擬海百合(學名:Paracrinoidea),又稱擬海百合,是一類已滅絕的棘皮動物,生存於奧陶紀早期至志留紀早期。萼板(Thecal plate)排列略作兩側對稱,有2到4個似海百合的腕(Arm),具有側羽枝。種類不多,目前已知約有13~15屬。
分類
- †目 Comarocystitida
- ?†科 Heckeritidae
- †Heckerites
- †科 Amygdalocystitidae
- †Achradocystites Volborth, 1870
- †Amygdalocystites Billings, 1854 (= Ottawacystis) (?= Billingsocystis)
- †Oklahomacystis Parsley & Mintz, 1975 (Bassler, 1943)
- †Ovulocystites Frest et al., 1980
- †科 Comarocystitidae Balther, 1899
- †Comarocystites Billings, 1854
- †Implicaticystis
- †Sinclairocystis
- ?†科 Heckeritidae
- †目 Platycystitida
- †科 Platycystitidae
- †亞科 Canadocystinae Frest, Strimple, & Coney, 1979
- †Canadocystis (=Sigmacystis)
- †亞科 Platycystitinae Frest, Strimple, & Coney, 1979
- †Globulocystites Frest, Strimple, & Coney, 1979
- †Globulocystites rotundatus Frest, Strimple, & Coney, 1979(模式種)
- †Globulocystites cristatus (Bassler)(Frest, Strimple, & Coney, 1979將本種歸入Globulocystites)
- †Globulocystites infundus Frest, Strimple, & McGinnis, 1977, p. 215(Frest, Strimple, & Coney, 1979將本種由Platycystites移至Globulocystites)
- †Platycystites Miller, 1889
- †Platycystites faberi Miller, 1889(模式種)
- †Platycystites ovalis Frest, Strimple, & Coney, 1979
- †Platycystites sp. Frest, Strimple, & Coney, 1979
- †Globulocystites Frest, Strimple, & Coney, 1979
- †亞科 Canadocystinae Frest, Strimple, & Coney, 1979
- †科 Malocystitidae
- †Malocystites
- †Wellerocystis
- †科 Bistomiacystitidae
- †Bistomiacystis
- †科 Platycystitidae
- 目未定
可能為擬海百合類:[來源請求]
- †Allocystites(Sprinkle, 1973認為本屬是與Canadacystis相關的擬海百合類,但Parsley & Mintz, 1975則否)
- †Paleocystites
- †Ulrichocystis
參考文獻
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