Abarca Nelida, Jahn Regine, Zimmermann Jonas, Enke Neela
Botanischer Garten und Botanisches Museum Berlin-Dahlem, Freie Universität Berlin, Berlin, Germany.
Botanischer Garten und Botanisches Museum Berlin-Dahlem, Freie Universität Berlin, Berlin, Germany ; AG Spezielle Botanik, Justus-Liebig-Universität, Giessen, Germany.
PLoS One. 2014 Jan 29;9(1):e86885. doi: 10.1371/journal.pone.0086885. eCollection 2014.
Diatom cultures of the G. parvulum species complex were established from seven different sites in the Faroe Islands, Sweden, Germany, Mexico and Korea, and were studied in detail. Eight morphodemes were identified which corresponded to the descriptions of the cosmopolitan taxon G. parvulum (Kützing) Kützing sensu lato: its nominate variety (var. parvulum), G. parvulum var. exilissimum Grunow and G. parvulum f. saprophilum Lange-Bertalot & Reichardt, G. [parvulum var.] lagenula Kützing plus four unidentifiable morphodemes. The concatenated analysis of the sequences of the markers 18SV4, rbcL, and ITS as well as morphological data resulted in a separation of four taxa based on their biogeography in Mexico, Korea, central Continental Europe and Northern Atlantic Europe. Mantel tests showed a significant correlation between molecular and geographical distances. The diagnoses of two taxa, G. parvulum sensu stricto, and G. lagenula, were emended, G. saprophilum elevated to species rank and epitypes designated. One species was newly described.
从法罗群岛、瑞典、德国、墨西哥和韩国的七个不同地点建立了细小舟形藻物种复合体的硅藻培养物，并进行了详细研究。鉴定出八个形态型，它们与世界性分类单元狭义细小舟形藻（Kützing）Kützing的描述相对应：其指名变种（var. parvulum）、细小舟形藻纤细变种（G. parvulum var. exilissimum Grunow）和细小舟形藻腐生变型（G. parvulum f. saprophilum Lange-Bertalot & Reichardt）、[细小舟形藻变种] 具颈舟形藻（G. [parvulum var.] lagenula Kützing）以及另外四个无法鉴定的形态型。对18SV4、rbcL和ITS标记序列以及形态学数据的串联分析，根据它们在墨西哥、韩国、中欧大陆和北大西洋欧洲的生物地理学，将四个分类单元区分开来。曼特尔检验表明分子距离与地理距离之间存在显著相关性。对两个分类单元，狭义细小舟形藻和具颈舟形藻的诊断进行了修订，腐生舟形藻提升为物种等级并指定了后选模式。新描述了一个物种。
