Pub Date : 2021-03-15DOI: 10.1080/10420940.2021.1890590
Felix J. Augustin, Andreas T. Matzke, M. Maisch, H. Pfretzschner
Abstract Bioerosional trace fossils can offer invaluable insights into taphonomic processes, ecosystem dynamics and environmental conditions that are not obtainable by other lines of evidence. Here, we describe the first invertebrate trace fossils on dinosaur bone from the Upper Jurassic Shishugou Formation of the northeastern Junggar Basin. The traces occur as spherical holes in the bone, closely resembling boreholes attributed to either indeterminate insects or dermestid beetles and thus they are here likewise ascribed to feeding and/or pupation by necrophagous insects. Such bioerosional trace fossils have several taphonomical and palaeoecological implications for they are only inflicted on subaerially exposed tissues and preferentially when carcasses are desiccated. We, therefore, conclude that the dinosaur carcass was exposed for at least several weeks under a semi-arid and seasonal climate before it was buried by sediment. This supports the general palaeoclimatological and paleoenvironmental reconstructions for the Shishugou Formation from sedimentological data. Moreover, this is the first evidence for invertebrate–vertebrate interactions from the Late Jurassic of Asia, offering a novel glimpse into the diverse biotic relationships of this ancient Jurassic ecosystem.
{"title":"Dinosaur taphonomy of the Jurassic Shishugou Formation (Northern Junggar Basin, NW China) – insights from bioerosional trace fossils on bone","authors":"Felix J. Augustin, Andreas T. Matzke, M. Maisch, H. Pfretzschner","doi":"10.1080/10420940.2021.1890590","DOIUrl":"https://doi.org/10.1080/10420940.2021.1890590","url":null,"abstract":"Abstract Bioerosional trace fossils can offer invaluable insights into taphonomic processes, ecosystem dynamics and environmental conditions that are not obtainable by other lines of evidence. Here, we describe the first invertebrate trace fossils on dinosaur bone from the Upper Jurassic Shishugou Formation of the northeastern Junggar Basin. The traces occur as spherical holes in the bone, closely resembling boreholes attributed to either indeterminate insects or dermestid beetles and thus they are here likewise ascribed to feeding and/or pupation by necrophagous insects. Such bioerosional trace fossils have several taphonomical and palaeoecological implications for they are only inflicted on subaerially exposed tissues and preferentially when carcasses are desiccated. We, therefore, conclude that the dinosaur carcass was exposed for at least several weeks under a semi-arid and seasonal climate before it was buried by sediment. This supports the general palaeoclimatological and paleoenvironmental reconstructions for the Shishugou Formation from sedimentological data. Moreover, this is the first evidence for invertebrate–vertebrate interactions from the Late Jurassic of Asia, offering a novel glimpse into the diverse biotic relationships of this ancient Jurassic ecosystem.","PeriodicalId":51057,"journal":{"name":"Ichnos-An International Journal for Plant and Animal Traces","volume":"130 1","pages":"87 - 96"},"PeriodicalIF":0.8,"publicationDate":"2021-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73802841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2021-02-05DOI: 10.1080/10420940.2020.1868453
B. Singh, O. Bhargava, R. Mikuláš, Scott C. Morrison
Abstract This paper is a response to the publication by Ed Landing and Gerd Geyer (2020) which questioned several recent papers on trace fossils, depositional environments and paleogeography of the Cambro-Ordovician Upper Tal Group (Lesser Himalayan) by B.P. Singh and co-authors. However, the elaboration of Landing and Geyer contains misinformation and misquoting. Each point raised by these authors is rebutted, clarified and further elaborated.
本文是对Ed Landing和Gerd Geyer(2020)发表的论文的回应，该论文对B.P. Singh等人最近发表的关于寒武纪-奥陶系上塔尔群(小喜马拉雅)的微量化石、沉积环境和古地理的论文提出了质疑。然而，《Landing and Geyer》的阐述中存在误传和误引。这些作者提出的每一点都被反驳、澄清和进一步阐述。
{"title":"Reply to discussion on trace fossils, depositional context and paleogeography of the Upper Tal Group (upper lower Cambrian) (Lesser Himalaya) by Ed Landing and Gerd Geyer","authors":"B. Singh, O. Bhargava, R. Mikuláš, Scott C. Morrison","doi":"10.1080/10420940.2020.1868453","DOIUrl":"https://doi.org/10.1080/10420940.2020.1868453","url":null,"abstract":"Abstract This paper is a response to the publication by Ed Landing and Gerd Geyer (2020) which questioned several recent papers on trace fossils, depositional environments and paleogeography of the Cambro-Ordovician Upper Tal Group (Lesser Himalayan) by B.P. Singh and co-authors. However, the elaboration of Landing and Geyer contains misinformation and misquoting. Each point raised by these authors is rebutted, clarified and further elaborated.","PeriodicalId":51057,"journal":{"name":"Ichnos-An International Journal for Plant and Animal Traces","volume":"31 1","pages":"157 - 162"},"PeriodicalIF":0.8,"publicationDate":"2021-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77262317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2020-12-16DOI: 10.1080/10420940.2020.1843456
M. R. King, Scott E. Botterill, M. Gingras, J. Maceachern
Abstract One of the most important contributions that S. George Pemberton made to the field of ichnology was the identification that burrowed firmgrounds associated with the Glossifungites Ichnofacies, commonly demarcate important sequence stratigraphic allogenic surfaces, and more recently described autogenic surfaces. This study considers an outcrop example from the Turonian Ferron Sandstone of central Utah, wherein high and low abundance monospecific suites of Glossifungites isp. are preserved landward of marginal-marine settings, recording colonization in channels under low salinity conditions. High abundances of Glossifungites isp. are associated with sloped areas of the erosional surfaces due to environmental preference, and with clay-rich underlying lithologies owing to either substrate selection or toponomy. These suites of the Glossifungites Ichnofacies demarcate surfaces at the bases of small, stacked channels encased in coastal plain strata. Stacking suggests repeated colonization related to an autogenic process. The enclosing strata and estimated position of the shoreline indicate a more landward affinity than previously reported for the ichnogenus Glossifungites, which is normally related to erosional nearshore processes or, less commonly, to offshore submarine channel development. Glossifungites-like burrows are constructed in modern freshwater settings by subaqueous insects, such as mayfly nymphs, but the trace fossil widths reported from the Ferron Sandstone are up to one and a half times larger than these modern examples. This suggests that the described trace fossils were made by marine-recruited, brackish-water crustaceans that created similar-sized burrows, or if constructed by subaqueous insects, the tracemakers were divergent in size or body plan from known modern tracemakers.
S. George Pemberton对技术领域最重要的贡献之一是发现了与Glossifungites相相关的洞穴状地层，通常划分重要的层序地层异体面，以及最近描述的自生面。本研究考虑了犹他州中部Turonian Ferron砂岩的一个露头例子，其中高丰度和低丰度的单特异性Glossifungites套件。保存在边缘海洋环境的陆地上，记录了低盐度条件下水道的殖民。舌藻的丰度很高。由于环境偏好，它们与侵蚀表面的倾斜区域有关，并且由于基质选择或地形，它们与富含粘土的下伏岩性有关。这些绿藻岩相组在海岸平原地层中被包裹的小而堆积的水道底部划分了表面。堆积表明与自体过程相关的重复定植。封闭地层和海岸线的估计位置表明，与以前报道的相比，海藓属的Glossifungites更倾向于向陆地靠近，这通常与近岸侵蚀过程有关，或者较少与近海海底通道发育有关。在现代淡水环境中，像舌真菌一样的洞穴是由水下昆虫建造的，比如蜉蝣若虫，但从铁砂岩中报告的痕迹化石宽度比这些现代例子大1.5倍。这表明所描述的痕迹化石是由海洋中的咸水甲壳类动物创造的，它们创造了类似大小的洞穴，或者如果是由水下昆虫建造的，那么这些痕迹化石在大小或身体计划上与已知的现代痕迹化石不同。
{"title":"Freshwater to low salinity expression of Cretaceous Glossifungites-demarcated autogenic stratigraphic surfaces, central Utah","authors":"M. R. King, Scott E. Botterill, M. Gingras, J. Maceachern","doi":"10.1080/10420940.2020.1843456","DOIUrl":"https://doi.org/10.1080/10420940.2020.1843456","url":null,"abstract":"Abstract One of the most important contributions that S. George Pemberton made to the field of ichnology was the identification that burrowed firmgrounds associated with the Glossifungites Ichnofacies, commonly demarcate important sequence stratigraphic allogenic surfaces, and more recently described autogenic surfaces. This study considers an outcrop example from the Turonian Ferron Sandstone of central Utah, wherein high and low abundance monospecific suites of Glossifungites isp. are preserved landward of marginal-marine settings, recording colonization in channels under low salinity conditions. High abundances of Glossifungites isp. are associated with sloped areas of the erosional surfaces due to environmental preference, and with clay-rich underlying lithologies owing to either substrate selection or toponomy. These suites of the Glossifungites Ichnofacies demarcate surfaces at the bases of small, stacked channels encased in coastal plain strata. Stacking suggests repeated colonization related to an autogenic process. The enclosing strata and estimated position of the shoreline indicate a more landward affinity than previously reported for the ichnogenus Glossifungites, which is normally related to erosional nearshore processes or, less commonly, to offshore submarine channel development. Glossifungites-like burrows are constructed in modern freshwater settings by subaqueous insects, such as mayfly nymphs, but the trace fossil widths reported from the Ferron Sandstone are up to one and a half times larger than these modern examples. This suggests that the described trace fossils were made by marine-recruited, brackish-water crustaceans that created similar-sized burrows, or if constructed by subaqueous insects, the tracemakers were divergent in size or body plan from known modern tracemakers.","PeriodicalId":51057,"journal":{"name":"Ichnos-An International Journal for Plant and Animal Traces","volume":"19 1","pages":"1 - 10"},"PeriodicalIF":0.8,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91026921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2020-11-30DOI: 10.1080/10420940.2020.1843457
E. Landing, G. Geyer
Abstract Terminal Ediacaran–late early Cambrian deposition, faunas and passive margin evolution of the north Indian margin are recorded in the Nigali Dhar syncline succession. Restudy of the upper Tal Group (upper lower Cambrian Koti Dhaman Formation, KDF) ichnofauna from the Khud-Drabil section reduces it to 18 confidently named forms. The lower KDF (Lower Quartzite Member) Cruziana-Rusophycus assemblage is in subtidal (not intertidal) sandsheet facies. The overlying black Shale Member (SM) records trans-East Gondwanan deepening, not intertidal facies, in the Palaeolenus Zone. The SM, with low diversity Planolites-Palaeophycus assemblage, is overlain by subtidal (not intertidal) sandsheet facies of the middle KDF (Arkosic Sandstone Member, ASM) with shallow burrowers and furrowers (Gordia marina assemblage, new; Cruziana ichnofacies). KDF faunas with Cruziana and Rusophycus are similar to coeval, shallow marine associations elsewhere in Gondwana and NW Laurentia. Interpretation of a second KDF section 20 km from Khud-Drabil has confused an understanding of Lesser Himalaya geologic evolution as it claims Ordovician Cruziana species in the ASM and an angular SM–ASM unconformity caused by the Cambrian–Ordovician boundary Kurgiakh orogeny. However, upper lower Cambrian microfaunas occur in and above the ASM, while the angular SM–ASM unconformity is consistent with submarine sliding. KDF-type ichnofaunas do not show a tropical location of Avalonia, which has the distinctive lithofacies and biotas of a high-latitude continent unrelated to Gondwana.
{"title":"Trace fossils, depositional context, and paleogeography of the upper Tal Group (upper lower Cambrian), Lesser Himalaya, India: a Gondwanan succession with no affinities to the Avalonia microcontinent – discussion of paper by Singh et al. (2019)","authors":"E. Landing, G. Geyer","doi":"10.1080/10420940.2020.1843457","DOIUrl":"https://doi.org/10.1080/10420940.2020.1843457","url":null,"abstract":"Abstract Terminal Ediacaran–late early Cambrian deposition, faunas and passive margin evolution of the north Indian margin are recorded in the Nigali Dhar syncline succession. Restudy of the upper Tal Group (upper lower Cambrian Koti Dhaman Formation, KDF) ichnofauna from the Khud-Drabil section reduces it to 18 confidently named forms. The lower KDF (Lower Quartzite Member) Cruziana-Rusophycus assemblage is in subtidal (not intertidal) sandsheet facies. The overlying black Shale Member (SM) records trans-East Gondwanan deepening, not intertidal facies, in the Palaeolenus Zone. The SM, with low diversity Planolites-Palaeophycus assemblage, is overlain by subtidal (not intertidal) sandsheet facies of the middle KDF (Arkosic Sandstone Member, ASM) with shallow burrowers and furrowers (Gordia marina assemblage, new; Cruziana ichnofacies). KDF faunas with Cruziana and Rusophycus are similar to coeval, shallow marine associations elsewhere in Gondwana and NW Laurentia. Interpretation of a second KDF section 20 km from Khud-Drabil has confused an understanding of Lesser Himalaya geologic evolution as it claims Ordovician Cruziana species in the ASM and an angular SM–ASM unconformity caused by the Cambrian–Ordovician boundary Kurgiakh orogeny. However, upper lower Cambrian microfaunas occur in and above the ASM, while the angular SM–ASM unconformity is consistent with submarine sliding. KDF-type ichnofaunas do not show a tropical location of Avalonia, which has the distinctive lithofacies and biotas of a high-latitude continent unrelated to Gondwana.","PeriodicalId":51057,"journal":{"name":"Ichnos-An International Journal for Plant and Animal Traces","volume":"1 1","pages":"143 - 156"},"PeriodicalIF":0.8,"publicationDate":"2020-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86536211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2020-11-18DOI: 10.1080/10420940.2020.1843455
B. Vrenozi, A. Uchman
Abstract Considerable studies of the univoltine, common field-cricket Gryllus campestris Linnaeus, 1758, known from sunny oligotrophic grasslands and heathlands of the western Palaearctic, were previously made, but none of them has shown the characteristics of its burrows. This paper presents a neoichnological study based on a group of G. campestris that lives in and around a pasture glade in Dajti Mountain, east of the Tirana District in Albania. It includes direct observations of the burrows in the field and their casts made by means of white Portland cement. Burrows of nymphs of G. campestris were observed to be tubular, sun-facing and have only one, funnel-like entrance, simple termination and no branches. This study is the first one showing morphological features of the burrows and the burrowing activity of the common field-cricket, being a contribution to ichnology of soils. Preservation of the burrows is possible by their filling, for instance by sand during flooding. The burrows do not fit to any existing ichnotaxa.
{"title":"Burrows of the common field-cricket Gryllus campestris Linnaeus, 1758 (Orthoptera: Gryllidae) from Dajti Mountain, Albania","authors":"B. Vrenozi, A. Uchman","doi":"10.1080/10420940.2020.1843455","DOIUrl":"https://doi.org/10.1080/10420940.2020.1843455","url":null,"abstract":"Abstract Considerable studies of the univoltine, common field-cricket Gryllus campestris Linnaeus, 1758, known from sunny oligotrophic grasslands and heathlands of the western Palaearctic, were previously made, but none of them has shown the characteristics of its burrows. This paper presents a neoichnological study based on a group of G. campestris that lives in and around a pasture glade in Dajti Mountain, east of the Tirana District in Albania. It includes direct observations of the burrows in the field and their casts made by means of white Portland cement. Burrows of nymphs of G. campestris were observed to be tubular, sun-facing and have only one, funnel-like entrance, simple termination and no branches. This study is the first one showing morphological features of the burrows and the burrowing activity of the common field-cricket, being a contribution to ichnology of soils. Preservation of the burrows is possible by their filling, for instance by sand during flooding. The burrows do not fit to any existing ichnotaxa.","PeriodicalId":51057,"journal":{"name":"Ichnos-An International Journal for Plant and Animal Traces","volume":"19 1","pages":"46 - 55"},"PeriodicalIF":0.8,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90864702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2020-11-04DOI: 10.1080/10420940.2020.1840372
A. Uchman, G. Geyer
Abstract A new ichnogenus and ichnospecies, Segmentichnus mohri, is recognized in the lower Carboniferous deep-sea Culm facies deposits in the southern Germany. The trace fossil is an unusually large, horizontal, tubular burrow with primary successive branching and transverse annulation with ring-like, slightly irregular swellings, without wall, preserved in full relief in dark grey slate. Segmentichnus mohri is interpreted to be a locomotion and feeding trace (pascichnion) produced within the mud by unknown ‘worm’-like animal in a turbiditic depositional system. It belongs to the transition between the Paleodictyon and Nereites ichnosubfacies of the Nereites ichnofacies.
{"title":"Segmentichnus mohri igen. et isp. nov., a giant new trace fossil from the Culm facies (lower Carboniferous) of the Franconian Forest (Saxothuringian Belt, Germany)","authors":"A. Uchman, G. Geyer","doi":"10.1080/10420940.2020.1840372","DOIUrl":"https://doi.org/10.1080/10420940.2020.1840372","url":null,"abstract":"Abstract A new ichnogenus and ichnospecies, Segmentichnus mohri, is recognized in the lower Carboniferous deep-sea Culm facies deposits in the southern Germany. The trace fossil is an unusually large, horizontal, tubular burrow with primary successive branching and transverse annulation with ring-like, slightly irregular swellings, without wall, preserved in full relief in dark grey slate. Segmentichnus mohri is interpreted to be a locomotion and feeding trace (pascichnion) produced within the mud by unknown ‘worm’-like animal in a turbiditic depositional system. It belongs to the transition between the Paleodictyon and Nereites ichnosubfacies of the Nereites ichnofacies.","PeriodicalId":51057,"journal":{"name":"Ichnos-An International Journal for Plant and Animal Traces","volume":"65 1","pages":"12 - 23"},"PeriodicalIF":0.8,"publicationDate":"2020-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88964946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2020-11-04DOI: 10.1080/10420940.2020.1835661
Noura Lkebir, M. Masrour, A. Torices, F. Pérez‑Lorente
Abstract During a study of the Talmest ichnological site (2011–2012), where theropod and sauropod tracks were discovered, other ichnites were found that are analyzed in the present work. There are two basic types attributed to two different activities produced by the same vertebrate at the bottom of a flooded area. One type (Cubichnia) is produced by sliding on the bottom surface while the other (Praedichnia) is the result of the excavation, removal and accumulation of mud from the upper levels of the sediment. The analysis of structures and possible trace makers leads to the conclusion that the ichnites were produced by a freshwater fish, during its resting activity on the bottom and during the search for food.
{"title":"Cubichnia and Praedichnia in fossil ichnites of a flat fish from the Lower Cretaceous Talmest palaeoichnological site, Western High Atlas (Morocco)","authors":"Noura Lkebir, M. Masrour, A. Torices, F. Pérez‑Lorente","doi":"10.1080/10420940.2020.1835661","DOIUrl":"https://doi.org/10.1080/10420940.2020.1835661","url":null,"abstract":"Abstract During a study of the Talmest ichnological site (2011–2012), where theropod and sauropod tracks were discovered, other ichnites were found that are analyzed in the present work. There are two basic types attributed to two different activities produced by the same vertebrate at the bottom of a flooded area. One type (Cubichnia) is produced by sliding on the bottom surface while the other (Praedichnia) is the result of the excavation, removal and accumulation of mud from the upper levels of the sediment. The analysis of structures and possible trace makers leads to the conclusion that the ichnites were produced by a freshwater fish, during its resting activity on the bottom and during the search for food.","PeriodicalId":51057,"journal":{"name":"Ichnos-An International Journal for Plant and Animal Traces","volume":"34 1","pages":"60 - 71"},"PeriodicalIF":0.8,"publicationDate":"2020-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77453584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2020-10-31DOI: 10.1080/10420940.2020.1839897
S. Donovan
{"title":"Trace fossils","authors":"S. Donovan","doi":"10.1080/10420940.2020.1839897","DOIUrl":"https://doi.org/10.1080/10420940.2020.1839897","url":null,"abstract":"","PeriodicalId":51057,"journal":{"name":"Ichnos-An International Journal for Plant and Animal Traces","volume":"69 1","pages":"84 - 85"},"PeriodicalIF":0.8,"publicationDate":"2020-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86148258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2020-10-01DOI: 10.1080/10420940.2020.1835660
R. Metz
Abstract Fine-grained siltstones of the Late Triassic Passaic Formation, near Milford, New Jersey, has yielded the first evidence of the trace fossil Protovirgularia in the Newark Supergroup of New Jersey. Associated trace fossils include Helminthoidichnites, Lockeia, Scoyenia, Spongeliomorpha, and the reptile footprint Rhynchosauroides, representing the Scoyenia ichnofacies. Associated sedimentary structures include desiccation cracks, raindrop impressions, tool marks, and cross-bedding. The Passaic sediments were deposited under shallow water lacustrine shoreline conditions subject to periodic subaerial exposure.
{"title":"First record of the trace fossil Protovirgularia in the Passaic Formation (Late Triassic), Newark Supergroup, near Milford, New Jersey","authors":"R. Metz","doi":"10.1080/10420940.2020.1835660","DOIUrl":"https://doi.org/10.1080/10420940.2020.1835660","url":null,"abstract":"Abstract Fine-grained siltstones of the Late Triassic Passaic Formation, near Milford, New Jersey, has yielded the first evidence of the trace fossil Protovirgularia in the Newark Supergroup of New Jersey. Associated trace fossils include Helminthoidichnites, Lockeia, Scoyenia, Spongeliomorpha, and the reptile footprint Rhynchosauroides, representing the Scoyenia ichnofacies. Associated sedimentary structures include desiccation cracks, raindrop impressions, tool marks, and cross-bedding. The Passaic sediments were deposited under shallow water lacustrine shoreline conditions subject to periodic subaerial exposure.","PeriodicalId":51057,"journal":{"name":"Ichnos-An International Journal for Plant and Animal Traces","volume":"28 1","pages":"428 - 432"},"PeriodicalIF":0.8,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78897302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2020-07-15DOI: 10.1080/10420940.2020.1784157
Dean Meek, B. Eglington, L. Buatois, M. Mángano
Abstract The design of a relational database for ichnological data is presented to illustrate and address deficiencies in present-day palaeontological databases. Currently, palaeontology databases apply concepts and terminology derived from the study of body fossils to trace fossil records. We suggest that fundamental differences between body and trace fossils make this practice inappropriate. These differences stem from the fact that trace fossils represent the behaviour of the tracemaker, and not the phylogenetic affinities of an organism. This database, referred to as IchnoDB, has been tested by the authors throughout the design process to ensure that recommended alterations to current palaeontology databases made herein are functional. In describing the design and logic that underpins an ichnology database, it is our desire to see established palaeontological databases incorporate ichnology specific fields into their structure. This would support and encourage future research, involving the use of large ichnological datasets.
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