Tethyaster

{{Short description|Genus of starfishes}}

{{Automatic taxobox

|image = Tethyaster grandis.jpg

|image_caption = Tethyaster grandis

|taxon = Tethyaster

|authority = Sladen, 1889

}}

Tethyaster is a genus of echinoderms belonging to the family Astropectinidae.{{cite web |title=Tethyaster Sladen, 1889 |url=https://www.gbif.org/species/2270094 |website=www.gbif.org |access-date=2 October 2021 |language=en}}

The genus has almost cosmopolitan distribution.

Species:

• Tethyaster albertensis {{small|Hall & Moore, 1990}}
• Tethyaster antares {{small|Fernández, Perez, Luci & Carrizo, 2014}}
• Tethyaster aulophora {{small|(Fisher, 1911)}}
• Tethyaster canaliculatus {{small|(A.H.Clark, 1916)}}
• Tethyaster grandis {{small|(Verrill, 1899)}}
• Tethyaster guerangeri {{small|Breton, 1992}}
• Tethyaster jurassicus {{small|Blake, 1986}}
• Tethyaster pacei {{small|(Mortensen, 1925)}}
• Tethyaster subinermis {{small|(Philippi, 1837)}}
• Tethyaster tangaroae {{small|Rowe, 1989}}
• Tethyaster vestitus {{small|(Say, 1825)}}