海座星（edrioasteroids），又称座海星，是一类已灭绝的棘皮动物，生存于寒武纪中期至二叠纪。海座星营固着滤食生活，无茎（Column），身体扁平，球形或圆柱形，从背部中央的口辐射出的五条步带沟是海座星的典型特征，步带沟里长有特殊的管足，用来输送食物到口中。
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海座星在棘皮动物门中的具体分类地位尚无共识，有文献将海座星纲归入海胆亚门[1][2][3][4]，也有资料将其归入海百合亚门[5]，还有假说认为海座星纲是棘皮动物较早分化的干群，不属于任何亚门。[6][7][8]
属及种
仅列出部分属。
- ?Arkarua
- Walcottidiscus（最古老的海座星，来自于中寒武纪的伯吉斯页岩）
- W. typicalus
- Stromatocystites
- S. pentangularis
- S. reduncus
- S. walcotti
- Kailidiscus
- K. chinensis
- 海座星属 Edrioaster（模式属）
- E. bigsbyi
- E. priscus
- Edriophus
- E. levis
- Paredriophus
- P. elongatus
- Totiglobus
- T. nimius
- T. lloydi
- Cambraster
- C. cannati
- C. tastudorum
- Edriodiscus
- E. primotica
- Lebedodiscus
- 费氏海座星属 Foerstediscus
- F. grandi
- F. splendens
- Cystaster
- C. stellatus
- Cryptogoleus
- C. chapmani
- Bellochthus
- Streptaster
- S. vorticellatus
- Cryptogoleus
- C. chapmani
- Carneyella
- C. pilea
- C. faberi
- C. ulrichi
- Isorophus
- I. cincinnatiensis
- Isorophusella
- 海蒲团属 Camptostroma
- C. roddyi
- Rectitriordo
- Agelacrinites
- Krama
- K. devonicum (Bassler), 1936
- Parakrama
- Hemicystites
- H. bohemica
- H. chapmani
- H. devonicus
- Neoisorophusella
- N. lanei
- N. berryi
- N. maslennikovi
- N. whitesidei
- Curvitriordo
- Thresherodiscus
- T. ramosa (Foerste, 1914)
- Postibulla
- P. westergaardi
- Parapostibulla
- P. belli
- P. graysoni
- Eopostibulla
- Pyrgopostibulla
- Yorkicystis
- Torquerisediscus
- Cooperidiscus
- Dynocystis
- Stalticodiscus
- Ulrichidiscus
- Clavidiscus
- Discocystis
- Hypsiclavus
- Spiraclavus
- Giganticlavus
- Lispidecodus
- L. plinthotus (Kesling, 1967)
参考文献
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