Elpidia
# Elpidia

Elpidia is a genus of deep-sea sea cucumbers. Members are characterised by their rod-shaped spicules which each have two pairs of obliquely placed horizontal arms and two vertical apophyses. There is a high degree of endemism in this genus with different species occupying different deep sea basins or regions.

## Species

The following species are recognised in the genus Elpidia:

* Elpidia adenensis Belyaev, 1971
* Elpidia antarctica Belyaev, 1971
* Elpidia atakama Belyaev, 1971
* Elpidia belyaevi Rogacheva, 2007
* Elpidia birsteini Belyaev, 1971
* Elpidia chilensis Belyaev, 1971
* Elpidia decapoda Belyaev, 1975
* Elpidia echinata (R. Perrier, 1896)
* Elpidia glacialis Théel, 1876
* Elpidia gracilis Belyaev, 1975
* Elpidia heckeri Baranova, 1989
* Elpidia javanica Belyaev, 1971
* Elpidia kermadecensis Hansen, 1956
* Elpidia kurilensis Baranova & Belyaev in Belyaev, 1971
* Elpidia lata Belyaev, 1975
* Elpidia longicirrata Belyaev, 1971
* Elpidia minutissima Belyaev, 1971
* Elpidia ninae Belyaev, 1975
* Elpidia solomonensis Hansen, 1956
* Elpidia soyoae Ogawa, Morita & Fujita, 2020
* Elpidia sundensis Hansen, 1956
* Elpidia theeli Hansen, 1956
* Elpidia uschakovi Belyaev, 1971
