), recorded as Critically EndangeredCR

Vaquita

Phocoena sinus

Quick answers

What is Ellen Clark's crayfish?
Ellen Clark's crayfish was named by Morgan "in respect of Ellen Clark’s pioneering parastacid studies".
What is the conservation status of Ellen Clark's crayfish?
Endangered, as the IUCN category stored on Wikidata for Euastacus clarkae. Confirm the official assessment on iucnredlist.org.
Where does Ellen Clark's crayfish live?
The species is assessed as "Endangered" based on an extent of occurrence (EOO) of 198 square kilometres (76 sq mi), an area of occupancy (AOO) of 68 square kilometres (26 sq mi) occurrence at one to two threat-based locations and a speculated decline in area, extent and quality of habitat due to climate change.
Why is Ellen Clark's crayfish in crisis?
The species is assessed as "Endangered" based on an extent of occurrence (EOO) of 198 square kilometres (76 sq mi), an area of occupancy (AOO) of 68 square kilometres (26 sq mi) occurrence at one to two threat-based locations and a speculated decline in area, extent and quality of habitat due to climate change.
Is this the IUCN Red List page for Euastacus clarkae?
No. This is a researched catalog account. The Red List is the assessment.
Is Ellen Clark's crayfish a pet?
An animal on this catalog is in crisis in the wild. Keeping one is usually the wrong question.