Placoneis Mereschkowsky (Bacillariophyta) revisited: resolution of several typification and nomenclatural problems, including the generitype
Placoneis Mereschkowsky (Bacillariophyta) revisited: resolution of several typification and nomenclatural problems, including the generitype
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DOI：
10.1046/j.1095-8339.2003.00115.x
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发表时间：
2003
影响因子：
2.4
通讯作者：
E. Cox
中科院分区：
文献类型：
--
作者：
E. Cox
研究人员对最初由 Ehrenberg 描述、现在归入 Placoneis 属的三种舟状硅藻进行了鉴定。来自柏林 Ehrenberg 收藏品和伦敦自然历史博物馆的硅藻收藏品的模式标本和材料均使用 LM 和 SEM 进行了检查（如果可能）。自从埃伦伯格给它们命名以来，每个物种的概念都发生了变化。目前对腹鳍藻和舟形藻精液的认识可以追溯到唐金，而胎盘藻的认识则可以追溯到格鲁诺。 N. 精液的 LM 和 SEM 研究支持其向 Placoneis 的转移。建议将特定的称谓胃和胎盘与保守类型一起保留，以维持既定的做法，并将名称 P. navularis 应用于 N. semen sensu Donkin。从自然历史博物馆的幻灯片中重新检查了 Placoneis elginensis 和 Placoneis anglica 的模式材料，得出的结论是 P. elginensis 被错误地应用于第二个物种的标本，该名称 P. anglica 是合适的。对这些物种、P. pseudanglica 和先前包含在 P. elginensis 中的其他物种的界定进行了回顾。对 Navicula abiskoensis 和 Navicula amphibola 的 LM 和 SEM 观察结果支持它们向 Placoneis 的转移。为属于 Placoneis 的其他类群创建了六种新组合：P. constans、P. insignita、P. interglacialis、P. porifera、P. rostrata 和 P. subgastriformis。回顾了 Placoneis 属的系统地位。其中包括修订后的通用描述和当前分配给 Placoneis 的物种的摘要。 © 2003 伦敦林奈学会，林奈学会植物学杂志，2003, 141, 53–83。
The identity of three naviculoid diatoms originally described by Ehrenberg and now placed in the genus Placoneis was investigated. Type specimens and material from both the Ehrenberg Collection (Berlin) and the diatom collection at the Natural History Museum, London, were examined with LM and also SEM where possible. The concept of each species had changed since Ehrenberg named them. The current understanding of Placoneis gastrum and Navicula semen can be traced back to Donkin, and that of Placoneis placentula to Grunow. LM and SEM studies of N. semen support its transfer to Placoneis. It is proposed that the specific epithets gastrum and placentula should be conserved with conserved types to maintain established practice, and the name P. navicularis applied to N. semen sensu Donkin. Type material of Placoneis elginensis and Placoneis anglica was re-examined from slides in the Natural History Museum and it was concluded that P. elginensis has been incorrectly applied to specimens of a second species, for which the name P. anglica was appropriate. The delimitation of these species, P. pseudanglica, and others previously included in P. elginensis is reviewed. LM and SEM observations of Navicula abiskoensis and Navicula amphibola support their transfer to Placoneis. Six new combinations are made for additional taxa belonging to Placoneis: P. constans, P. insignita, P. interglacialis, P. porifera, P. rostrata and P. subgastriformis. The systematic position of the genus Placoneis is reviewed. A revised generic description and a summary of the species currently assigned to Placoneis are included. © 2003 The Linnean Society of London, Botanical Journal of the Linnean Society, 2003, 141, 53–83.