Geobios最新文献 - Book学术

Tsuga leaves from the Neogene Baoshan Basin in southwest China and their palaeoecological implications 中国西南新近纪宝山盆地出土的簇叶及其古生态学意义

IF 1.6 4区地球科学 Q2 PALEONTOLOGY

Geobios

Pub Date : 2024-10-01 DOI: 10.1016/j.geobios.2024.08.004

Hao-Ran Zong , Jin-Jin Hu , Nian Wang , Yong-Jiang Huang

Tsuga (Endl.) Carrière (Pinaceae) has a rich fossil record represented by pollen, leaves, wood and seed cones. Although fossil leaves of the genus have been widely documented, most of them have not been examined microscopically, which may limit their taxonomic resolution. In this study, three-dimensionally preserved leaves and leaf fragments of Tsuga from the Neogene (latest Miocene to Pliocene) Baoshan Basin in western Yunnan, southwest China, were examined both morphologically and micromorphologically. The fossil leaves are characterized by flattened and bifacial shape, round to obtuse apex and petiolate base, adaxially sunken and abaxially elevated midvein, adaxial surface without stomata and with elongated, smooth-margined epidermal cells, and abaxial surface with two stomatal bands along the midvein, each stomatal band consisting of 6–8 longitudinal stomatal lines. Based on comparisons with extant species of the genus, we found that the fossil leaves show the closest affinity to Tsuga dumosa (D. Don) Eichler, an extant species growing in the modern western Yunnan. As modern species of Tsuga prefer humid conditions, our fossil find suggests a humid climate in the Baoshan Basin at the time of fossil deposition, probably due to the influence of the Indian summer monsoon from the southwest. This is consistent with previous results of quantitative palaeoclimate reconstructions using spore/pollen fossil assemblages. Our study provides new fossil evidence for the origin of modern conifer diversity in southwest China. It highlights the importance of microscopic studies in the taxonomic resolution of fossil leaves of Pinaceae.

松科植物津贺（Tsuga (Endl.) Carrière）有丰富的化石记录，包括花粉、叶片、木材和球果。虽然该属植物的叶化石已被广泛记录，但其中大部分尚未进行显微镜检查，这可能会限制其分类学分辨率。本研究从形态学和显微形态学两方面对中国西南部云南西部保山盆地新近纪（晚中新世至上新世）保存的津叶化石叶片和叶片碎片进行了研究。化石叶片的特征是扁平的二面形，先端圆形至钝，基部具叶柄，中脉正面凹陷，背面隆起，正面无气孔，表皮细胞细长，边缘光滑，背面沿中脉有两条气孔带，每条气孔带由 6-8 条纵向气孔线组成。根据与该属现生物种的比较，我们发现化石叶片与生长在现代云南西部的现生物种 Tsuga dumosa (D. Don) Eichler 的亲缘关系最近。由于现代津贺树种喜欢潮湿的环境，我们的化石发现表明化石沉积时保山盆地气候潮湿，这可能是由于来自西南的印度夏季季风的影响。这与之前利用孢子/花粉化石组合进行定量古气候重建的结果一致。我们的研究为中国西南地区现代针叶树多样性的起源提供了新的化石证据。它强调了显微镜研究在松科植物化石叶片分类解析中的重要性。

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引用次数: 0

A review of the Late Miocene herpetofauna of the Keinar locality of Moldova 摩尔多瓦 Keinar 地区晚中新世动物群回顾

IF 1.6 4区地球科学 Q2 PALEONTOLOGY

Geobios

Pub Date : 2024-10-01 DOI: 10.1016/j.geobios.2024.08.005

Elena Syromyatnikova , Oleg Redkozubov

Small fossil amphibians and reptiles from the Late Miocene of the Keinar locality of Moldova are reviewed for the first time. The following taxa are described: Mioproteus caucasicus, Chelotriton sp., Latonia sp., Pelobates sp., Pelophylax sp., “Colubrinae” indet., Natrix sp., two Vipera spp. (“Vipera aspis complex” and “Oriental vipers complex”), and Squamata indet. Among them, Pelobates sp. exhibits the characters which occur in the Early–Late Miocene (presence of both pit-and-ridge and pustular sculptures of the frontoparietal bone) and in the Pliocene (short frontoparietal–squamosal contact) members of the genus; this combination is not observed in any other Pelobates species. The viperid snake of the “Vipera aspis complex” is recorded from Moldova for the first time.

首次对摩尔多瓦凯纳尔地区晚中新世的小型两栖类和爬行类化石进行了回顾。文中描述了以下类群：Mioproteus caucasicus、Clotriton sp.、Latonia sp.、Pelobates sp.、Pelophylax sp.、"Colubrinae "indet.、Natrix sp.、两种蝰蛇属（"蝰蛇复合体 "和 "东方蝰蛇复合体"），以及 Squamata indet.。其中，Pelobates sp.具有早中新世-晚中新世（前顶骨有坑脊和脓疱状雕刻）和上新世（前顶骨-鳞片接触面短）成员的特征；这种组合在其他 Pelobates 种类中均未发现。摩尔多瓦首次记录到 "Vipera aspis complex "蝰蛇。

引用次数: 0

A rare ‘flat-headed’ pachycephalosaur (Dinosauria: Pachycephalosauridae) from West Texas, USA, with morphometric and heterochronic considerations 来自美国西得克萨斯州的罕见 "平头 "棘头龙（恐龙亚目：棘头龙科）及其形态计量学和异时性考量

IF 1.6 4区地球科学 Q2 PALEONTOLOGY

Geobios

Pub Date : 2024-10-01 DOI: 10.1016/j.geobios.2024.08.006

Steven L. Wick , Thomas M. Lehman

A juvenile pachycephalosaur frontal from the upper Aguja Formation (Late Cretaceous: middle Campanian) of West Texas, USA is unusually thin dorsoventrally, even compared to ‘flat’ frontals of young individuals pertaining to other pachycephalosaur taxa. The specimen is most comparable morphologically and morphometrically to Stegoceras validum. However, it is much thinner than any ‘juvenile’ example of that species, and also differs in the elongate form and radial arrangement of the surficial tubercles, as well as occurrence of radial grooves along the lateral margins of the bone. Such differences are unlikely a reflection of intraspecific variation. Instead, the Aguja specimen likely represents a previously unknown juvenile semaphoront from the southern Western Interior, referred herein to Stegoceras sp. and likely extends the distribution of this widespread Campanian genus. A morphometric evaluation suggests that the holotype specimen of Texacephale langstoni, also from the Aguja Formation, is probably an adult semaphoront of Stegoceras. However, both specimens represent different ontogenetic stages with dissimilar morphologies and so their potential conspecifity remains equivocal. The new Aguja specimen described herein likely represents a ‘paedomorphic’ Campanian pachycephalosaur – one where the onset of doming is displaced until well into ontogeny – a heterochronic attribute Stegoceras sp. shares with S. validum and Pachycephalosaurus wyomingensis. Where an adequate ontogenetic sample is available for comparison, other pachycephalosaur taxa do not seem to exhibit a similar growth progression, and so this appears to be a significant taxonomic characteristic. That some pachycephalosaurs delayed doming of the skull roof during growth is enigmatic, but it may have been an expression of sexual dimorphism, an aid in species recognition, or a response to harsh environmental conditions.

美国德克萨斯州西部上阿古哈地层（晚白垩世：坎帕年中期）出土的一只幼年棘皮龙正面背侧异常纤细，即使与其他棘皮龙类群幼年个体 "扁平 "的正面相比也是如此。该标本在形态和形态计量学上与 Stegoceras validum 最为相似。但是，它比该种的任何 "幼年 "标本都要薄得多，而且在表面小瘤的细长形式和径向排列以及沿骨骼侧缘出现的径向沟槽方面也有所不同。这些差异不太可能是种内变异的反映。相反，Aguja标本很可能代表了西部内陆南部一种以前未知的幼年半齿龙，在这里被称为 Stegoceras sp.，并很可能扩大了这一广泛分布的坎帕尼亚属的分布范围。形态评估表明，同样产自阿古哈地层的 Texacephale langstoni 的主模式标本很可能是 Stegoceras 的成年半拟真体。然而，这两个标本代表了不同的发育阶段，形态各异，因此它们的潜在同种性仍然不明确。这里描述的新的 Aguja 标本很可能代表了一种 "paedomorphic "的坎帕尼亚棘头龙--这种棘头龙的穹顶开始阶段要到成熟期以后才会出现--这是 Stegoceras sp.与 S. validum 和 Pachycephalosaurus wyomingensis 的共同特征。在有足够的个体发育样本进行比较的情况下，其他棘头龙类群似乎没有表现出类似的生长进程，因此这似乎是一个重要的分类学特征。一些棘头龙在生长过程中推迟了颅顶的穹隆，这一点令人费解，但它可能是性二型的一种表现，有助于物种识别，或者是对恶劣环境条件的一种反应。

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引用次数: 0

Early Pliocene Spalacinae from the locality of Afşar, western Turkey 来自土耳其西部阿夫沙尔地区的早上新世 Spalacinae

IF 1.6 4区地球科学 Q2 PALEONTOLOGY

Geobios

Pub Date : 2024-10-01 DOI: 10.1016/j.geobios.2024.08.007

Panagiotis Skandalos , Fatma Arzu Demirel , Mehmet Cihat Alçiçek , Serdar Mayda , Lars W. van den Hoek Ostende

Spalacinae are an unusual component of the fossil record around the world with a limited geographical distribution. The revisited section of Afşar includes one of the richest collections of Spalacinae in Turkey. From Afşar 1, near the base of the section we recovered Pliospalax cf. macoveii while in Afşar 2, at the top of the section we distinguish the species P. tourkobouniensis. The current research includes the first record of the last-mentioned species outside of Europe. Both spalacines indicate a dry and open space environment and, in accordance with the Arvicolinae, suggest that Afşar 1 can be attributed to MN 15 while Afşar 2 is correlated to MN 16.

Spalacinae 是全世界化石记录中一个不寻常的组成部分，地理分布有限。重新考察的阿夫沙尔剖面包括土耳其最丰富的 Spalacinae 类群之一。在阿夫沙尔 1 号地段的底部附近，我们发现了 Pliospalax cf. macoveii，而在阿夫沙尔 2 号地段的顶部，我们发现了 P. tourkobouniensis。目前的研究包括最后提到的物种在欧洲以外的首次记录。这两种刺桐都显示了干燥和空旷的环境，并与 Arvicolinae 相一致，表明阿夫沙尔 1 号可归属于 MN 15，而阿夫沙尔 2 号则与 MN 16 相关。

引用次数: 0

Biochronostratigraphy and palaeobiogeography of Echioceratidae (Ammonitina) from the Raricostatum Zone (Aplanatum Subzone) in NW Iberia 伊比利亚西北部 Raricostatum 区（Aplanatum 亚区）Echioceratidae（Amonitina）的生物时层图和古生物地理学

IF 1.6 4区地球科学 Q2 PALEONTOLOGY

Geobios

Pub Date : 2024-10-01 DOI: 10.1016/j.geobios.2024.08.002

Íñigo Vitón , María José Comas-Rengifo , Luís V. Duarte , Antonio Goy

This paper examines the uppermost Sinemurian and lowermost Pliensbachian ammonite fauna recorded in NW Iberia with a special focus on Echioceratidae from the Aplanatum Subzone. In total, 852 specimens have been collected bed-by-bed from five reference sections from the Asturian, Basque-Cantabrian, and Lusitanian basins. Echioceratidae, namely Paltechioceras genus, represent 86.2% of the sample, Polymorphitidae (Leptonotoceras genus) the 10%, and less than 4% of the specimens are Eoderoceratidae, Phricodoceratidae, or Oxynoticeratidae. This study describes five species of Paltechioceras, namely P. tardecrescens, P. oosteri, P. recticostatum, P. elicitum, and P. romanicum. They allow a biochronostratigraphic division for the studied basins and its worldwide correlation. One of the species, P. romanicum, is the latest one registered in all the studied sections, occurring directly below the Sinemurian–Pliensbachian boundary. The disappearance of this widely distributed species marks the echioceratids extinction. This work reviews the global events described around the Sinemurian–Pliensbachian transition (the Sinemurian–Pliensbachian boundary event). Finally, we present a palaeobiogeographical analysis of the Paltechioceras species described, giving more information to discuss the opening of the Hispanic Corridor during the late Sinemurian.

本文研究了伊比利亚西北部记录到的最上新（Sinemurian）期和最下普利恩巴赫（Pliensbachian）期的鹦鹉螺动物群，特别关注 Aplanatum 亚区的 Echioceratidae。总共从阿斯图里亚斯、巴斯克-坎塔布里亚和卢西坦盆地的五个参考剖面逐层采集了 852 个标本。样本中 Echioceratidae（即 Paltechioceras 属）占 86.2%，Polymorphitidae（Leptonotoceras 属）占 10%，Eoderoceratidae、Phricodoceratidae 或 Oxynoticeratidae 标本不足 4%。本研究描述了五种 Paltechioceras，即 P. tardecrescens、P. oosteri、P. recticostatum、P. elicitum 和 P. romanicum。通过它们可以对所研究的盆地进行生物年代地层划分，并在全球范围内进行相关划分。其中一个物种，P. romanicum，是所有研究剖面中记录的最晚的物种，出现在新元古代-渐新巴赫期边界的正下方。这一分布广泛的物种的消失标志着贻贝类的灭绝。本研究回顾了围绕新志留纪-皮邻巴奇纪过渡时期所发生的全球性事件（新志留纪-皮邻巴奇纪边界事件）。最后，我们对所描述的Paltechioceras物种进行了古生物地理学分析，为讨论新元古代晚期西班牙走廊的开辟提供了更多信息。

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引用次数: 0

Tuff deposits as preservational context for a Miocene continental mammal assemblage from Patagonia, Argentina 凝灰岩沉积是阿根廷巴塔哥尼亚中新世大陆哺乳动物群的保存背景

IF 1.6 4区地球科学 Q2 PALEONTOLOGY

Geobios

Pub Date : 2024-10-01 DOI: 10.1016/j.geobios.2024.08.003

Rodrigo L. Tomassini , Claudia I. Montalvo , José I. Cuitiño , María Susana Bargo , Sergio F. Vizcaíno

The CO tuff is one of the volumetrically largest volcaniclastic events so far recorded in the Early-Middle Miocene Santa Cruz Formation (Patagonian Argentina). It represents aeolian processes, related with westerlies, that reworked and transported enormous quantities of volcanic ash from the Andes into the continental interior that accumulated in fluvial floodplain deposits. This volcanic event generated a major environmental change at ∼17 Ma (Burdigalian) and hostile living conditions for the biota of the area, at least during the time of deposition. We performed here a comprehensive study including taxonomic, sedimentological, and taphonomic aspects of the mammal assemblage recovered from this tuff deposit. The assemblage is constituted by representatives of Microbiotheria, Paucituberculata, Folivora, Cingulata, Rodentia, Notoungulata, and Litopterna, reflecting a wide mammalian diversity. The formation of the assemblage can be linked to a normal attritional model, in which the death of the individuals and subsequent deposition and burial of their remains would have occurred gradually over time, simultaneously with the accumulation of volcanic ash, at the place of death or very close to it. The time between the death and burial would have been relatively short, in accordance with the rapid and continuous influx of volcanic ash to the depositional environment. This multidisciplinary study allows us to interpret and reconstruct the possible taphonomic pathways of the mammal assemblage and to provide novel information on this particular preservation context linked to volcanically-influenced fluvial environments.

CO 凝灰岩是迄今为止在早中新世圣克鲁斯地层（阿根廷巴塔哥尼亚）中记录到的体积最大的火山碎屑事件之一。它代表了与西风有关的风化过程，将大量火山灰从安第斯山脉重新加工并运送到大陆内部，堆积在河漫滩沉积物中。这一火山事件在 ∼17 Ma（布迪加里期）造成了重大的环境变化，至少在沉积期间，该地区生物群的生存条件十分恶劣。我们在此对从该凝灰岩沉积物中发现的哺乳动物群进行了包括分类学、沉积学和岩石学在内的全面研究。该动物群由微生动物门（Microbiotheria）、侏儒动物门（Paucituberculata）、褶皱动物门（Folivora）、啮齿动物门（Cingulata）、啮齿动物门（Rodentia）、侏儒动物门（Notoungulata）和哺乳动物门（Litopterna）的代表动物组成，反映了哺乳动物的广泛多样性。在这种模式中，个体的死亡以及随后的遗骸沉积和埋葬是随着时间的推移逐渐发生的，与此同时，火山灰也在死亡地点或非常靠近死亡地点的地方堆积。死亡和埋葬之间的时间相对较短，这与火山灰快速、持续地涌入沉积环境相一致。这项多学科研究使我们能够解释和重建哺乳动物集合体可能的移生学路径，并提供与受火山影响的河流环境有关的特殊保存环境的新信息。

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引用次数: 0

New Insights on the Upper Triassic Silves Group in Algarve Basin, Portugal: Palynological, paleophytogeography and paleoclimatology advances 葡萄牙阿尔加维盆地上三叠统西尔韦斯组的新发现：古植物学、古地理学和古气候学的进展

IF 1.6 4区地球科学 Q2 PALEONTOLOGY

Geobios

Pub Date : 2024-10-01 DOI: 10.1016/j.geobios.2024.08.001

Margarida Vilas-Boas , Zélia Pereira , Simonetta Cirilli , Paulo Fernandes

This paper presents the results of palynostratigraphic studies in the Silves Group in the Algarve Basin, Portugal. From bottom to top comprises the Silves Sandstones, the Silves Marl-Carbonate Evaporitic Complex, and the Volcano-Sedimentary Series. This study aims to detail the age of the Silves Group, bracketing the Triassic-Jurassic transition, using palynology. For this purpose, 250 samples were collected from 14 main sections. Previous results from a section above the Variscan unconformity, enabled to date the base of the Silves Sandstones and the onset of the Mesozoic sedimentary cycle in the Algarve Basin to lower Carnian. In this work, the top of the Silves Sandstones, containing Camerosporites secatus, Enzonalasporites vigens, Granuloperculatipollis rudis, Lagenella martinii, Patinasporites densus, Samaropollenites speciosus, and Vallasporites ignacii, is dated to the upper Carnian. The base of the Silves Marl-Carbonate Evaporitic Complex, consisting of Alisporites sp., Araucariacites australis, Classopollis meyerianus, Classopollis torosus, Paracirculina quadruplicis and Triadispora sp., indicates an upper Carnian age. The presence of Alisporites diaphanus, Araucariacites australis, Cerebropollenites macroverrucosus, Classopollis meyerianus, Classopollis torosus, Perinopollenites elatoides, Calamospora mesozoica, and Kraeuselisporites reissingeri allows to date the top of the Silves Marl-Carbonate Evaporitic Complex as upper Rhaetian-lower Hettangian. This study allows to date the Silves Group in the Algarve Basin from the lower Carnian to lower Hettangian (Triassic-Jurassic boundary) for the first time. The Carnian microflora provides new insights of the Onslow Microflora in the Western Tethys.

本文介绍了对葡萄牙阿尔加维盆地西尔维斯组的古地层研究结果。从下到上依次为西尔维斯砂岩、西尔维斯泥灰岩-碳酸盐蒸发复合体和火山-沉积系列。这项研究旨在利用古植物学详细了解西尔维斯组的年龄，即三叠纪到侏罗纪的过渡时期。为此，研究人员从 14 个主要地段采集了 250 个样本。之前在瓦利斯坎不整合层之上的一个剖面上取得的结果，确定了西尔维斯砂岩的基底以及阿尔加维盆地中生代沉积周期开始于下卡尼安时期的时间。在这项研究中，包含 Camerosporites secatus、Enzonalasporites vigens、Granuloperculatipollis rudis、Lagenella martinii、Patinasporites densus、Samaropollenites speciosus 和 Vallasporites ignacii 的西尔维斯砂岩顶部被确定为上卡尼安时期。由 Alisporites sp.、Araucariacites australis、Classopollis meyerianus、Classopollis torosus、Paracirculina quadruplicis 和 Triadispora sp.组成的 Silves Marl-Carbonate 蒸发岩复合体的底部表明其年代为上卡诺纪。由于 Alisporites diaphanus、Araucariacites australis、Cerebropollenites macroverrucosus、Classopollis meyerianus、Classopollis torosus、Perinopollenites elatoides、Calamospora mesozoica 和 Kraeuselisporites reissingeri 的存在，可以将 Silves Marl-Carbonate Evaporitic Complex 顶部的年代定为上雷提纪-下黑炭纪。这项研究首次确定了阿尔加维盆地西尔维斯组的年代为下卡尼安至下赫坦纪（三叠纪-侏罗纪边界）。卡年纪的微生物群为西特提斯的昂斯洛微生物群提供了新的见解。

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引用次数: 0

A new epifoliar melioloid fungus from the Siwalik (Miocene) of Himachal sub-Himalaya and its palaeoecological implications 喜马偕尔亚喜马拉雅地区 Siwalik（中新世）出土的一种新的外生瓜耳真菌及其古生态学意义

IF 1.6 4区地球科学 Q2 PALEONTOLOGY

Geobios

Pub Date : 2024-10-01 DOI: 10.1016/j.geobios.2024.06.001

Sampa Kundu, Mahasin Ali Khan

A new fossil epifoliar ascomycete (Ascomycota), Meliolinites miocenicus nov. sp. (fossil Meliolaceae), occurs in situ on a compressed monocot leaf from middle Siwalik (Late Miocene, ca. 12–8 Ma) sediments of Himachal Pradesh, Western Himalaya. The fossil consists of a well-preserved mycelium of superficial, brown to dark brown, septate, thick-walled, branched hyphodiate hyphae; a sub-globose, dark brown putative ascoma, and an oblong to broadly cylindrical, five-celled, four-septate, mature germinating ascospore. The new fossil differs from earlier reported melioloid fossils primarily in the morphology of appressoria. Meliolinites miocenicus nov. sp. on its host is evidence of the existence of a biotrophic relationship at the time of deposition. Qualitative climate data using plant megafossils recovered from the same fossil locality indicate that M. miocenicus nov. sp. and its host thrived in a warm and humid tropical environment.

一种新的附生子囊菌（Ascomycota）化石 Meliolinites miocenicus nov.sp.（化石 Meliolaceae）就地出现在西喜马拉雅山脉喜马偕尔邦中斯瓦利克（中新世晚期，约 12-8 Ma）沉积物的一片压缩单子叶上。该化石由保存完好的表层棕色至深棕色、有隔膜、厚壁、分枝的菌丝组成；一个近球形、深棕色的假伞房，以及一个长圆形至宽圆柱形、五室、四隔膜、成熟发芽的子囊孢子。新化石与早先报道的褐藻化石的不同之处主要体现在附属器的形态上。寄主上的 Meliolinites miocenicus nov.sp.是沉积时存在生物营养关系的证据。利用在同一化石地点发现的植物巨型化石得出的定性气候数据表明，M. miocenicus nov. sp.及其宿主在温暖潮湿的热带环境中繁衍生息。

引用次数: 0

Updating the fauna and age of the Neogene-Quaternary large mammal sites of Greece 更新希腊新近纪-第四纪大型哺乳动物遗址的动物群和年龄

IF 1.6 4区地球科学 Q2 PALEONTOLOGY

Geobios

Pub Date : 2024-08-01 DOI: 10.1016/j.geobios.2023.12.010

George D. Koufos

The Neogene-Quaternary continental deposits cover large areas of Greece and several fossil mammal sites have been discovered in the country. There are several collections of large fossil mammals for this time span, which provide important data for the fauna biochronology, correlations, palaeoecology and palaeogeography of the area. The last lists with the fauna, age and biochronology of the Greek large mammal localities were given in 2006 for the Neogene and in 2001 for the Quaternary. Extensive research over the last twenty years provided several new localities, and many data and information were published. Therefore, an updating of the lists was more than necessary, and the present article deals with it; it covers the time span untill June 2023. Lists include all faunal information as the systematic classification, chronology, biostratigraphic correlation of the faunas, and main bibliography. It is worth mentioning that some of the Greek localities are key-localities for the Eastern Mediterranean region, e.g., Pikermi, Axios Valley, Villafranchian collection. These faunas are important for the comparison and identification of new collections, correlations, palaeoecology, and palaeogeography of Neogene European mammals.

新近纪-第四纪大陆沉积覆盖了希腊的大片地区，在希腊发现了多个哺乳动物化石遗址。在这一时间跨度内，有多个大型哺乳动物化石群，为该地区的动物群生物年代学、相关性、古生态学和古地理学提供了重要数据。希腊大型哺乳动物化石地点的动物群、年龄和生物年代学的最新清单分别于 2006 年和 2001 年发布，前者涉及新近纪，后者涉及第四纪。过去二十年的广泛研究提供了一些新的地点，并公布了许多数据和信息。因此，对清单进行更新是非常必要的，本文就涉及到这一点；它涵盖的时间跨度一直到 2023 年 6 月。列表包括所有动物信息，如系统分类、年代学、动物群的生物地层学关联以及主要参考书目。值得一提的是，希腊的一些地点是东地中海地区的关键地点，如皮克米、阿克索斯山谷、维拉弗朗西集合地。这些动物群对于新近纪欧洲哺乳动物新采集品的比较和鉴定、相关性、古生态学和古地理学都非常重要。

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引用次数: 0

The euphyllophytes of a new Givetian plant assemblage from the eastern Anti-Atlas, Morocco 摩洛哥安特阿特拉斯（Anti-Atlas）东部的一个新的给地植物群落的 euphyllophytes

IF 1.6 4区地球科学 Q2 PALEONTOLOGY

Geobios

Pub Date : 2024-08-01 DOI: 10.1016/j.geobios.2023.12.008

Brigitte Meyer-Berthaud , Candys Bert , Anne-Laure Decombeix , Marion Lacand , Merlin Ramel , Ralph Thomas Becker , Christian Klug , Ahmed El Hassani , Abdelfatah Tahiri

The Middle Devonian is a transitional period for the first vascular plants, which acquire modern vegetative and reproductive structures, diversify considerably and, within the euphyllophytes, evolve the first representatives of modern plant groups, the monilophytes and lignophytes. However, the dynamics of this diversification across the different paleocontinents remains obscure, particularly within Gondwana. The upper Givetian locality of Oum el Jerane, in southeastern Morocco, has yielded a new assemblage of anatomically preserved plant remains whose description contributes to a better understanding of the floras of the northern margin of Gondwana during the Middle Devonian. The euphyllophytes include one iridopterid, Arachnoxylon minor, two cladoxylopsids, one of which represents the new genus Jerana, and two aneurophytales affiliated with the genus Triloboxylon. The cladoxylopsid remains from Oum el Jerane correspond to relatively small plants compared to the well-known coeval cladoxylopsids of Laurussia. Compared to the taxonomic composition of the four phytochoria recently defined for the Middle Devonian, the Oum el Jerane plant assemblage corresponds to the ‘subtropical’ phytochorion, which is close to the ‘Laurussia’ phytochorion, but which would correspond to drier environmental conditions.

中泥盆世是第一批维管束植物的过渡时期，这些植物获得了现代的无性和生殖结构，发生了很大的多样化，并在裸子植物中演化出现代植物类群的第一批代表--单叶植物和木质植物。然而，这种多样性在不同古大陆上的动态变化仍不明显，尤其是在冈瓦纳地区。摩洛哥东南部的乌姆杰拉内（Oum el Jerane）上古生代地点发现了一批新的解剖保存植物遗骸，对它们的描述有助于更好地了解中泥盆纪冈瓦纳北缘的植物群。这些叶状植物包括一种鸢尾科植物（Arachnoxylon minor）、两种蝶形花植物（其中一种代表新属Jerana）和两种隶属于Triloboxylon属的蝶形花植物。与众所周知的同时期的劳鲁西亚(Laurussia)cladoxylopsids相比，乌姆杰拉内(Oum el Jerane)的cladoxylopsid遗骸属于相对较小的植物。与最近为中泥盆纪定义的四种植物群的分类组成相比，乌姆杰拉内植物群属于 "亚热带 "植物群，与 "劳鲁西亚 "植物群接近，但与更干旱的环境条件相对应。

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引用次数: 0