A molecular assessment of species diversity and generic boundaries in the red algal tribes Polysiphonieae and Streblocladieae (Rhodomelaceae, Rhodophyta) in Canada
A molecular assessment of species diversity and generic boundaries in the red algal tribes Polysiphonieae and Streblocladieae (Rhodomelaceae, Rhodophyta) in Canada
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加拿大红藻族 Polysiphonieae 和 Streblocladieae（Rhodomelaceae、Rhodophyta）物种多样性和属界的分子评估
DOI：
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发表时间：
2018
影响因子：
2.4
通讯作者：
G. Saunders
中科院分区：
文献类型：
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作者：
Amanda M. Savoie;G. Saunders
摘要：在加拿大条形码调查（COI-5 P）中产生的Polysiphonieae和Streblocladieae部落的序列数据，一个大型的和分类学上具有挑战性的红藻群，揭示了显着的分类混乱和隐藏的物种多样性。太平洋多管藻Hollenberg、圆锥多管藻Montagne、严格多管藻（迪尔温）Greville和岩藻脊椎藻（哈德逊）Kuntze都是两个或多个遗传上不同但被忽视的物种的复合体。其中一个变种P. pacifica被提升为物种P. determinata（Hollenberg）Savoie & Saunders，stat。11月11日，在加拿大新记录了几个新的植物群，包括P. kapraunii Stuercke & Freshwater和P. morrowii Harvey。随后的多基因（COI-5 P，LSU和rbcL）系统发育分析证实，多管藻属Greville是多系的，目前分配的物种解决了许多其他属。狭义多管藻（Polysiphonia sensu stricto）是一组与模式多管藻（Polysiphonia stricta）形成单系谱系的物种。Carradoriella P.C.Silva是根据南非物种Carradoriella virgata（C.Agardh）P.C. Silva复活的。以前属于多管藻属的物种被转移到卡拉多里藻属、细管藻属和脊椎动物属，以及这里描述的三个新属：棘管藻属。nov.，基于A. echinata（Harvey）comb. nov.; Eurobissiphonia gen. nov.为E. confusa（Hollenberg）comb. nov.和E. sabulosia（B.Kim & M.S.Kim）comb. nov.;和Kapraunia gen. nov.，其中包括K。schneideri（Stuercke & Freshwater）comb. nov.和另外三种。
ABSTRACT Sequence data generated during a Canadian barcode survey (COI-5P) of the tribes Polysiphonieae and Streblocladieae, a large and taxonomically challenging group of red algae, revealed significant taxonomic confusion and hidden species diversity. Polysiphonia pacifica Hollenberg, P. paniculata Montagne, P. stricta (Dillwyn) Greville and Vertebrata fucoides (Hudson) Kuntze were all complexes of two or more genetically distinct yet overlooked species. One variety of P. pacifica was elevated to the rank of species as P. determinata (Hollenberg) Savoie & Saunders, stat. nov. Several new additions to the Canadian flora were recorded including P. kapraunii Stuercke & Freshwater and P. morrowii Harvey. Subsequent multi-gene (COI-5P, LSU and rbcL) phylogenetic analyses confirmed that the genus Polysiphonia Greville was polyphyletic, and currently assigned species resolved with many other genera. Polysiphonia sensu stricto was restricted to a group of species that formed a monophyletic lineage with the type, Polysiphonia stricta. Carradoriella P.C.Silva was resurrected based on the South African species Carradoriella virgata (C.Agardh) P.C.Silva. Species previously attributed to Polysiphonia were transferred to Carradoriella, Leptosiphonia and Vertebrata as well as to three new genera described here: Acanthosiphonia gen. nov., based on A. echinata (Harvey) comb. nov.; Eutrichosiphonia gen. nov. for E. confusa (Hollenberg) comb. nov. and E. sabulosia (B.Kim & M.S.Kim) comb. nov.; and Kapraunia gen. nov., which includes K. schneideri (Stuercke & Freshwater) comb. nov. and three additional species.