A New Noncalcified Thallophytic Alga from the Lower Silurian of Anticosti Island, Eastern Canada
A New Noncalcified Thallophytic Alga from the Lower Silurian of Anticosti Island, Eastern Canada
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DOI：
10.1086/674451
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发表时间：
2014-03
影响因子：
2.3
通讯作者：
Wang Yi;Jin Jisuo;Zhan Renbin
中科院分区：
文献类型：
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作者：
Wang Yi;Jin Jisuo;Zhan Renbin
一个异常保存的非钙化的叶状植物体，Menieria minuta gen. nov. et sp. nov.，产于加拿大东部安提科斯蒂岛的枪河组（中Aeronian，下志留统）的最上部，其特征是一个相对脆弱的叶状体，具有一个中轴，侧枝和螺旋排列，规则和紧密间隔的细长舌状附属物。藻类在当地构成了一个以腕足动物为主的古群落的生物量的重要组成部分，形成了一个相对深水的透光带内的潮下带设置的藻类草甸。这种罕见的藻类化窗口表明，这种软藻草甸可能在早古生代很常见，类似于现代的海草草甸，是碳汇的一部分。
An exceptionally preserved noncalcified thallophytic alga, Menieria minuta gen. nov. et sp. nov. from the uppermost Gun River Formation (middle Aeronian, Lower Silurian) of Anticosti Island, eastern Canada, is characterized by a relatively delicate thallus with a central axis, lateral branches, and helically arranged, regularly and closely spaced, elongate-linguoid appendages. The algae locally constitute an important portion of the biomass in a brachiopod-dominated paleocommunity, forming an algal meadow on a relatively deepwater subtidal setting within the photic zone. This rare fossilization window suggests that such soft algal meadows may have been common during the Early Paleozoic, resembling modern sea grass meadows that are part of the carbon sink.