小蛸枕（學名：Micraster）是一屬已滅絕的海膽，其化石分佈在非洲、南極洲、歐洲及北美洲，牠們是白堊紀海膽最高級形式的一種。這種心海膽的後部是尖的，並有突出的前部凹口。五條花瓣狀步帶狹窄且很短。牠們生活在海底的軟泥中，利用前部凹口將泥流送入嘴中以攝取食物。[1][2]
物種
根據Echinologia[3]：
- Micraster aturicus Hébert in Seunes, 1891
- Micraster brevis Desor dans Agassiz & Desor, 1847
- Micraster coranguinum (Leske, 1778)
- Micraster corbaricusLambert, 1895
- Micraster cortestudinarium (Goldfuss, 1826)
- Micraster decipiens (Bayle, 1878)
- Micraster douvillei Lambert, 1920
- Micraster glyphus Schlüter, 1869
- Micraster gourdoni Cotteau, 1869
- Micraster larteti Munier Chalmas, 1895
- Micraster leskei Desmoulins, 1837
- Micraster mengaudi (Lambert, 1920)
- Micraster turonensis (Bayle, 1878)
根據世界海洋物種目錄（2014年5月2日）：
- Micraster norfolkensis Smith & Wright, 2012
- Micraster burgiensis Lambert, 1935f
- Micraster coravium Moskvin & Poslavskaya, 1959
- Micraster depressus Kongiel, in Kongiel & Matweijewówna, 1937
- Micraster desori Odum, 1926
- Micraster elevatus Sánchez Roig, 1949
- Micraster gappi Kühn, 1925
- Micraster leskei d'Orbigny, 1855
- Micraster piriformis Böhm, 1927
- Micraster subglobosus Moskvin & Poslavskaya, 1959
- Micraster trangahyensis Lambert, 1936c
- Micraster uddeni Cooke, 1953
- Micraster vistulensis Kongiel, 1950
圖片
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參考文獻
外部連結
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