Valvaeodinium hymenosynypha (Morbey) comb. nov., a dinoflagellate cyst from the uppermost Triassic and lowermost Jurassic (Rhaetian and Hettangian) of Europe

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2023-09-05 DOI:10.1080/01916122.2023.2252482

Sofie Lindström

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引用次数: 1

Abstract

Abstract Cymatiosphaera hymenosynypha Morbey 1975, previously recorded from the Rhaetian Westbury Formation in the United Kingdom, occurs in Triassic–Jurassic boundary strata from Denmark. From the present study it is clear that this small, finely reticulate, ellipsoidal, two-layered palynomorph is not a prasinophyte, but a dinoflagellate cyst with a combination apical/intercalary archaeopyle (type tAtI) which involves three apical plates plus one intercalary plate. This cavate cyst is morphologically similar but not identical to Valvaeodinium hanneae Piasecki 2001 from the uppermost Bathonian to lower Callovian of East Greenland, and it is therefore here transferred to Valvaeodinium, as Valvaeodinium hymenosynypha (Morbey) Lindström comb. nov. The appearance of Valvaeodinium hymenosynypha in Rhaetian strata in the Danish Basin suggests that the lineage of cavate Valvaeodinium cysts originated in the Late Triassic alongside a chorate species of the genus. Valvaeodinium hymenosynypha seems to have survived just barely past the end-Triassic mass extinction as it is also present in the earliest Hettangian.

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处女膜厚叶蜡藻（Morbey）梳。nov.，一个来自欧洲最上三叠纪和最下侏罗纪（雷提阶和荷塘阶）的甲藻囊肿

摘要hymenosynypha Morbey Cymatisphaera 1975，先前记录于英国Rhaetian Westbury组，产于丹麦三叠纪-侏罗纪边界地层。从目前的研究中可以清楚地看出，这种小的、细网状的、椭圆形的、两层的孢子虫形态不是一种前生植物，而是一种甲藻囊肿，其具有一个顶端/翼间古塔组合（tAtI型），包括三个顶端板加一个翼间板。该空腔囊肿在形态上与Valvaeodinium hanneae Piasecki 2001相似，但不完全相同，从东格陵兰最上层的巴通阶到下卡洛维阶，因此在这里被转移到Valvaeo迪尼um，称为Valvaeodinium hymenosynypha（Morbey）Lindström comb。nov.在丹麦盆地的Rhaetian地层中出现的Valvaeodinium hymenosynypha表明，洞穴状Valvaeo迪尼um囊肿的谱系起源于三叠纪晚期，与该属的一个chorate物种一起。处女膜虫Valvaeodinium hymenosynypha似乎在三叠纪末大灭绝后才幸存下来，因为它也存在于最早的荷塘阶。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.