Adhaerentella dendrocorona gen. and sp. nov: An Attached Monothalamid Foraminifera From the Abyssal Pacific

IF 2.6 4区 生物学 Q3 MICROBIOLOGY
Ashley Burkett, Joshua Anadu, Maria Holzmann, Jan Pawlowski, Robert Brandon Pratt, Anthony Rathburn
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引用次数: 0

Abstract

A new genus and species of a monothalamid foraminifera, Adhaerentella dendrocorona, has been identified through phylogenetic and morphological assessment from the Pacific Ocean abyssal plain at Station M, off California. After at least 1 year of colonization time on the seafloor at 4000 m, 141 specimens belonging to the new species were observed attached to plastic substrate deposited on the bottom as a part of the Seafloor Epibenthic Attachment Cube (SEA3) experiments. Adhaerentella dendrocorona is characterized by agglutinated hemispherical tests connected with dendritic tubes. The delicate phyllosilicate branches collapse when not immersed, but embedding in agar or resin facilitates imaging. MicroCT images reveal compositional differences between the agglutinated base and branching tube structures, consisting of phyllosilicates. Despite sharing some morphological similarities with other attached agglutinated genera, such as Capsammina, Crithionina, and Hemisphaerammina, Adhaerentella dendrocorona is genetically different from the latter genera and branches in the monothalamid Clade M. Adhaerentella dendrocorona has a close relationship with undescribed monothalamids from Antarctica, suggesting the possible global distribution of the genus. This study indicates that monothalamid foraminifera are important components of attached abyssal meiofauna, which have evolved morphologies that are likely adapted for suspension feeding in oligotrophic environments that feature hard substrates.

Abstract Image

来自深海太平洋的一种附着的单壳有孔虫
通过系统发育和形态学鉴定,在加利福尼亚M站太平洋深海平原发现了一种单壳虫有孔虫Adhaerentella dendrocorona新属和新种。在4000米海底至少1年的定植时间后,作为海底底栖生物附着立方体(SEA3)实验的一部分,141个属于新物种的标本被观察到附着在海底沉积的塑料基质上。树突冠粘附菌的特征是与树突管相连的凝集半球形试验体。脆弱的叶状硅酸盐分支在不浸入时塌陷,但在琼脂或树脂中嵌入有利于成像。显微ct图像显示了凝集碱和分支管结构的组成差异,由层状硅酸盐组成。尽管Adhaerentella dendrocorona与其他附着的凝集属(Capsammina、Crithionina和Hemisphaerammina)在形态上有一些相似之处,但在遗传上与后者及其分支不同。Adhaerentella dendrocorona与来自南极洲的未描述的单thalamids有密切的关系,这表明该属可能在全球分布。该研究表明,单丘脑有孔虫是附着的深海减数动物的重要组成部分,它们已经进化出可能适应在以硬基质为特征的少营养环境中悬浮进食的形态。
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来源期刊
CiteScore
4.30
自引率
4.50%
发文量
85
审稿时长
6-12 weeks
期刊介绍: The Journal of Eukaryotic Microbiology publishes original research on protists, including lower algae and fungi. Articles are published covering all aspects of these organisms, including their behavior, biochemistry, cell biology, chemotherapy, development, ecology, evolution, genetics, molecular biology, morphogenetics, parasitology, systematics, and ultrastructure.
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