Pub Date : 2023-03-31DOI: 10.3140/bull.geosci.1866
{"title":"Lower Tremadocian (Ordovician) lingulate brachiopods from the Central Andean Basin (NW Argentina) and their biogeographical links","authors":"","doi":"10.3140/bull.geosci.1866","DOIUrl":"https://doi.org/10.3140/bull.geosci.1866","url":null,"abstract":"","PeriodicalId":9332,"journal":{"name":"Bulletin of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49661426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-31DOI: 10.3140/bull.geosci.1861
Carolin Haug, Ana Zippel, C. Hassenbach, T., Haug, JoaCHim
In larvae of lacewings (Neuroptera), each mandible is conjoined with its corresponding maxilla (upper and lower jaws) forming a stylet. Stylets are specialized for piercing, liquefying and sucking the tissues of their prey. The shape, length and thickness of the stylets can differ immensely among larvae of different in-groups of Neuroptera. In addition, the stylets may possess a single tooth or multiple teeth of various sizes and positions, or may totally lack teeth. The larvae of split-footed lacewings (Nymphidae) are often characterized by a single tooth on each stylet and a relatively wide head capsule. The tooth in known larvae is arranged in the plane of movement of the stylet itself, as also often seen in other lacewing larvae. Here we describe and analyse a new type of fossil representatives of Nymphidae from about 100-million-year-old Kachin Myanmar amber. The new fossil type has a special morphology with prominent lateral processes on the head capsule and a single prominent tooth per stylet. The fossil type differs from all the other known larvae of Nymphidae by the arrangement of the tooth: it extends outside of the plane of movement of the stylets. Similar arrangements of teeth or spines outside of the plane of movement also occur in some raptorial appendages of other representatives of Euarthropoda, where they form a grasping basket. We discuss the implications of this unusual fossil type, concerning its functional morphology and ecology. •
{"title":"A split-footed lacewing larva from about 100-million-year-old amber indicates a now extinct hunting strategy for neuropterans","authors":"Carolin Haug, Ana Zippel, C. Hassenbach, T., Haug, JoaCHim","doi":"10.3140/bull.geosci.1861","DOIUrl":"https://doi.org/10.3140/bull.geosci.1861","url":null,"abstract":"In larvae of lacewings (Neuroptera), each mandible is conjoined with its corresponding maxilla (upper and lower jaws) forming a stylet. Stylets are specialized for piercing, liquefying and sucking the tissues of their prey. The shape, length and thickness of the stylets can differ immensely among larvae of different in-groups of Neuroptera. In addition, the stylets may possess a single tooth or multiple teeth of various sizes and positions, or may totally lack teeth. The larvae of split-footed lacewings (Nymphidae) are often characterized by a single tooth on each stylet and a relatively wide head capsule. The tooth in known larvae is arranged in the plane of movement of the stylet itself, as also often seen in other lacewing larvae. Here we describe and analyse a new type of fossil representatives of Nymphidae from about 100-million-year-old Kachin Myanmar amber. The new fossil type has a special morphology with prominent lateral processes on the head capsule and a single prominent tooth per stylet. The fossil type differs from all the other known larvae of Nymphidae by the arrangement of the tooth: it extends outside of the plane of movement of the stylets. Similar arrangements of teeth or spines outside of the plane of movement also occur in some raptorial appendages of other representatives of Euarthropoda, where they form a grasping basket. We discuss the implications of this unusual fossil type, concerning its functional morphology and ecology. •","PeriodicalId":9332,"journal":{"name":"Bulletin of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46681547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-31DOI: 10.3140/bull.geosci.1865
J. S. Peel
A single phosphatised specimen from the middle Cambrian Henson Gletscher Formation (Miaolingian Series, Wuliuan Stage) of North Greenland is interpreted as the hatching larva of a totalgroup priapulid worm. A plated lorica is not present but probably was developed at a later larval stage, by comparison with the described development of extant Priapulus caudatus and Halicryptus spinulosus . A characteristic priapulid introvert with scalids is not seen but it was likely withdrawn in the available specimen. The new find is consistent with a similar ontogeny in Cambrian priapulid cycloneuralians to that seen in their present day relatives. New
{"title":"A priapulid larva from the middle Cambrian (Wuliuan Stage) of North Greenland (Laurentia)","authors":"J. S. Peel","doi":"10.3140/bull.geosci.1865","DOIUrl":"https://doi.org/10.3140/bull.geosci.1865","url":null,"abstract":"A single phosphatised specimen from the middle Cambrian Henson Gletscher Formation (Miaolingian Series, Wuliuan Stage) of North Greenland is interpreted as the hatching larva of a totalgroup priapulid worm. A plated lorica is not present but probably was developed at a later larval stage, by comparison with the described development of extant Priapulus caudatus and Halicryptus spinulosus . A characteristic priapulid introvert with scalids is not seen but it was likely withdrawn in the available specimen. The new find is consistent with a similar ontogeny in Cambrian priapulid cycloneuralians to that seen in their present day relatives. New","PeriodicalId":9332,"journal":{"name":"Bulletin of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45915802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-31DOI: 10.3140/bull.geosci.1868
D. Holloway, M. R. Banks, D. M. Banks
Thirteen species of trilobites are described from two different faunas in late Katian and Rhuddanian strata respectively of the Arndell Sandstone in the Florentine Valley of southern Tasmania. The late Katian fauna includes the trinucleid Auritolithus corbetti gen. et sp. nov., the calymenids Salterocoryphe ? bailliei sp. nov. and Vietnamia hyron sp. nov., and limited material of the lichid Amphilichas ? and two indeterminate asaphids. Auritolithus , characterized by the markedly subpentagonal outline of the cephalon, cannot be assigned to any of the existing trinucleid subfamilies but seems closely related to forms occurring in the Upper Ordovician of the Precordillera Basin of Argentina. Salterocoryphe ? bailliei , the first record of a member of the Colpocoryphinae from Australia, is considerably younger stratigraphically than other occurrences of that genus in the middle to upper Darriwilian of France and the Iberian Peninsula. The Rhuddanian fauna from the Arndell Sandstone includes the illaenid Pepodes agrestis gen. et sp. nov., the scutelluid Japonoscutellum senectum sp. nov., the brachymetopid Niuchangella agastor sp. nov., the encrinurids Arndellaspis oryxis gen. et sp. nov. and Cromus ?, the calymenid Gravicalymene clarkei sp. nov. and the homalonotid Brongniartella calveri sp. nov. Niuchangella is accepted as a senior synonym of Radnoria . Arndellaspis is not closely related to other members of the Encrinurinae from Australia but shares unique derived characters of the pygidium with Encrinurus ( s.s. ) and Wallacia , occurring in Laurentia, Avalonia and Baltica, and Arndellaspis may share common ancestry with Encrinurus . The commonly broadly interpreted Gravicalymene is revised and restricted to a smaller number of closely related species from the Darriwilian to middle Telychian. The faunal affinities of the trilobites suggest links with terranes that lay along the north-western margin of Gondwana and with South America in the Late Ordovician, and with South China and possibly Laurentia in the early Silurian.
在塔斯马尼亚南部佛罗伦斯河谷的Arndell砂岩中，分别在Katian晚期和rhodanian地层中发现了13种三叶虫。晚卡天动物群包括三核Auritolithus corbetti gen. et sp. nov.， calymenids Salterocoryphe ?越南海龙(hyron sp. nov.)，以及地衣Amphilichas ?还有两个不确定的蚜虫。Auritolithus的特征是头部明显的近五边形轮廓，不能归属于任何现有的三核亚科，但似乎与阿根廷Precordillera盆地上奥陶统的形态密切相关。Salterocoryphe吗?来自澳大利亚的Colpocoryphinae成员的第一个记录bailliei，在地层学上比法国Darriwilian中上和伊比利亚半岛的该属其他发现要年轻得多。在安德尔砂岩中发现的吕达尼动物群包括:蛭形目Pepodes agrestis gen. et sp. nov.，蹼形目Japonoscutellum senectum sp. nov.，短形目Niuchangella agastor sp. nov.，粪形目Arndellaspis oryxis gen. et sp. 11 .和Cromus ?，萼形目Gravicalymene clarkei sp. 11 .和同形目Brongniartella calveri sp. 11 . Niuchangella被认为是Radnoria的高级同属。Arndellaspis与澳大利亚的Encrinurinae的其他成员关系并不密切，但与Encrinurus (s.s.)具有独特的pygidium衍生特征。和Wallacia，发生在Laurentia, Avalonia和Baltica，以及Arndellaspis可能与Encrinurus有共同的祖先。通常被广泛解释的Gravicalymene被修订并限制为从Darriwilian到中期Telychian的少数密切相关的物种。三叶虫的动物群相似性表明，它们与冈瓦纳大陆西北边缘的地体有关，与晚奥陶世的南美洲有关，与志留纪早期的华南地区有关，也可能与劳伦西亚地区有关。
{"title":"Late Ordovician and early Silurian trilobites from Tasmania","authors":"D. Holloway, M. R. Banks, D. M. Banks","doi":"10.3140/bull.geosci.1868","DOIUrl":"https://doi.org/10.3140/bull.geosci.1868","url":null,"abstract":"Thirteen species of trilobites are described from two different faunas in late Katian and Rhuddanian strata respectively of the Arndell Sandstone in the Florentine Valley of southern Tasmania. The late Katian fauna includes the trinucleid Auritolithus corbetti gen. et sp. nov., the calymenids Salterocoryphe ? bailliei sp. nov. and Vietnamia hyron sp. nov., and limited material of the lichid Amphilichas ? and two indeterminate asaphids. Auritolithus , characterized by the markedly subpentagonal outline of the cephalon, cannot be assigned to any of the existing trinucleid subfamilies but seems closely related to forms occurring in the Upper Ordovician of the Precordillera Basin of Argentina. Salterocoryphe ? bailliei , the first record of a member of the Colpocoryphinae from Australia, is considerably younger stratigraphically than other occurrences of that genus in the middle to upper Darriwilian of France and the Iberian Peninsula. The Rhuddanian fauna from the Arndell Sandstone includes the illaenid Pepodes agrestis gen. et sp. nov., the scutelluid Japonoscutellum senectum sp. nov., the brachymetopid Niuchangella agastor sp. nov., the encrinurids Arndellaspis oryxis gen. et sp. nov. and Cromus ?, the calymenid Gravicalymene clarkei sp. nov. and the homalonotid Brongniartella calveri sp. nov. Niuchangella is accepted as a senior synonym of Radnoria . Arndellaspis is not closely related to other members of the Encrinurinae from Australia but shares unique derived characters of the pygidium with Encrinurus ( s.s. ) and Wallacia , occurring in Laurentia, Avalonia and Baltica, and Arndellaspis may share common ancestry with Encrinurus . The commonly broadly interpreted Gravicalymene is revised and restricted to a smaller number of closely related species from the Darriwilian to middle Telychian. The faunal affinities of the trilobites suggest links with terranes that lay along the north-western margin of Gondwana and with South America in the Late Ordovician, and with South China and possibly Laurentia in the early Silurian.","PeriodicalId":9332,"journal":{"name":"Bulletin of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42704564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-31DOI: 10.3140/bull.geosci.1830
M. Ghobadi Pour, L. Popov, J. Álvaro, A. Amini, V. Hairapetian, H. Jahangir
t ains was established in 1934, when Bobek collected trilobites at AlamKuh (Fig. 1), which were subsequently identified by Dietrich (1937). They were only documented in more detail thirty years later, when Gansser & Huber (1962) introduced the fossiliferous Lashkarak Formation, named after its homonymous mountain. Davies et al. (1972) and Clark et al. (1975) also reported the presence of Ordovician fossiliferous strata in the Talesh Mountains, southwest of Rasht city (Fig. 1). Their Late Ordovician age was supported by a rich trilobite fauna subsequently described by Karim (2009). There was little progress in Ordovician studies for the next forty years. The information on the Ordovician and the stratigraphical ranges of the fossil content in the Alborz Mountains by Stöcklin & Setudehnia (1991), Hamedi et al. (1997) and Bruton et al. (2004) was im precise. Significant confusion arose after re-definition of
它建立于1934年，当时Bobek在Alam-Kuh收集三叶虫(图1)，随后由Dietrich(1937)鉴定。直到30年后，当Gansser & Huber(1962)介绍了以同名山脉命名的拉什卡拉克地层化石时，它们才被更详细地记录下来。Davies et al.(1972)和Clark et al.(1975)也报道了Rasht市西南Talesh山脉存在奥陶系化石地层(图1)。Karim(2009)随后描述了丰富的三叶虫动物群，支持了它们的晚奥陶世时代。在接下来的四十年里，奥陶纪的研究几乎没有进展。Stöcklin & Setudehnia(1991)、Hamedi et al.(1997)和Bruton et al.(2004)对奥尔布尔斯山脉奥陶纪和化石含量的地层范围的信息不精确。的重新定义后产生了重大的混乱
{"title":"Ordovician of North Iran: New lithostratigraphy, palaeogeography and biogeographical links with South China and the Mediterranean peri-Gondwana margin","authors":"M. Ghobadi Pour, L. Popov, J. Álvaro, A. Amini, V. Hairapetian, H. Jahangir","doi":"10.3140/bull.geosci.1830","DOIUrl":"https://doi.org/10.3140/bull.geosci.1830","url":null,"abstract":"t ains was established in 1934, when Bobek collected trilobites at AlamKuh (Fig. 1), which were subsequently identified by Dietrich (1937). They were only documented in more detail thirty years later, when Gansser & Huber (1962) introduced the fossiliferous Lashkarak Formation, named after its homonymous mountain. Davies et al. (1972) and Clark et al. (1975) also reported the presence of Ordovician fossiliferous strata in the Talesh Mountains, southwest of Rasht city (Fig. 1). Their Late Ordovician age was supported by a rich trilobite fauna subsequently described by Karim (2009). There was little progress in Ordovician studies for the next forty years. The information on the Ordovician and the stratigraphical ranges of the fossil content in the Alborz Mountains by Stöcklin & Setudehnia (1991), Hamedi et al. (1997) and Bruton et al. (2004) was im precise. Significant confusion arose after re-definition of","PeriodicalId":9332,"journal":{"name":"Bulletin of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44615958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-03DOI: 10.3140/bull.geosci.1831
J. Bek, P. Štorch, P. Tonarová, M. Libertín
Dispersed spores, cryptospores, scolecodonts, acritarchs, prasinophytes and chitinozoans, dated by graptolites as being middle Sheinwoodian (early Wenlock, ca 432 Ma), are described from the Loděnice-Špičatý vrch locality, Prague Basin, Czech Republic. Palynomorphs were macerated from a specimen (stored in the National Museum, Prague), with fragments of Cooksonia sp. and the zonal index graptolite Monograptus belophorus giving precise stratigraphic position within Monograptus belophorus Biozone. Important is the oldest occurrence of monolete spores. The number of spore taxa indicate that minimally six types of early vascular plants and probably two to three types of cryptosporophytes grew on the Svatý Jan V olcanic Island in the Prague Basin. The ecology of the first cryptospore and trilete spore producers within Sheinwoodian–Přídolí interval is discussed with special focus on first two globally important key events (after Homerian glaciation and during Přídolí) for earliest vascular land plants. The combination of palynological and palaeobotanical records confirms important role of volcanic islands of the Prague Basin for the evolution of early land plants.
分散孢子、隐孢子、scolecodonts、acritachs、prasinophytes和chitinozoans，由笔石确定年代为中Sheinwood阶（早Wenlock，约432 Ma），来自捷克共和国布拉格盆地的LodŞnice-Špičatývrch地区。Palynomorphs是从一个标本（保存在布拉格国家博物馆）中提取的，其中包括Cooksonia sp.的碎片和带指数笔石Monograptus belophorus，在Monograpus belophors生物带内提供了精确的地层位置。重要的是最古老的单裂缝孢子。孢子分类群的数量表明，布拉格盆地的SvatýJan V olcanic岛上生长着至少六种类型的早期维管植物，可能还有两到三种类型的隐孢子体。讨论了Sheinwoodian–Přídolí间隔内第一个隐孢子和三裂孢子生产者的生态学，特别关注最早维管陆生植物的前两个全球重要关键事件（荷马冰川作用后和Přódoló期间）。孢粉学和古植物学记录的结合证实了布拉格盆地火山岛在早期陆地植物进化中的重要作用。
{"title":"Early Silurian (mid-Sheinwoodian) palynomorphs from the Loděnice-Špičatý vrch, Prague Basin, Czech Republic","authors":"J. Bek, P. Štorch, P. Tonarová, M. Libertín","doi":"10.3140/bull.geosci.1831","DOIUrl":"https://doi.org/10.3140/bull.geosci.1831","url":null,"abstract":"Dispersed spores, cryptospores, scolecodonts, acritarchs, prasinophytes and chitinozoans, dated by graptolites as being middle Sheinwoodian (early Wenlock, ca 432 Ma), are described from the Loděnice-Špičatý vrch locality, Prague Basin, Czech Republic. Palynomorphs were macerated from a specimen (stored in the National Museum, Prague), with fragments of Cooksonia sp. and the zonal index graptolite Monograptus belophorus giving precise stratigraphic position within Monograptus belophorus Biozone. Important is the oldest occurrence of monolete spores. The number of spore taxa indicate that minimally six types of early vascular plants and probably two to three types of cryptosporophytes grew on the Svatý Jan V olcanic Island in the Prague Basin. The ecology of the first cryptospore and trilete spore producers within Sheinwoodian–Přídolí interval is discussed with special focus on first two globally important key events (after Homerian glaciation and during Přídolí) for earliest vascular land plants. The combination of palynological and palaeobotanical records confirms important role of volcanic islands of the Prague Basin for the evolution of early land plants.","PeriodicalId":9332,"journal":{"name":"Bulletin of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47445119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-31DOI: 10.3140/bull.geosci.1847
Farzad Poursalehi, Gustavo, G., voldman, Ali Bahrami, M. J. Salas
Ordovician marine sedimentary sequences occur in several widely separated structural blocks in Iran, along the northern margin of Gondwana. In northern Kerman Province, the Ordovician sedimentary interval is known as the Katkoyeh Formation, which encompasses ~ 70–300 m of siliciclastic rocks with scarce carbonate and thick pyroclastic beds in its upper part. Previous studies provided several ages for the Katkoyeh Formation, puzzled by the limited number of palaeontological studies, mostly based on spot samples, the presence of regional important stratigraphic gaps, and the inherent structural complexity of the area. In order to adjust the depositional time of the Katkoyeh Formation, a systematic sampling for microfossils was conducted in the Banestan Section, located about 12 km northwest of the city of Zarand, in the vicinity of the Banestan village. Based on the occurrence of important biostratigraphic species, we recorded three conodont intervals in ascending order in the Katkoyeh Formation, namely the Rossodus manitouensis/ Paltodus deltifer Concurrent Range Zone (Tremadocian, Lower Ordovician), the Juanognathus variabilis Range Zone (Floian, Lower Ordovician), and the Icriodella superba Range Zone (Katian–?Hirnantian, Upper Ordovician). The conodont biostratigraphy is discussed and analysed, improving the Ordovician intrabasinal correlation of Iran as well as correlation with distant palaeobiogeographic domains. The Upper Ordovician conodont assemblage is accompanied by two new species of ostracods: Satiellina zarandensis sp. nov. and Ceratopsis persicus sp. nov., both suggesting palaeobiogeographical affinities mainly with Gondwana and peri-Gondwanan regions. •
奥陶系海相沉积层序分布在伊朗冈瓦纳北缘几个相距较远的构造块体中。在Kerman省北部，奥陶系沉积层段被称为Katkoyeh组，该层段包括~ 70 ~ 300 m的硅质碎屑岩，上部碳酸盐稀缺，火山碎屑层厚。以前的研究提供了Katkoyeh组的几个年龄，但由于古生物学研究数量有限，主要基于现场样本，区域重要地层间隙的存在以及该地区固有结构的复杂性，这些研究令人困惑。为了调整Katkoyeh组的沉积时间，在Banestan剖面进行了系统的微化石采样，该剖面位于Zarand市西北约12公里处，位于Banestan村附近。根据重要生物地层物种的产状，我们在Katkoyeh组记录了3个牙形刺层序，即Rossodus manitouensis/ Paltodus deltifer Concurrent Range Zone (Tremadocian，下奥陶统)、Juanognathus variabilis Range Zone (Floian，下奥陶统)和Icriodella superba Range Zone (Katian - ?Hirnantian，上奥陶统)。对牙形石生物地层学进行了讨论和分析，提高了伊朗奥陶系基底内对比以及与遥远古地理域的对比。上奥陶统牙形石组合中还发现了两种新的甲壳类动物:Satiellina zarandensis sp. nov和Ceratopsis persicus sp. nov，这两种甲壳类动物在古地理上主要与冈瓦纳和冈瓦纳周边地区有亲缘关系。•
{"title":"New data on conodonts and ostracods of the Katkoyeh Formation (Lower-Upper Ordovician) at the Banestan Section of East-Central Iran: biostratigraphical and palaeobiogeographical significance","authors":"Farzad Poursalehi, Gustavo, G., voldman, Ali Bahrami, M. J. Salas","doi":"10.3140/bull.geosci.1847","DOIUrl":"https://doi.org/10.3140/bull.geosci.1847","url":null,"abstract":"Ordovician marine sedimentary sequences occur in several widely separated structural blocks in Iran, along the northern margin of Gondwana. In northern Kerman Province, the Ordovician sedimentary interval is known as the Katkoyeh Formation, which encompasses ~ 70–300 m of siliciclastic rocks with scarce carbonate and thick pyroclastic beds in its upper part. Previous studies provided several ages for the Katkoyeh Formation, puzzled by the limited number of palaeontological studies, mostly based on spot samples, the presence of regional important stratigraphic gaps, and the inherent structural complexity of the area. In order to adjust the depositional time of the Katkoyeh Formation, a systematic sampling for microfossils was conducted in the Banestan Section, located about 12 km northwest of the city of Zarand, in the vicinity of the Banestan village. Based on the occurrence of important biostratigraphic species, we recorded three conodont intervals in ascending order in the Katkoyeh Formation, namely the Rossodus manitouensis/ Paltodus deltifer Concurrent Range Zone (Tremadocian, Lower Ordovician), the Juanognathus variabilis Range Zone (Floian, Lower Ordovician), and the Icriodella superba Range Zone (Katian–?Hirnantian, Upper Ordovician). The conodont biostratigraphy is discussed and analysed, improving the Ordovician intrabasinal correlation of Iran as well as correlation with distant palaeobiogeographic domains. The Upper Ordovician conodont assemblage is accompanied by two new species of ostracods: Satiellina zarandensis sp. nov. and Ceratopsis persicus sp. nov., both suggesting palaeobiogeographical affinities mainly with Gondwana and peri-Gondwanan regions. •","PeriodicalId":9332,"journal":{"name":"Bulletin of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44759083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-31DOI: 10.3140/bull.geosci.1852
L. Collantes, E. Mayoral, E. Liñán, R. Gozalo, S. Pereira
{"title":"The trilobite Serrodiscus Richter & Richter from Iberia, with systematic review of the genus and its international correlation through the Cambrian Series 2.","authors":"L. Collantes, E. Mayoral, E. Liñán, R. Gozalo, S. Pereira","doi":"10.3140/bull.geosci.1852","DOIUrl":"https://doi.org/10.3140/bull.geosci.1852","url":null,"abstract":"","PeriodicalId":9332,"journal":{"name":"Bulletin of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47172566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-24DOI: 10.3140/bull.geosci.1858
J. Foster, S. Sroka, T. Howells, H. Cothren, C. Dehler, J. Hagadorn
{"title":"New Cambrian vermiform organisms from Burgess Shale-type deposits of the western United States","authors":"J. Foster, S. Sroka, T. Howells, H. Cothren, C. Dehler, J. Hagadorn","doi":"10.3140/bull.geosci.1858","DOIUrl":"https://doi.org/10.3140/bull.geosci.1858","url":null,"abstract":"","PeriodicalId":9332,"journal":{"name":"Bulletin of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47233145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-17DOI: 10.3140/bull.geosci.1850
F. Siegel, F. Wiese, K. Klug
{"title":"Middle Anisian (Bithynian to Illyrian?, Middle Triassic) Ammonoidea from Rüdersdorf (Brandenburg, Germany) with a revision of Beneckeia Mojsisovics, 1882 and notes on migratory pathways","authors":"F. Siegel, F. Wiese, K. Klug","doi":"10.3140/bull.geosci.1850","DOIUrl":"https://doi.org/10.3140/bull.geosci.1850","url":null,"abstract":"","PeriodicalId":9332,"journal":{"name":"Bulletin of Geosciences","volume":"1 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41972789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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