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Labechiid stromatoporoids from the Middle Ordovician Machiakou Formation of North China and their implications for the early development of stromatoporoids 华北中奥陶统马基雅口组Labechiid叠孔虫及其对叠孔虫早期发育的意义
Pub Date : 2022-10-02 DOI: 10.1080/03115518.2022.2130978
J. Jeon, Qijian Li, Zhongyang Chen, Kun Liang, S. Kershaw, Yuandong Zhang
Abstract The Darriwilian stromatoporoid assemblages of North China represent a critical stage in early stromatoporoid development across the peri-Gondwanan regions, reaching their highest generic diversity than elsewhere as part of the Great Ordovician Biodiversification Event. We describe four labechiid stromatoporoid species, Labechia variabilis Yabe & Sugiyama, 1930, Labechiella mingshankouensis (Ozaki, 1938), Thamnobeatricea suxianensis (Dong, 1982), and Sinodictyon columnare Yabe & Sugiyama, 1930 from the Middle Ordovician Machiakou Formation in the Xiaonanhai section near Anyang City in northern Henan Province of China. The conodont Plectodina onychodonta occurs in association with these labechiids, implying a middle to late Darriwilian age. This assemblage extends the stratigraphic range of early stromatoporoids in North China to as early as the middle Darriwilian, thus slightly older than the previously known late Darriwilian earliest records. Mutual encrustations of Labechia variabilis and Labechiella mingshankouensis in the present assemblage constructed a microbioherm, together with unidentified tubular organisms, Ortonella-like calcimicrobes, a tubeworm-like organism, and borings. The assemblages of the Darriwilian labechiid stromatoporoids vary from place to place palaeogeographically in the shallow epicontinental marine environment of North China, i.e., in a patchy manner. The significant diversification of Darriwilian labechiid stromatoporoids in North China was likely promoted by a combination of environmental and ecological factors, which include: (1) the occurrence of a very shallow epicontinental marine environment, (2) a possible increase in the carbonate saturation state in seawater, (3) favourable seawater temperature for stromatoporoids during the Middle Ordovician and (4) the scarcity of bryozoans and corals as ecological competitors in North China.
华北地区Darriwilian叠合孔虫组合代表了冈瓦南周边地区早期叠合孔虫发育的关键阶段,其属多样性是奥陶系生物多样性大事件的一部分。本文描述了河南省北部安阳小南海地区中奥陶世马基雅口组的labechiia variabilis Yabe & Sugiyama, 1930, Labechiella mingshankouensis (Ozaki, 1938), Thamnobeatricea suxianensis (Dong, 1982)和Sinodictyon columnare Yabe & Sugiyama, 1930。牙形刺Plectodina onychodonta与这些唇形类一起出现,表明其存在于达里威廉时代的中晚期。该组合将华北地区早期叠层孔虫的地层范围延长至达里廉中期,比先前已知的达里廉晚期最早记录略早。变异Labechia variabilis和明山口Labechiella mingshankouensis在该组合中相互结壳,与未识别的管状生物、ortonella样钙化微生物、管状蠕虫样生物和蛀虫一起构建了一个微生物群落。在华北陆表浅海环境中,darriwillian唇孔类叠孔类的组合在古地理上因地而异,即呈斑块状。华北地区Darriwilian labechiid叠孔虫的显著多样化可能是环境和生态因素共同作用的结果,其中包括:(1)极浅陆表海洋环境的出现;(2)海水中碳酸盐饱和度可能升高;(3)中奥陶世时期海水温度有利于叠孔虫生长;(4)华北地区苔藓虫和珊瑚作为生态竞争对手的缺乏。
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引用次数: 4
A tarsometatarsus from the upper Eocene Na Duong Basin—the first Palaeogene fossil bird from Vietnam 始新世上南都盆地的跗跖龙——越南第一具古近纪鸟类化石
Pub Date : 2022-10-02 DOI: 10.1080/03115518.2022.2126010
Tobias Massonne, M. Böhme, G. Mayr
Abstract Knowledge of the Palaeogene avifauna of East Asia is scarce, and only a few fossils have been described thus far. A tarsometatarsus from the upper Eocene Na Duong Basin represents the first Palaeogene fossil bird from Vietnam. The fossiliferous sediments in the Na Duong Basin originated from an aquatic ecosystem but also yielded terrestrial animal and plant remains suggesting a dense forest habitat surrounding an ancient lake. In accordance, the Na Duong Basin tarsometatarsus is compared with extant aquatic, terrestrial and arboreal bird species, but because of diagenetic compression and fragmentary preservation, it is difficult to classify the bone. Nevertheless, the specimen exhibits a distinctive morphology and is potentially referable to an endemic neognath unknown from other Palaeogene localities outside of Vietnam.
关于东亚古近纪鸟类的知识很少,迄今为止只描述了少数化石。始新世上南都盆地的tarsometatarsus是越南发现的首个古近纪鸟类化石。那昂盆地的化石沉积物起源于一个水生生态系统,但也发现了陆生动物和植物的遗骸,这表明一个古老湖泊周围有茂密的森林栖息地。据此,将Na Duong盆地跗跖骨与现存的水生、陆生和树栖鸟类进行了比较,但由于成岩压缩和碎片保存,骨分类困难。尽管如此,该标本表现出独特的形态,可能与越南以外其他古近纪地区未知的特有新鱼有关。
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引用次数: 1
New cicada fossils from Australia (Hemiptera: Cicadoidea: Cicadidae) with remarkably detailed wing surface nanostructure 澳大利亚新蝉化石(半翅目:蝉总科:蝉科),具有非常详细的翅面纳米结构
Pub Date : 2022-09-25 DOI: 10.1080/03115518.2022.2112287
M. Moulds, Michael Frese, M. McCurry
Abstract Australia hosts the richest diversity of extant cicadas in the world, but a scarcity of fossils means that little is known about their evolutionary history on the continent. Here we describe the first fossilized Cicadidae from Australia. Laopsaltria ferruginosa gen. et sp. nov., Burbungoides gulgongensis gen. et sp. nov. and Tithopsaltria titan gen. et sp. nov. were all found at McGraths Flat near Gulgong, New South Wales, a recently discovered Miocene Lagerstätte. These cicada fossils preserve remarkable detail, including setae and wing membrane surface structures. Wing size varies considerably between the three newly described species and, in T. titan sp. nov., reaches a maximum size beyond what is known from extant Australian cicadas (or any other known cicada fossil), indicating a disparate cicada fauna in Australia’s Miocene rainforests. Max Moulds [ msmoulds@gmail.com ], Australian Museum Research Institute, 1 William Street, Sydney, New South Wales 2010, Australia. Michael Frese [ michael.frese@canberra.edu.au ], Faculty of Science and Technology, University of Canberra, Bruce, Australian Capital Territory 2601, Australia; Australian Museum Research Institute, 1 William Street, Sydney, New South Wales 2010, Australia; Commonwealth Scientific and Industrial Research Organisation, Health and Biosecurity, Black Mountain, Australian Capital Territory 2601, Australia. M. R. McCurry [ matthew.mccurry@australian.museum ], Australian Museum Research Institute, 1 William Street, Sydney, New South Wales 2010, Australia; Earth and Sustainability Science Research Centre, School of BEES, The University of New South Wales, Sydney, New South Wales 2052, Australia; Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, District of Columbia 20560, USA.
澳大利亚是世界上现存蝉种类最丰富的地方,但由于化石的稀缺,人们对它们在澳大利亚大陆上的进化史知之甚少。在这里,我们描述来自澳大利亚的第一个蝉化石。Laopsaltria ferruginosa gen. et sp. nov.、Burbungoides gulgongensis gen. et sp. 11 .和Tithopsaltria titan gen. et sp. 11 .都是最近在新南威尔士州Gulgong附近的McGraths Flat发现的新发现的中新世Lagerstätte。这些蝉化石保存了很多细节,包括刚毛和翅膜表面结构。在这三种新发现的物种之间,翅膀的大小差别很大,在T. titan sp. nov.中,翅膀的最大尺寸超过了已知的现存澳大利亚蝉(或任何其他已知的蝉化石),表明澳大利亚中新世雨林中存在着一种完全不同的蝉群。马克斯·莫尔德[msmoulds@gmail.com],澳大利亚博物馆研究所,威廉街1号,悉尼,新南威尔士州,2010年,澳大利亚。Michael Frese [michael.frese@canberra.edu.au],堪培拉大学科技学院,布鲁斯,澳大利亚首都领地2601;澳大利亚博物馆研究所,威廉街1号,悉尼,新南威尔士州2010,澳大利亚;联邦科学和工业研究组织,卫生和生物安全,黑山,澳大利亚首都领地2601,澳大利亚。M. R. McCurry [matthew.mccurry@australian.museum],澳大利亚博物馆研究所,悉尼威廉街1号,新南威尔士州,2010,澳大利亚;新南威尔士大学蜜蜂学院地球与可持续发展科学研究中心,新南威尔士悉尼2052;古生物学,国家自然历史博物馆,史密森学会,华盛顿哥伦比亚特区20560,美国。
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引用次数: 3
Uppermost Triassic Halstätt-like cephalopod limestone (Lilu Facies) and Foraminifera, Timor-Leste 上三叠纪Halstätt-like头足类石灰岩(Lilu相)和有孔虫,东帝汶
Pub Date : 2022-09-11 DOI: 10.1080/03115518.2022.2112288
Isaias Santos Barros, D. Haig, E. McCartain
Abstract Ammonoid-rich wackestone beds forming a ca 2 m section between shallow-marine limestones of the Bandeira Group (Norian to possibly Rhaetian) and a wackestone–calcareous mudstone succession belonging to the Lower Jurassic Wailuli Group are recorded from the western part of Timor Leste. They are included in the Halstätt-like Lilu Facies of the Bandeira Group. Age-diagnostic involutinid foraminiferal species, not previously recorded from Timor, include Involutina liassica, Trocholina sp. ex. gr. Trocholina turris and Lamelliconus permodiscoides, which collectively indicate a Rhaetian age, possibly ranging down to the Sevatian. The conodont Norigondolella steinbergensis, recorded low in the section, is consistent with this age determination. The Lilu Facies was deposited at a water depth of a few tens of metres, as suggested by the presence of extensive cyanobacterial borings into shell fragments and the presence of microbial laminations including the presence of stromatolites and bacinellid-like fabrics. Among macrofossils, common ammonoids are present in the section, and marine reptile bones are conspicuous in the lower beds. Other biogenic components of the rock observed in acetate peels and thin sections are abundant echinoderm debris (including pentacrinoid columnal plates), bivalve fragments and micro-gastropods, rare siliceous sponge spicules, solitary corals, and brachiopod debris. In the studied region, a major drowning of a shallow-marine carbonate platform took place probably in the Rhaetian or possibly latest Norian. Similar ‘ammonitico rosso limestone’ interbedded with thick-bedded limestones of a shallow-marine carbonate platform is present in the uppermost Triassic of Seram. More detailed biostratigraphical comparisons and correlations of similar units in Timor and other nearby islands may indicate a general marine drowning of Late Triassic carbonate platforms, at least in the northern part of the East Gondwana Interior Rift system, during the Rhaetian or possibly latest Norian.
摘要在东帝汶西部,发现了Bandeira组(Norian -可能是Rhaetian)的浅海相灰岩与下侏罗统Wailuli组的灰岩-钙质泥岩序列之间约2 m的富氨泥岩层。它们包括在banddeira群的Halstätt-like Lilu相中。年龄诊断的有孔虫种类包括Involutina liassica, Trocholina sp. ex. gr. Trocholina turris和Lamelliconus permodisides,以前没有在帝汶记录过,它们共同表明一个雷蒂亚时代,可能追溯到塞瓦蒂亚。在剖面中记录较低的Norigondolella steinbergensis牙形刺与这一年龄测定一致。Lilu相沉积在几十米的水深,这表明在贝壳碎片中存在大量的蓝藻钻孔,以及微生物层状物的存在,包括叠层石和芽孢杆菌样织物的存在。在大型化石中,剖面中有常见的菊石化石,下部地层中有明显的海生爬行动物骨骼。在乙酸酯剥皮和薄片中观察到的其他生物成分包括丰富的棘皮动物碎屑(包括五烷类柱状板)、双壳类动物碎片和微型腹足类动物、罕见的硅海绵针状体、独居珊瑚和腕足类动物碎屑。在研究区域内,浅海相碳酸盐岩台地的一次大淹没可能发生在雷蒂亚期或晚诺里亚期。三叠统上三叠统与浅海相碳酸盐岩台地厚层灰岩互层发育类似的“氨质红灰岩”。更详细的生物地层学比较和东帝汶和其他附近岛屿上类似单元的对比可能表明,至少在东冈瓦纳内陆裂谷系统的北部,在雷蒂亚或可能是最新的诺里亚时期,晚三叠世碳酸盐岩台地普遍被海水淹没。
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引用次数: 0
New praeaulacid and ephialtitid hymenopterans (Apocrita) from the Middle Jurassic of northeastern China 中国东北中侏罗统前肢酸类和翅虫类膜翅目新种
Pub Date : 2022-09-07 DOI: 10.1080/03115518.2022.2112285
Longfeng Li, Peter J. M. Shih, Jingtao Yang, Chungkun Shih, D. Ren
Abstract Fossil hymenopterans incorporating two new species, Nevania deviata sp. nov. and Praeaulacon grossus sp. nov., and one new specimen of Praeaulacus scabratus referred to Praeaulacidae, together with another new species, Proapocritus habitus sp. nov., assigned to Ephialtitidae are described. These taxa were collected from outcrops of the Middle Jurassic Haifanggou Formation at Yujiagou village near Beipiao in Liaoning Province, China. We also summarize the distribution, stratigraphical range and diagnostic forewing character states of the genus Nevania to assess interspecific venational differences. Our study thus recognizes substantial diversity amongst the Middle Jurassic species of this lineage.
摘要:本文描述了膜翅目化石,包括两个新种,Nevania deviata sp. 11和Praeaulacon grossus sp. 11,以及一个新种,Proapocritus habitus sp. 11和另一个新种,隶属于叶蜂科。这些分类群采集于辽宁北漂地区虞家沟村中侏罗统海坊沟组露头。本文还总结了该属植物的分布、地层范围和诊断性特征状态,以评价其种间的物种差异。因此,我们的研究确认了这一谱系的中侏罗世物种之间存在着实质性的多样性。
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引用次数: 0
On the first dinosaur tooth reported from Australia (Theropoda: Megaraptoridae) 澳大利亚发现的第一颗恐龙牙齿(兽脚目:巨盗龙科)
Pub Date : 2022-04-03 DOI: 10.1080/03115518.2022.2071463
Jake Kotevski, Stephen F. Poropat
Abstract The first published report of a dinosaur tooth from Australia was made in 1910 by Arthur Smith Woodward, who wrote that a ‘megalosaurian’ tooth had been found at Lightning Ridge, New South Wales. However, despite the fact that this was the first dinosaur tooth found in Australia (and the only one prior to 1963), this specimen was not, and has never been, formally described. Herein, we describe this opalized theropod tooth, which almost certainly derives from the Griman Creek Formation (Upper Cretaceous; lower to mid-Cenomanian). Despite its relatively poor preservation, several morphological features are consistent with attribution to Megaraptoridae. Smith Woodward’s theropod tooth can now be recognized as one of the first megaraptorid fossils found worldwide. Furthermore, it reinforces the proposal that megaraptorids were an important component of mid-Cretaceous faunas in eastern Australia. Jake Kotevski [kotevskij2401@outlook.com.au], Biological Sciences, Evans EvoMorph Lab, Monash University, Room 226, 18 Innovation Walk, Monash University, Clayton, 3800, Australia; Stephen F. Poropat [stephenfporopat@gmail.com], Chemistry and Biotechnology, Swinburne University of Technology, John St, Hawthorn, 3122, Australia; Australian Age of Dinosaurs Museum of Natural History, Australian Age of Dinosaurs Museum of Natural History, 1 Dinosaur Drive, the Jump-Up, Winton, 4735, Australia
1910年,亚瑟·史密斯·伍德沃德(Arthur Smith Woodward)首次发表了关于澳大利亚恐龙牙齿的报告,他写道,在新南威尔士州的闪电岭(Lightning Ridge)发现了一颗“巨龙”牙齿。然而,尽管这是在澳大利亚发现的第一颗恐龙牙齿(也是1963年之前唯一的一颗),但这个标本并没有,也从来没有被正式描述过。在此,我们描述了这颗乳白色的兽脚亚目恐龙牙齿,几乎可以肯定它来自上白垩纪的Griman Creek组;下至中诺曼尼亚语)。尽管其保存相对较差,但一些形态特征与归属于大盗龙科一致。史密斯·伍德沃德的兽脚亚目恐龙牙齿现在可以被认为是世界上发现的第一批巨盗龙化石之一。此外,它还加强了巨盗龙是澳大利亚东部白垩纪中期动物群的重要组成部分的说法。Jake Kotevski [kotevskij2401@outlook.com.au],生物科学,Evans EvoMorph实验室,莫纳什大学,克莱顿,3800,澳大利亚;Stephen F. Poropat [stephenfporopat@gmail.com], Swinburne理工大学化学与生物技术,John St, Hawthorn, 3122,澳大利亚;澳大利亚恐龙时代自然历史博物馆,澳大利亚恐龙时代自然历史博物馆,1恐龙大道,跳跃,温顿,4735,澳大利亚
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引用次数: 3
New early Miocene species of the cheilostome bryozoan Microporella from the South Island of New Zealand 新西兰南岛早中新世苔藓虫微孔藻新种
Pub Date : 2022-04-03 DOI: 10.1080/03115518.2022.2084564
Mali H. Ramsfjell, P. Taylor, E. Di Martino
Abstract Since its first appearance in the early Miocene, the cheilostome bryozoan genus Microporella has been cosmopolitan, recorded from most continents. However, Miocene Microporella records in New Zealand are scarce, and currently limited to a single middle Miocene species identified as Microporella hyadesi (a Recent bifoliate erect form originally described from Cape Horn and Tierra del Fuego) from the Mt. Brown ‘E’ Limestone Formation of North Canterbury. Here, we describe and illustrate three new early Miocene (Otaian–Altonian New Zealand stages corresponding to the Aquitanian–Burdigalian) species, namely Microporella incurvata sp. nov., M. gladirostra sp. nov. and M. whiterocki sp. nov., that represent the geologically oldest regional examples of the genus to date. A fourth species is left in open nomenclature because complete ovicells are not preserved in the only recovered specimen. The colonies of Microporella were collected from several rock formations exposed in limestone quarries on the South Island. The three new species share ovicells with a personate structure, but differ in the appearance of the ooecial surface (evenly pseudoporous versus imperforate), shape of the ascopore opening (cribrate versus non-cribrate), number of oral spine bases, and shape of the avicularian rostrum and crossbar. We also illustrate for the first time ovicells of another fossil species, Microporella rusti, from the Pleistocene Nukumaru Limestone Formation of the Wanganui Basin on the North Island. The ovicells of this taxon are rare, being found in only six of several hundred specimens collected to date. The ovicells of M. rusti are also very large, covering the entire orifice of the maternal zooid, similar to those of some other Microporella species all characterized by erect bifoliate colonies contrasting with the encrusting colonies of M. rusti. http://zoobank.org/urn:lsid:zoobank.org:pub:5430969F-B75B-40E7-8F65-74CDC87AA662 Mali H. Ramsfjell [m.h.ramsfjell@nhm.uio.no] Natural History Museum, University of Oslo, Blindern, PO Box 1172, Oslo 0318, Norway; Paul D. Taylor [p.taylor@nhm.ac.uk] Department of Earth Sciences, Natural History Museum, Cromwell Road, London, SW7 5BD, UK; Emanuela Di Martino [e.d.martino@nhm.uio.no] Natural History Museum, University of Oslo, Blindern, PO Box 1172, Oslo 0318, Norway.
摘要微孔苔藓虫属自中新世早期首次出现以来,已广泛分布于各大洲。然而,新西兰中新世的微孔藻记录很少,目前仅限于一个中新世中期的物种,被确定为hyadesi微孔藻(一种最近的双叶直立形式,最初描述于合恩角和火地岛),来自北坎特伯雷的布朗' E '石灰岩地层。在这里,我们描述和说明了三个新的早中新世(otai - altonian新西兰阶段,对应于Aquitanian-Burdigalian)物种,即Microporella incurvata sp. nov., M. gladirostra sp. nov.和M. whiterocki sp. nov.,它们代表了该属迄今为止地质上最古老的区域实例。第四种是开放命名法,因为完整的卵母细胞没有保存在唯一的恢复标本。从南岛石灰岩采石场暴露的几个岩层中收集了微孔藻的菌落。这三个新种的卵母细胞都具有人偶结构,但卵特殊表面的外观(均匀的假孔与无孔)、子囊开口的形状(有孔与无孔)、口棘基部的数量以及喙和横杆的形状有所不同。我们还首次展示了来自北岛旺加努伊盆地更新世Nukumaru石灰岩组的另一种化石物种Microporella rusti的卵母细胞。这个分类群的卵母细胞很罕见,迄今为止收集的几百个标本中只有6个发现。锈菌的卵母细胞也非常大,覆盖了母类动物的整个孔,与其他一些微孔藻的卵母细胞相似,它们的特点是直立的双叶菌落,而锈菌的菌落则是外壳状的。http://zoobank.org/urn:lsid:zoobank.org:pub:5430969F-B75B-40E7-8F65-74CDC87AA662 Mali H. Ramsfjell [m.h.ramsfjell@nhm.uio.no]奥斯陆大学自然历史博物馆,布林登,邮编1172号,奥斯陆0318;Paul D. Taylor [p.taylor@nhm.ac.uk]英国伦敦克伦威尔路自然历史博物馆地球科学部;Emanuela Di Martino [e.d.martino@nhm.uio.no]奥斯陆大学自然历史博物馆,布林登,邮政信箱1172,奥斯陆0318。
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引用次数: 1
A low-diversity Peruvispira-dominated gastropod assemblage from the Permian Ratburi Group of Central Thailand 泰国中部二叠纪Ratburi群中以peruvispira为主的低多样性腹足类组合
Pub Date : 2022-04-03 DOI: 10.1080/03115518.2022.2050814
Baran Karapunar, A. Nützel, Chatchalerm Ketwetsuriya
Abstract Permian gastropods from Thailand have been extensively studied over the last few years. The earliest known fossil collection was recovered in 1967 but has never been figured or described. Here, we document this historically important gastropod assemblage excavated from the upper-Lower to Middle Permian Ratburi Group of Khao Mang Lat in the Ban Kao District of Kanchanaburi Province, Central Thailand. The material comprises approximately 200 specimens, almost all of which represent a new species, Peruvispira kanchanaburiensis sp. nov. (Goniasmatidae), together with a single individual of Orthonychia sp. (Orthonychiidae = Platyceratidae). This exceptionally low-diversity community is unusual in comparison to Permian gastropod faunas reported from elsewhere, and could reflect either a low temperature palaeoenvironmental setting or priority effects resulting from early establishment of planktotrophic larvae within the local habitat. Baran Karapunar [karapunar@snsb.de ], SNSB-Bayerische Staatssammlung für Paläontologie und Geologie, Richard-Wagner-Str. 10, 80333 München, Germany, and Department of Earth and Environmental Sciences, Paleontology & Geobiology, Ludwig-Maximilians-Universität München, Richard-Wagner-Str. 10, 80333 München, Germany; Alexander Nützel [nuetzel@snsb.de ], SNSB-Bayerische Staatssammlung für Paläontologie und Geologie, Richard-Wagner-Str. 10, 80333 München, Germany, and Department of Earth and Environmental Sciences, Paleontology & Geobiology, Ludwig-Maximilians-Universität München, Richard-Wagner-Str. 10, 80333 München, Germany, and GeoBio-Center, Ludwig-Maximilians-Universität München, Richard-Wagner-Str. 10, 80333 München, Germany; Chatchalerm Ketwetsuriya [ketwetsuriya.c@gmail.com ], Department of Earth Sciences, Faculty of Science, Kasetsart University, 10900 Bangkok, Thailand.
在过去的几年里,人们对泰国二叠纪腹足类动物进行了广泛的研究。已知最早的化石收藏于1967年被发现,但从未被描绘或描述过。在这里,我们记录了在泰国中部北碧府Ban Kao地区Khao Mang Lat的上-下-中二叠统Ratburi群中出土的具有重要历史意义的腹足类动物组合。该材料包括大约200个标本,几乎所有标本都代表一个新种,即佩佩斯皮拉kanchanaburiensis sp. 11 . (Goniasmatidae),以及一个单一的Orthonychia sp. (orthonychidae = Platyceratidae)。与其他地方报道的二叠纪腹足类动物相比,这种异常低多样性的群落是不寻常的,可能反映了低温的古环境背景或浮游营养幼虫在当地栖息地早期建立的优先效应。Baran Karapunar [karapunar@snsb.de], SNSB-Bayerische Staatssammlung f r Paläontologie;中国科学院地球与环境科学系,古生物与地球生物学系,Ludwig-Maximilians-Universität;10, 80333德国宁兴;Alexander n tzel [nuetzel@snsb.de], SNSB-Bayerische Staatssammlung f Paläontologie;中国科学院地球与环境科学系,古生物与地球生物学系,Ludwig-Maximilians-Universität;10, 80333德国m nchen, GeoBio-Center, Ludwig-Maximilians-Universität m nchen, richard wagner - str。10, 80333德国宁兴;Chatchalerm Ketwetsuriya [ketwetsuriya.c@gmail.com],泰国曼谷,泰国曼谷,泰国曼谷。
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引用次数: 1
Metaceratodus baibianorum from the La Colonia Formation: tooth plate anomalies and the possible presence of tertiary dentine 来自La Colonia组的白角兽:牙板异常和可能存在的第三系牙本质
Pub Date : 2022-04-03 DOI: 10.1080/03115518.2022.2078882
Karen M. Panzeri, N. A. Muñoz
Abstract The dentition of Mesozoic dipnoans is formed by tooth plates that are not replaced throughout their lives. These can suffer different types of lesions that may be permanent or disappear with wear through action of the jaws. Here, we describe pathologies on the tooth plates of Metaceratodus baibianorum from the Late Cretaceous (Maastrichtian) La Colonia Formation of Patagonia in Argentina. Of the total number of analysed tooth plates (N = 127), 27.5% show signs of different pathologies including caries, abscesses, hyperplasia, fractures, alterations in growth, and erosion. No tooth plates with parasitic invasions, attrition or osteopenia were observed. Some examples of occlusal caries show pulpal overgrowths on the pulp surface. CT scanning demonstrates that these are similar to tertiary dentine in their coincidence with lesions, higher density relative to the surrounding dentine, and fewer pulp canals resulting in fewer dentinal tubules. Such features may indicate that dipnoans are, or at least were, able to generate some form of reparative or reactionary dentine. Karen Magalí Panzeri [k.panzeri@fcnym.unlp.edu.ar], División Paleontología Vertebrados, Museo de La Plata, Unidades de Investigación Anexo Museo, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, Avenida 122 y 60, LA Plata, 1900, Argentina, CONICET Godoy Cruz 2290, Ciudad Autónoma de Buenos Aires, Argentina; Nahuel Antu Muñoz [nahuelmunoz@fcnym.unlp.edu.ar], División Paleontología Vertebrados, Museo de La Plata, Unidades de Investigación Anexo Museo, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, Avenida 122 y 60, LA Plata, 1900, Argentina, CONICET Godoy Cruz 2290, Ciudad Autónoma de Buenos Aires, Argentina.
摘要中生代恐龙的牙列是由终生不更换的牙板形成的。这些可能会遭受不同类型的损伤,这些损伤可能是永久性的,也可能随着颌骨的磨损而消失。本文描述了阿根廷巴塔哥尼亚晚白垩世(Maastrichtian) La Colonia组的Metaceratodus baibianorum齿板的病理特征。在分析的牙板总数(N = 127)中,27.5%显示出不同病理的迹象,包括龋齿、脓肿、增生、骨折、生长改变和侵蚀。未见牙板寄生、磨耗或骨质减少。一些牙合性龋的例子显示牙髓表面生长过度。CT扫描显示,这些与三级牙本质相似,它们与病变吻合,相对于周围牙本质密度更高,牙髓管较少,导致牙本质小管较少。这些特征可能表明,dipnoans是,或至少是,能够产生某种形式的修复性或反应性牙本质。Karen Magalí Panzeri [k.panzeri@fcnym.unlp.edu.ar], División Paleontología Vertebrados,拉普拉塔博物馆,universidades de Investigación Anexo博物馆,自然科学学院和博物馆,国立拉普拉塔大学,拉普拉塔大道122 y 60,阿根廷,拉普拉塔,1900,阿根廷,CONICET Godoy Cruz 2290,城市Autónoma布宜诺斯艾利斯;Nahuel Antu Muñoz [nahuelmunoz@fcnym.unlp.edu.ar], División Paleontología维蒂布拉多斯,拉普拉塔博物馆,大学Investigación Anexo博物馆,自然科学学院,拉普拉塔国立大学,拉普拉塔大道122 y 60,拉普拉塔,1900,阿根廷,CONICET Godoy Cruz 2290,城市Autónoma布宜诺斯艾利斯。
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引用次数: 1
New anhanguerian pterosaur remains from the Lower Cretaceous of Queensland, Australia 来自澳大利亚昆士兰下白垩纪的新翼龙残骸
Pub Date : 2022-04-03 DOI: 10.1080/03115518.2022.2065028
Adele H. Pentland, Stephen F. Poropat, Matt A. White, Samantha L. Rigby, P. Vickers-Rich, T. Rich, David A. Elliott
Abstract The Australian pterosaur assemblage currently consists of specimens recovered only from Cretaceous strata, with most of these referred to the clade Anhangueria. The majority of Australia’s pterosaur remains have been discovered in the Eromanga Basin of Queensland, specifically the upper Albian Toolebuc Formation, upper Albian Mackunda Formation, and Cenomanian–lowermost Turonian Winton Formation. In this paper, we describe two new partial pterosaur femora from the Toolebuc and Winton formations. Despite being incomplete, these specimens can be assigned to Anhangueria. Pairwise comparisons demonstrate differences in the deflection of the femoral head. Moreover, a subtle ridge on the posterior surface of the Toolebuc Formation femur is not visible on the specimen from the Winton Formation. The greater trochanter of the Winton Formation femur also preserves a potential bite mark that is tentatively attributed to a crocodylomorph. These new pterosaur fossils supplement the currently limited understanding of pterosaur diversity from Australia, and attest to the cosmopolitan distribution of anhanguerians during the Early to mid-Cretaceous. Adele H. Pentland# [pentlandadele@gmail.com], Stephen F. Poropat# [stephenfporopat@gmail.com], Matt A. White† [fossilised@hotmail.com], and Samantha L. Rigby# [samantha.rigby@hotmail.com], Australian Age of Dinosaurs Natural History Museum, The Jump-Up, Winton, Queensland 4735, Australia; Patricia Vickers-Rich* [prich@swin.edu.au], Faculty of Science, Engineering and Technology, Swinburne University of Technology, John St, Hawthorn, Victoria 3122, Australia; Thomas H. Rich [trich@museum.vic.gov.au], Museums Victoria, PO Box 666, Melbourne, Victoria 3001, Australia; David A. Elliott [david.elliott@aaod.com.au], Australian Age of Dinosaurs Natural History Museum, The Jump-Up, Winton, Queensland 4735, Australia. # Also affiliated with: School of Science, Computing and Engineering Technologies, Swinburne University of Technology, John St, Hawthorn, Victoria 3122, Australia. *School of Earth, Atmosphere and Environment, Monash University, Melbourne, Victoria 3800, Australia. †Palaeoscience Research Centre, University of New England, Armidale 2351, New South Wales, Australia.
澳大利亚的翼龙组合目前只包括从白垩纪地层中发现的标本,其中大部分属于Anhangueria分支。澳大利亚的大部分翼龙遗骸都是在昆士兰的Eromanga盆地发现的,特别是上Albian Toolebuc组、上Albian Mackunda组和cenomanian - Turonian Winton组。在本文中,我们描述了来自Toolebuc和Winton组的两个新的部分股翼龙。尽管不完整,但这些标本可归为安汉格里亚属。两两比较显示了股骨头偏转的差异。此外,在Winton组标本上看不到Toolebuc组股骨后表面的细微脊。温顿形成股骨的大转子也保留了一个潜在的咬痕,初步归因于鳄鱼形。这些新的翼龙化石补充了目前对澳大利亚翼龙多样性的有限认识,并证明了早白垩纪至中白垩纪翼龙的全球分布。Adele H. Pentland# [pentlandadele@gmail.com], Stephen F. Poropat# [stephenfporopat@gmail.com], Matt A. White†[fossilised@hotmail.com]和Samantha L. Rigby# [samantha.rigby@hotmail.com],澳大利亚恐龙时代自然历史博物馆,The jumpup, Winton, Queensland 4735,澳大利亚;Patricia Vickers-Rich* [prich@swin.edu.au],斯威本科技大学科学、工程与技术学院,澳大利亚维多利亚州3122;托马斯·h·里奇[trich@museum.vic.gov.au],维多利亚博物馆,邮政信箱666,墨尔本,维多利亚州3001,澳大利亚;David A. Elliott [david.elliott@aaod.com.au],澳大利亚恐龙时代自然历史博物馆,The jumpup, Winton, Queensland 4735,澳大利亚。附属于:科学,计算和工程技术学院,斯威本科技大学,John St, Hawthorn,维多利亚3122,澳大利亚。*莫纳什大学地球、大气与环境学院,澳大利亚维多利亚州墨尔本3800。†新英格兰大学古科学研究中心,阿米代尔2351,新南威尔士州,澳大利亚。
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引用次数: 5
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Alcheringa: An Australasian Journal of Palaeontology
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