Morpho-molecular description of the new sand-dwelling dinoflagellate genus Aliferia gen. nov. (Dinophyceae) from the Sea of Japan, including two new species

IF 1.5 4区 生物学 Q3 MARINE & FRESHWATER BIOLOGY Phycologia Pub Date : 2023-07-04 DOI:10.1080/00318884.2023.2233838
M. Selina, K. Efimova, Tatiana V. Morozova, M. Hoppenrath
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Abstract

ABSTRACT Two new marine sand-dwelling dinoflagellate species from subtidal sand collected in Peter the Great Bay, Sea of Japan, were described by morphological and molecular methods. Both species were slightly flattened dorsoventrally or laterally, roughly oval in shape, with small epitheca and large hypotheca, with ascending cingulum, and sulcus covered by a wide list of the first postcingular plate. The species differed in the thecal ornamentation, the number of epithecal plates, the shape of the left sulcal list and the shape of the fifth postcingular plate. Phylogenetic reconstructions based on LSU rDNA sequences of the two new species and their morphological characters confirmed their monophyly and justified the establishment of a new genus, Aliferia gen. nov., with Al. nikselinii sp. nov. and Al. kharlamenkoi sp. nov. The new genus was characterized by dorsoventrally or laterally flattened cells with small epitheca and large hypotheca, ascending cingulum, shifted or not shifted sulcus covered by a wide list on the left side, and with one or two ventral spines. Thecal tabulation: APC 3′ 2a 6–7′′ 2? or 3c 5s 5′′′ 1′′′′. Distance-based analyses indicated Diplopsalidoideae as the closest phylogroup to Aliferia. Seven phylogroups of the Amphidiniopsis complex, Herdmania, the Protoperidinium complex, and Archaeperidinium (Clade ‘Y’) were grouped with the highest support values, and Aliferia formed an independent branch basal to members of Clade ‘Y’. The genus Aliferia showed morphological similarity to both sand-dwelling (Amphidiniopsis and Herdmania) and planktonic (Diplopsalidoideae) species. The morphology and phylogeny of Aliferia suggested complex taxonomic relationships between the planktonic and benthic genera.
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日本海沙栖甲藻新属Aliferia gen.nov.(甲藻科)的形态分子描述,包括两个新种
摘要利用形态学和分子生物学方法,从日本海彼得大帝湾潮下沙中发现了两种新的生活在沙中的甲藻。这两个物种的背内侧或外侧都稍微扁平,大致呈椭圆形,有小上皮和大抵押,有上升的扣带,沟被大量的第一个语后板覆盖。该物种在鞘的装饰、上皮板的数量、左沟表的形状和第五个语后板的形状上有所不同。基于这两个新种的LSU rDNA序列及其形态特征的系统发育重建证实了它们的单系性,并证明了与Al.nikselinii sp.nov.和Al.kharlamenkoi sp.nov建立新属Aliferia gen.nov.的合理性,上升的扣带,移位或不移位的沟被左侧的宽列表覆盖,并且具有一个或两个腹面棘。图表:APC 3′2a 6–7′′2?或3c 5s 5′′′′1′′′。基于距离的分析表明Diplopsalidoideae是最接近Aliferia的门群。Amphitiniopsis复合体、Herdmania、Protoperidinium复合体和Archaeperidinium(分支'Y')的七个门组以最高的支持值分组,Aliferia形成了一个独立的分支,以分支'Y''的成员为基础。Aliferia属在形态上与沙栖物种(Amphitinopsis和Herdmania)和浮游物种(Diplopsalidoideae)相似。Aliferia的形态和系统发育表明浮游属和底栖属之间存在复杂的分类学关系。
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来源期刊
Phycologia
Phycologia 生物-海洋与淡水生物学
CiteScore
3.10
自引率
18.80%
发文量
54
审稿时长
3 months
期刊介绍: Phycologia is published bimonthly by the International Phycological Society and serves as a publishing medium for information about any aspect of phycology. Membership in the Society is not necessary for publication. Submitted manuscripts cannot be previously published or submitted elsewhere. Copyright ownership of all accepted papers is held by the International Phycological Society.
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