Echinodermata (Echinoderms)
Class: Asteroidea
Order: Forcipulatida
Family: Heliasteridae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Heliaster solaris | Clark, 1920 | 24-rayed sunstar | 1983 | Galápagos Islands, Ecuador | Extinct or invalid (synonym) | Access |
Order: Paxillosida
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Dipsacaster sagaminus | Hayashi, 1973 | (rediscovered) | Japan | Rediscovered | Access |
Order: Valvatida
Family: Oreasteridae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Halityle regularis | Fisher, 1913 | - | - | Africa, Australia, Madagascar & Philippines | Rediscovered | Access |
Family: Poraniidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Patiriella littoralis | Dartnall, 1970 | Derwent River seastar | 2004 | Tasmania, Australia | Extinct | Access |
Class: Echinoidea
Order: Camarodonta
Family: Temnopleuridae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Amblypneustes elevatus | (Hutton, 1872) | (rediscovered) | Australia & New Zealand | Rediscovered | Access |
Order: Cassiduloida
Family: Cassidulidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Cassidulus infidus | Mortensen 1948 | (rediscovered) | Bahia, Brazil | Rediscovered | Access |
Order: Clypeasteroida
Family: Clypeasteridae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Hesperaster crassus | H. L. Clark, 1938 | - | Mid-Holocene | Western Australia, Australia | Extinct | Access |
Order: Spatangoida
Family: Brissidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Taimanawa mortenseni | Henderson & Fell, 1969 | - | - | Indo-Pacific Ocean? | Rediscovered | Access |
Family: Loveniidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Breynia vredenburgi | Anderson, 1907 | - | - | Andaman Islands, India | Rediscovered | Access |
Class: Holothuroidea
Order: Dendrochirotida
Family: Ypsilothuriidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Ypsilocucumis californiae | Massin & Hendrickx, 2011 | (rediscovered) | western Mexico (including the Gulf of California) | Rediscovered | Access |
Order: Elasipodida
Family: Elpidiidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
|
Peniagone leander
|
Pawson & Foell, 1986 | - | Pacific Ocean (incl. Mariana Trench area) | Rediscovered | Access | |
| Penilpidia ludwigi | (von Marenzeller, 1893) | Ludwig's sea cucumber | - | Mediterranean Sea | Rediscovered | Access |
Order: Molpadiida
Family: Caudinidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Hedingia mediterranea | (Bartolini Baldelli, 1914) | (rediscovered) | Mediterranean | Rediscovered | Access |