J. Botting, D. Janussen, L. Muir, M. Dohrmann, Junye Ma, Yuandong Zhang
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引用次数: 2
Abstract
The deep‐sea hexactinellid sponge Euplectella is an iconic living genus with no known fossil record. The family Euplectellidae (which includes a subset of genera that share the common name ‘Venus' flower basket’) has a very sparse record from the Middle Cretaceous onwards, and an estimated crown‐group origin at around 300 Ma based on molecular clocks. New material of Venus' flower baskets from the latest Ordovician Anji Biota of China (444 Ma) dramatically extends the known and predicted range of the group, with implications for the diversification of the class Hexactinellida and the timing of development of deep‐sea ecosystems. The new material is described as Anjiplectella davidipharus gen. et sp. nov., with an additional taxon remaining in open nomenclature but demonstrating diversification within the group by this time.
深海海鞘海绵尤普莱克是一种没有已知化石记录的标志性生物。Euplectellidae科(包括一个属的子集，它们共享一个共同的名字“维纳斯花篮”)从白垩纪中期开始就有非常稀疏的记录，根据分子钟估计，冠群的起源大约在300 Ma左右。来自中国最新的奥陶纪安吉生物群(444 Ma)的维纳斯花篮的新材料极大地扩展了该群的已知和预测范围，对Hexactinellida类的多样化和深海生态系统的发展时间具有重要意义。新材料被描述为Anjiplectella davidipharus gen. et sp. nov.，另有一个分类单元保留在开放的命名法中，但此时在该群体中显示出多样化。
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