Allogromia Arnoldi n. sp.: Distribution, Phylogenetic Placement, Culture Methods, and Fine Structure of a New Monothalamid Foraminiferan

IF 0.9 4区 地球科学 Q4 PALEONTOLOGY
S. Goldstein, D. Ballero, E. Richardson, S. Bowser
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引用次数: 1

Abstract

Allogromiids, organic-walled foraminifera, are common members of foraminiferal associations in reef and back-reef settings of the Florida Keys and other locales, and many live in cryptic or otherwise protected microhabitats associated with macroalgae and seagrasses. A new species of Allogromia was isolated from the alga Dasycladus vermicularis (Scopoli) collected from prop-roots of the red mangrove, Rhizophora mangle (Linneaus), in Zane Grey Creek, Long Key, Florida. This species, Allogromia arnoldi n. sp., genetically matches sequences of undescribed and uncharacterized allogromiids deposited in GenBank from Cyprus and Jamaica. Allogromia arnoldi is genetically and morphologically distinct from A. laticollaris Arnold, A. laticollaris strain CSH, A. sp. NF (Lee & Pierce, 1963), environmental DNA sequences of morphologically unknown allogromiids, a number of freshwater forms, and several undescribed marine allogromiids known in the literature by nicknames (e.g., “squatter,” “rubble dome,” “twinkle”). This new species of Allogromia belongs to Clade M of the monothalamid foraminifera. Allogromia arnoldi appears to be broadly distributed, and it is fairly easy to isolate and rear in culture. Individuals typically have bright orange cytoplasm, a variable number of apertures, and can assume a wide range of shapes. Transmission electron microscopy (TEM) following high-pressure freezing and freeze substitution shows that the test has a complex fine structure that varies in thickness. It consists of two layers: a thick inner layer with a “herringbone” fine structure, and a thinner, outer electron-opaque mesh-like layer that occurs in patches. The number of nuclei varies per individual, and the non-reproductive nucleus is morphologically similar to that of many other monothalamid foraminifera.
Allogromia Arnoldi n. sp:一种新的单thalamid有孔虫的分布、系统发育定位、培养方法和精细结构
异孔虫,即有机壁有孔虫,是佛罗里达群岛和其他地区暗礁和暗礁环境中有孔虫协会的常见成员,许多生活在与大型藻类和海草相关的隐蔽或其他受保护的微栖息地。从从佛罗里达州Long Key的Zane Grey Creek的红树主根Rhizophora mangle(Linneaus)中采集的蛭石(Scopoli)中分离到一个新的异Gromia物种。该物种名为Allogromia arnoldi n.sp.,在基因上与塞浦路斯和牙买加GenBank中保存的未描述和未表征的同种异体的序列相匹配。arnoldi异卵菌在基因和形态上与A.laticoleris Arnold、A.laticorris菌株CSH、A.sp.NF(Lee&Pierce,1963)、形态未知的异卵菌的环境DNA序列、许多淡水形式以及文献中已知的几种未描述的海洋异卵菌昵称(例如,“擅自占用者”、“碎石圆顶”、“闪烁”)不同。这一新种异孔虫属于单丘脑有孔虫目M分支。arnoldi异卵菌似乎分布广泛,在文化中很容易分离和繁殖。个体通常具有明亮的橙色细胞质,孔径数量可变,并且可以呈现各种形状。高压冷冻和冷冻置换后的透射电子显微镜(TEM)显示,该测试具有厚度变化的复杂精细结构。它由两层组成:一层是具有“人字形”精细结构的厚内层,另一层是以斑块形式出现的较薄、外部电子不透明的网状层。每个个体的细胞核数量各不相同,非生殖细胞核在形态上与许多其他单丘脑有孔虫相似。
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来源期刊
Journal of Foraminiferal Research
Journal of Foraminiferal Research 地学-古生物学
CiteScore
2.10
自引率
9.10%
发文量
32
审稿时长
>12 weeks
期刊介绍: JFR publishes original papers of international interest dealing with the Foraminifera and allied groups of organisms. Review articles are encouraged.
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