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英文中文

Paleoecology of Early Ladinian low-diversity radiolarian fauna from Mt. Svilaja (External Dinarides, Croatia) 克罗地亚Svilaja山早拉丹世低多样性放射虫动物群的古生态学研究

IF 0.7 Q4 PALEONTOLOGY

REVUE DE MICROPALEONTOLOGIE

Pub Date : 2025-04-03 DOI: 10.1016/j.revmic.2025.100841

Špela Goričan , Tea Kolar-Jurkovšek , Dunja Aljinović , Tamara Troskot-Čorbić , Bogdan Jurkovšek

Dark-grey cherty limestone from Mt. Svilaja contains moderately well-preserved radiolarians of unusually low diversity. Nineteen genera were encountered, namely, only one fourth of genera known from the time equivalent Buchenstein Formation. Based on conodonts, the studied interval is assigned to the Lower Ladinian Budurovignathus hungaricus Zone. Ammonoids and allochthonous fossil elements (calcareous algae, corals, brachiopods, bivalves, benthic foraminifera, terrestrial-plant remains) from the same interval were previously reported. Facies and organic-matter analyses support the interpretation of depositional setting in a semi-enclosed basin with oxygen-deficient bottom waters. The radiolarian assemblage consists of spherical Entactinaria (Pentactinocarpidae, Heptacladidae, Hindeosphaeridae) and Spumellaria (Archaeocenosphaera, Paurinella, Triassospongosphaera, Spongopallium), and monocyrtid Nassellaria (mostly Hozmadia). Among Pentactinocarpidae, Lobactinocapsa ellipsoconcha Dumitrica is abundant and characterized by considerable variability of the cortical shell regarding its shape (ovoid to spherical), wall thickness (single-layered to spongy), and number of external spines. Eptingiidae, Oertlispongidae, Relindellidae, and all multicyrtid Nassellaria, common in the Buchenstein Formation as well as in radiolarian cherts associated with ophiolites, are missing. Similar, although less drastically reduced radiolarian fauna is known from the coeval San Giorgio Dolomite, which was also deposited in an oxygen-deficient intra-platform basin. The San Giorgio fauna lacks multicyrtid Nassellaria but still contains abundant Eptingiidae, Oertlispongidae, and Relindellidae. The likely factor reducing the diversity in the intra-platform basins was the vertical extent of the oxygen-deficient lower water column. Only surface-dwelling radiolarians were successful in stratified basins with expanded deep-water hypoxia.

来自斯维拉加山的深灰色樱桃状石灰岩含有保存较好的放射虫，其多样性异常低。他们发现了19个属，也就是说，只有四分之一的属是在同等时间的布亨斯坦地层中发现的。根据牙形刺，将研究区间划分为下拉底统Budurovignathus hungaricus带。来自同一区间的氨类和异域化石元素（钙质藻类、珊瑚、腕足类、双壳类、底栖有孔虫、陆生植物残骸）已被报道过。相和有机质分析支持对底水缺氧的半封闭盆地沉积背景的解释。放射虫群主要由球形盘虫属（Pentactinocarpidae, Heptacladidae, hinindeosphaidae）和Spumellaria （Archaeocenosphaera, Paurinella, Triassospongosphaera, sponopallium）和单圆虫属（moncytid Nassellaria，主要为Hozmadia）组成。在Pentactinocarpidae中，Lobactinocapsa ellipsoconcha Dumitrica数量丰富，其特征是皮质壳的形状（卵形到球形）、壁厚（单层到海绵状）和外棘的数量具有相当大的可变性。在Buchenstein组以及与蛇绿岩相关的放射虫岩中常见的Eptingiidae， Oertlispongidae， Relindellidae和所有多圆柱Nassellaria都缺失。类似的，虽然减少较少的放射虫动物群在同时期的圣乔治白云岩中也被发现，它也沉积在一个缺氧的台地内盆地中。圣乔治区系缺乏多圆柱鼻虫科，但仍有丰富的Eptingiidae、Oertlispongidae和Relindellidae。台内盆地多样性降低的可能因素是缺氧下水柱的垂直程度。只有表层放射虫在深水缺氧扩大的层状盆地中存活。

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引用次数: 0

Editorial preface to the INTERRAD XVI Virtual Special Issue on Mesozoic and Cenozoic Radiolaria INTERRAD第十六期中生代和新生代放射虫虚拟特刊编辑序

IF 0.7 Q4 PALEONTOLOGY

REVUE DE MICROPALEONTOLOGIE

Pub Date : 2025-03-26 DOI: 10.1016/j.revmic.2025.100842

Špela Goričan , Luis O'Dogherty , Giuseppe Cortese

引用次数: 0

What is Pattersoncypris Bate (Ostracoda: Cyprididae)? A review of the genus and its species 什么是鲤科（介形虫目：鲤科）？标题本属及其种综述

IF 0.7 Q4 PALEONTOLOGY

REVUE DE MICROPALEONTOLOGIE

Pub Date : 2025-03-05 DOI: 10.1016/j.revmic.2025.100833

Renata Juliana Arruda Maia , Débora Almeida-Lima , Juliana Guzmán , Enelise Katia Piovesan

Pattersoncypris is a fossil ostracod genus represented by fourteen species recovered in non-marine, transitional and marine Cretaceous deposits from Brazil, Argentina, Liberia, Congo, Gabon, Angola, and Chad, and USA. As it is an abundant and diversified genus of the Early Cretaceous sedimentary basins of Brazil and Africa related to the opening of the South Atlantic Ocean, taxonomic misidentifications, which have been recurrently occurring with Pattersoncypris species, lead to problems regarding biostratigraphic, paleozoogeographic and paleoenvironmental interpretation. Face to this problem, the aim of this work was to study the morphological variations present in Pattersoncypris species, to identify the most robust diagnostic features that will allow reliable identification of the species, as well as to provide data that will facilitate understanding of the evolutionary history of the genus and its paleozoogeographic distribution. The genus was reviewed from morphological and taxonomic aspects. Ten species underwent taxonomic amendments, and a new species Pattersoncypris labiata n. sp. was proposed. Data analysis indicated that Pattersoncypris is an euryhaline genus that originated in the Gondwana continent, in the region that became the African Continent, from an ancestor of the genus Hourcqia, probably in the early Aptian. The adaptive radiation of the genus peaked during the Aptian, with the diversity center located in northeast Brazil. From the Albian onwards, there was a reduction in richness, with fewer species being recorded in Africa. An interval with no recorded species occurred during the early–middle Cenomanian. A single species was recorded in the late Cenomanian in USA, and by the end of this age, the genus was extinct.

patterson塞浦路斯是一个介形虫属化石，在巴西、阿根廷、利比里亚、刚果、加蓬、安哥拉、乍得和美国的白垩纪非海洋、过渡和海洋沉积物中发现了14种。由于它是与南大西洋开放有关的巴西和非洲早白垩世沉积盆地中数量丰富且种类多样的属，因此在分类上经常发生误认，给生物地层学、古动物地理和古环境解释带来了问题。面对这一问题，本研究的目的是研究pattersoncyrus物种的形态变化，确定最可靠的诊断特征，从而可靠地识别物种，并提供有助于理解该属的进化史及其古动物地理分布的数据。从形态学和分类学两个方面对该属进行了综述。对10个种进行了分类修正，并提出了一个新种——唇形蛇（pattersoncyris labiata n. sp）。数据分析表明，patterson塞浦路斯属是一种泛盐属，起源于冈瓦纳大陆，在后来成为非洲大陆的地区，来自可能在阿普tian早期的Hourcqia属的祖先。该属的适应辐射在Aptian时期达到顶峰，多样性中心位于巴西东北部。从阿尔及利亚开始，物种的丰富度下降，在非洲记录到的物种越来越少。Cenomanian早期-中期出现了一个没有物种记录的间歇期。在美国的塞诺曼尼亚晚期记录了一个物种，到这个时代结束时，这个属已经灭绝了。

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引用次数: 0

Ostracods taxonomic study and other faunistic record from Costa Bausa (Buccheri, Southeastern Sicily) 西西里岛东南部海岸Bausa （Buccheri）介形虫分类研究及其他动物群记录

IF 0.7 Q4 PALEONTOLOGY

REVUE DE MICROPALEONTOLOGIE

Pub Date : 2025-01-20 DOI: 10.1016/j.revmic.2024.100830

Francesco Sciuto , Angela Baldanza , Agatino Reitano

In Costa Bausa, along the left side of the Torrente Mazzarino (NE Buccheri, SE Sicily), marine sands referred to the Pliocene by many authors for their stratigraphic position and the molluscs fauna they contain, crop out unconformably above the Miocene carbonate succession. In the present study, the taxonomy of ostracods of these sands is performed and new species are described, the foraminifera are analyzed for the first time and a taxonomic list of molluscs is also provided. The ostracod fauna is composed of specimens mostly belonging to shallow marine genera, such as Aurila, Neonesidea, Bosquetina, Callistocythere, Carynocythereis, Cistacythereis, Cytherelloidea, Cytheretta, Costa, Graptocythere, Grinioneis, Loxoconcha, Mutilus, Caudites, Pontocythere, Semicytherura, Tenedocythere, Urocythereis, Verrucocythereis and Xestoleberis. Among them, eight species are newly described: Perissocytheridea (Kroemmelbeinella) hiblaea n. sp., Aurila costabausaensis n. sp., Aurila daphnidis n. sp., Aurila mazzarinoensis n. sp., Aurila sanctiandreae n. sp., Tenedocythere forticostata n. sp., Cytheretta buccheriensis n. sp., Verrucocythereis verrucomurata n. sp.

Among planktonic foraminifera, only few specimens of Orbulina universa, O. suturalis, Trilobatus trilobus and T. sacculifer occur. The assemblage of benthic foraminifera is characterized by Amphistegina lobifera, A. lessonii, Elphidium crispum, E. macellum, Ammonia beccarii, A. parkinsoniana, Lobatula lobatula, Cancris auricula, Patellina corrugata, Quinqueloculina seminulum, Massilina oblonga, Oolina exagona and O. lineata.

The molluscs association found has helped to relate the studied levels to the Late Pliocene.

在Costa Bausa，沿着Torrente Mazzarino的左侧（布切里东北部，西西里岛东南部），海相砂被许多作者称为上新世，因为它们的地层位置和它们所包含的软体动物动物群，在中新世碳酸盐序列之上不整合地出现。本文对这些沙洲的介形类进行了分类，发现了新种，首次对有孔虫类进行了分析，并编制了软体动物分类表。甲壳类动物区系主要由浅海属的Aurila、Neonesidea、Bosquetina、Callistocythere、Carynocythereis、Cistacythereis、Cytherelloidea、Cytheretta、Costa、Graptocythere、Grinioneis、Loxoconcha、Mutilus、Caudites、Pontocythere、半ytherura、Tenedocythere、Urocythereis、Verrucocythereis和Xestoleberis等标本组成。其中，新发现的有孔虫有8种，分别为：大耳虫（Kroemmelbeinella） hiblaea n. sp、海耳虫（Aurila costabausaensis n. sp）、水耳虫（Aurila daphnidis n. sp）、mazzarinoensis n. sp、sanctiandreae n. sp、tendocythere forticostata n. sp、Cytheretta bucheriensis n. sp、Verrucocythereis verrucomurata n. sp。在浮游有孔虫中，只有Orbulina universa、O. suturalis、Trilobatus trilobus和T. sacullifer出现过。底栖有孔虫的群落特征为：圆叶Amphistegina loifera、A. lessonii、Elphidium crispum、E. macellum、amcarii、A. parkinsoniana、Lobatula Lobatula、canris auricula、Patellina walgata、Quinqueloculina semulum、masilina oblonga、Oolina ona和O. lineata。发现的软体动物关联有助于将所研究的水平与上新世晚期联系起来。

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引用次数: 0

Spumellarian, collodarian, and entactinarian radiolarians observed in sediment traps from the southern Ionian Sea (eastern mediterranean) 在爱奥尼亚海南部（地中海东部）沉积物捕集器中观察到的 Spumellarian、collodarian 和 entactinarian 放射虫

IF 0.7 Q4 PALEONTOLOGY

REVUE DE MICROPALEONTOLOGIE

Pub Date : 2024-12-04 DOI: 10.1016/j.revmic.2024.100820

Marie Cueille , Taniel Danelian , Kenji M. Matsuzaki

Based on sediment trap material collected from the southern Ionian Sea (Eastern Mediterranean), this study describes and illustrates 54 radiolarian species, 48 of which are spumellarians, 3 collodarians and 3 entactinarians. The presence of Larcopyle buetschlii chenmuhongi, Phorticium polycladum, and Polysolenia collina is reported for the first time from the Mediterranean Sea. We also identified for the first time Spongodendron macrodoras in the eastern Mediterranean Sea, previously known only from the western Mediterranean. Despite their geographical proximity, only six species are in common with the radiolarian fauna of the Adriatic Sea. We reviewed the biogeographical distribution and the known depth habitat of all species identified here at the species level. Most of them are known from tropical to temperate regions, although we also encountered few species with cold-water affinities such as Lithelius minor, Lithelius nautiloides, Hexacromyum enthacanthum, Rhizosphaera mediana, and Spongodiscus resurgens. Most of the encountered species are surface to sub-surface dwellers, including several known symbiont-bearing species, and only few are deep-dwellers, such as Hexacromyum enthacanthum, Tetrapetalon echinaster, Lithelius nautiloides and Lithelius minor.

本文利用东地中海爱奥尼亚海南部沉积物捕集器资料，对54种放射虫进行了描述和图解，其中48种为针状虫，3种为胶体虫，3种为针状虫。本文首次在地中海发现了布氏拉孔虫（Larcopyle buetschlii chenmuhongi）、聚枝兰（Phorticium polycladum）和水蛭（Polysolenia collina）。我们还首次在地中海东部发现了大Spongodendron macrodoras，以前只在地中海西部发现。尽管地理位置接近，但与亚得里亚海放射虫动物群共有的物种只有6种。在物种水平上回顾了所有物种的生物地理分布和已知的深度栖息地。它们大部分分布在热带至温带地区，但也有一些与冷水有亲缘关系的种，如小石螺（Lithelius minor）、鹦鹉螺（Lithelius nautiloides）、棘棘螺（Hexacromyum enthacanthum）、mediana、Spongodiscus resurgens等。大多数遇到的物种是地表到地下的居民，包括一些已知的共生物种，只有少数是深海居民，如Hexacromyum enthacanthum， Tetrapetalon echinaster， Lithelius nautiloides和Lithelius minor。

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引用次数: 0

Progress on late Paleozoic radiolarians and their biostratigraphic applications – In memory of Martial CARIDROIT 晚古生代放射虫及其生物地层学应用研究进展——纪念马夏·卡里德罗

IF 0.7 Q4 PALEONTOLOGY

REVUE DE MICROPALEONTOLOGIE

Pub Date : 2024-12-01 DOI: 10.1016/j.revmic.2024.100821

Taniel Danelian , Paula Noble , Patrick De Wever

引用次数: 0

Radiolarian age and geochemical characteristics of the Permian bedded chert sequence in the Soi Dao area, Chanthaburi, Southeast of Thailand 泰国东南部尖竹汶府 Soi Dao 地区二叠纪层状燧石序列的放射虫年龄和地球化学特征

IF 0.7 Q4 PALEONTOLOGY

REVUE DE MICROPALEONTOLOGIE

Pub Date : 2024-12-01 DOI: 10.1016/j.revmic.2024.100786

Waraphorn Phromsuwan , Yoshihito Kamata , Takuya Hayashi , Kei-ichi Kobayashi , Thasinee Charoentitirat , Katsumi Ueno , Apsorn Sardsud

Radiolarian assemblages and geochemistry from Permian chert and siliceous mudstone in the Soi Dao, Chanthaburi area of southeastern Thailand, are used here to determine the age and depositional environment of these rocks. Moderate-to-well preserved radiolarian were obtained from three study areas, from bedded cherts and siliceous mudstones of Early Asselian to Early Capitanian, Sakmarian to Roadian, and Capitanian to Changhsingian age. Considering the lithofacies, age, and chemical composition of the rocks, a primary stratigraphy can be reconstructed that consists, in ascending order, of basaltic rocks, radiolarian bedded cherts, siliceous mudstones, and clastics made of alternations of sandstone and mudstone. Geochemical analyses, particularly chondrite-normalized REEs patterns of chert and siliceous mudstone, show a gradual change in the degree of the Ce-negative anomaly, which decrease towards the younger strata. This change indicates that the depositional environment of the Permian rock was at the beginning highly influenced by hydrothermal activity, which decreased with time, while the influx of terrestrial clastics increased. Permian bedded cherts accompanied by basalts and siliceous mudstones recognized in the study area are very similar to the Paleo-Tethys bedded cherts in terms of their lithofacies and microscopic features; however, their depositional period is much shorter, indicating that they were deposited in another oceanic basin (i.e., a back-arc basin). The chemical composition also shows that the influence of hydrothermal activity weakened over time and the influence of terrigenous clastics increased.

本文利用泰国东南部Chanthaburi地区Soi Dao二叠纪燧石岩和硅质泥岩的放射虫组合和地球化学特征，确定了这些岩石的年龄和沉积环境。在早亚塞利世至早卡比塔世、萨克玛丽安至罗迪亚世、卡比塔世至长兴世三个研究区均获得了保存较好的放射虫。考虑到岩石的岩相、年龄和化学成分，可以重建一个由玄武岩、放射虫层状燧石、硅质泥岩以及砂岩和泥岩交替形成的碎屑组成的初级地层。地球化学分析，特别是燧石和硅质泥岩的球粒陨石归一化稀土模式，显示ce负异常的程度逐渐变化，并向年轻层逐渐减弱。这一变化表明二叠系岩石沉积环境在初期受热液活动的影响较大，随着时间的推移，热液活动的影响逐渐减弱，而陆相碎屑的流入则增加。研究区发现的二叠系玄武岩、硅质泥岩伴生层状燧石岩在岩相和显微特征上与古特提斯层状燧石岩非常相似；但是，它们的沉积期要短得多，表明它们沉积在另一个大洋盆地（即弧后盆地）。化学成分也表明，随着时间的推移，热液活动的影响减弱，陆源碎屑的影响增强。

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引用次数: 0

Preliminary report on Permian radiolarians from the Numakuma peninsula in Japan: Paleontological evidence for the presence of the Ultra-Tamba Belt 关于日本沼沼半岛二叠纪放射虫的初步报告：超丹巴带存在的古生物学证据

IF 0.7 Q4 PALEONTOLOGY

REVUE DE MICROPALEONTOLOGIE

Pub Date : 2024-12-01 DOI: 10.1016/j.revmic.2023.100751

Tsuyoshi Ito, Daisuke Sato

Permian radiolarians were obtained from mudstone of an accretionary complex cropping out on the Numakuma Peninsula of Japan. The establishment of a Permian age for the mudstone suggests that these rocks belong to the Permian accretionary complex and therefore to the Ultra-Tamba Belt.

二叠纪放射虫来自日本Numakuma半岛一个增生杂岩的泥岩。泥岩的二叠纪时代的确定表明这些岩石属于二叠纪增生杂岩，因此属于超坦巴带。

引用次数: 0

Late Permian radiolarian Neoalbaillella caridroiti assemblage from the Loufanggou, Guangyuan-Shangsi area, Sichuan Province, China 中国四川广元上寺地区楼房沟晚二叠世放射虫Neoalbaillella caridroiti组合

IF 0.7 Q4 PALEONTOLOGY

REVUE DE MICROPALEONTOLOGIE

Pub Date : 2024-12-01 DOI: 10.1016/j.revmic.2024.100784

Kiyoko Kuwahara , Akira Yao , Jianxin Yao

A well-preserved Lopingian (Late Permian) radiolarian assemblage including Neoalbaillella has been recovered from the Loufanggou 2 section of the Dalong Formation in northern Sichuan, China. The assemblage consists mainly of spherical radiolarians with spongy tests, such as Entactinaria and Spumellaria. Albaillellaria and Latentifistularia are relatively rare in the assemblage. The occurrence of Neoalbaillella caridroiti nov. sp., Neoalbaillella antaixiangi Yao and Kuwahara and Albaillella triangularis Ishiga, Kito and Imoto indicates that the Loufanggou 2 section may be correlated with the Neoalbaillella optima assemblage zone. Until now, only Neoalbaillella caridroiti nov. sp. and Neoalbaillella antaixiangi were known to occur in the northern Sichuan area. This limited occurrence indicates the possibility that the Dalong Formation depositional basin in northern Sichuan Province was a geographically limited area, and the radiolarian assemblage shows its provincialism.

在川北大龙组楼房沟2剖面发现了保存完好的罗平期（晚二叠世）放射虫组合，其中包括Neoalbaillella。该组合主要由具有海绵状试验的球形放射虫组成，如Entactinaria和Spumellaria。albaillaria和latenti瘘管菌在组合中相对罕见。Neoalbaillella caridroiti nov. sp、Neoalbaillella anttaixiangi Yao and Kuwahara、Albaillella triangularis Ishiga、Kito和Imoto的出现表明楼方沟2剖面可能与Neoalbaillella optima组合带有关。迄今为止，川北地区仅发现caridroiti新白菌和anttaixiangi新白菌。这一有限产状表明川北大龙组沉积盆地可能是一个地理上有限的区域，放射虫组合也显示出其地方性。

引用次数: 0

Desmoinesian (middle Pennsylvanian) radiolarians from the Excello Shale of Kansas, USA 美国堪萨斯州 Excello 页岩中的 Desmoinesian（宾夕法尼亚中期）放射虫

IF 0.7 Q4 PALEONTOLOGY

REVUE DE MICROPALEONTOLOGIE

Pub Date : 2024-12-01 DOI: 10.1016/j.revmic.2024.100772

Galina P. Nestell , John P. Pope , Merlynd K. Nestell

Desmoinesian (Middle Pennsylvanian) radiolarians are described from carbonate concretions found in the black phosphatic facies in strata of the Excello Shale Member of the Fort Scott Limestone (Marmaton Group) in southeastern Kansas (K69 section), USA. Ten new species of radiolarians are described: Albaillella kansaensis, Holdsworthella trifurca, Pseudoalbaillella deformata, Entactinia jayhawkensis, E. heckeli, E. boardmani, Apophysiacus martiali, Moskovistella insolita, Palacantholithus umbrelliformis, and Ormistonella perrara. The Kansas radiolarian assemblage is different from the assemblage described from the Excello Shale of Iowa in the preservation and taxonomic composition. The radiolarians are preserved as pyritized internal molds or regular tests replaced by pyrite, and unidentifiable organic material. The domination of entactinarians and albaillellarians in the Kansas assemblage and their poor to excellent preservation indicate the formation of early diagenetic calcareous concretions in anoxic conditions. The appearance of the spicular radiolarian genus Palacantholithus indicates an influx of relatively cold water connected with upwelling. The Kansas location was much farther offshore (450 km basinward) compared to the Iowa localities suggesting a difference in thermocline depth, affecting water temperature, oxygenation, and nutrients.

在美国堪萨斯州东南部（K69剖面）的Fort Scott石灰岩（Marmaton群）的Excello页岩段地层中发现的黑色磷酸盐相碳酸盐结块中发现了德蒙因世（中宾夕法尼亚）放射虫。报道了10个放射虫新种：kansaalbaillella， Holdsworthella trifurca, Pseudoalbaillella deformata, Entactinia jayhawkensis， E. heckeli， E. boardmani, Apophysiacus martiali, Moskovistella solinita， Palacantholithus umbrelliformis和Ormistonella perrara。堪萨斯州放射虫组合在保存和分类组成上与爱荷华州Excello页岩所描述的组合不同。放射虫被保存为黄铁矿化的内部模具或由黄铁矿代替的常规测试，以及无法识别的有机物质。在堪萨斯组合中占主导地位的是entactinarians和albaillellarians，它们的保存状况从差到好表明在缺氧条件下形成早期成岩钙质结块。刺状放射虫属Palacantholithus的出现表明与上升流有关的相对冷水的流入。与爱荷华州相比，堪萨斯州的位置离岸更远（向盆地450公里），这表明温跃层深度的差异，影响了水温、氧合和营养。

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