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Trace fossil zonation in interdune Lakes: example from the neogene of Eastern Patagonia, Argentina Ichnos (IF 0.8) Pub Date : 2024-02-15 Manuel A. Rojas-Manriquez, Silverio F. Feola, Ricardo N. Melchor
The Upper Miocene-Lower Pliocene Río Negro Formation (Río Negro Province, Argentina) contains diverse and abundant continental trace fossils. The purpose of this contribution is to recognize distin...
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Trace fossils of hypersaline environment and its implication in identifying tidal inundation boundary in Great Rann of Kachchh, Western India Ichnos (IF 0.8) Pub Date : 2024-02-04 Darshit Padia, Pranav J. Pandya, Bhawanisingh Desai
Extreme hypersaline environments are known to be challenging ecosystems for the survival of organisms. These extreme environments are characterized by high evaporation, resulting in a drastic reduc...
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Martin G. Lockley (1950–2023): prime mover of vertebrate footprint studies Ichnos (IF 0.8) Pub Date : 2024-02-02 Spencer G. Lucas, Karen J. Houck, Adrian P. Hunt, Jeffrey J. Lamontagne, Gretchen K. Minney, Louis H. Taylor
Published in Ichnos: An International Journal for Plant and Animal Traces (Ahead of Print, 2024)
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The first hadrosaurid trackway from the horseshoe canyon formation (campanian/maastrichtian) of Alberta, Canada Ichnos (IF 0.8) Pub Date : 2024-02-01 Mark J. Powers, Matthew M. Rhodes, Aaron D. Dyer, Steven E. Mendonca, Ryan Wilkinson, Michael Naylor Hudgins, Matthew J. Pruden, Philip J. Currie, Gregory F. Funston
The Horseshoe Canyon Formation has provided a wealth of vertebrate skeletal fossils over the past 100 years of collection. Vertebrate trace fossils such as footprints and trackways, however, have b...
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A new ichnospecies Nummipera saraswatii from the early Eocene (Ypresian) Assilina bank deposits of the Naredi Formation, Kutch Basin, India Ichnos (IF 0.8) Pub Date : 2024-01-31 Mohuli Das, Sudipta Dasgupta, Renzo D’souza, Abhishek Natarajan
A new ichnospecies of the ichnogenus Nummipera Hölder, 1989 has been documented in the carbonate packstone and wackestone of the Ypresian (early Eocene) Naredi Formation from the western Kutch (Kac...
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Aratichnus igen. nov. from the Eocene-aged Baronia Formation, Àger Basin, Lleida, Spain Ichnos (IF 0.8) Pub Date : 2024-01-25 Brette S. Harris, Cornel Olariu, Scott Melnyk, Maya T. LaGrange, Kurt O. Konhauser, Murray K. Gingras
Aratichnus, new ichnogenus, is described from a lower Eocene-aged, tidally reworked sandstone unit (Baronia Formation) near Baronia de Sant Oïsme, Spain. Aratichnus n. igen. is a horizontal, epichn...
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Review of 17th international ichnofabric workshop, 23–25 October 2023 in Faxe (Denmark) Ichnos (IF 0.8) Pub Date : 2023-12-24 Gregory J. Retallack
Published in Ichnos: An International Journal for Plant and Animal Traces (Ahead of Print, 2023)
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Diving neoichnology: underwater fieldwork focusing on organism and seafloor ecosystem interactions Ichnos (IF 0.8) Pub Date : 2023-11-23 Koji Seike
Because almost all marine trace fossils were produced in underwater settings such as shoreface, offshore, continental shelf, slope, trench, and abyssal plain, investigating their modern analogues i...
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Burrow systems of modern subterranean rodents (Ctenomyidae): key neoichnologic features and recognition of fossil examples Ichnos (IF 0.8) Pub Date : 2023-11-23 Maria Cristina Cardonatto, Ricardo Néstor Melchor
This study is aimed to identify the distinctive ichnologic features of burrow systems of two ctenomyid species of extant solitary and subterranean rodents (Ctenomys azarae and C. talarum occidental...
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First tetrapod swim traces and associated ichnofauna from the Mesozoic of Algeria, North Africa Ichnos (IF 0.8) Pub Date : 2023-11-23 Imad Bouchemla, Madani Benyoucef, Hendrik Klein, Mohammed Adaci
We report tetrapod traces and associated ichnofauna from two stratigraphic, dominantly terrestrial levels of the Tiout Formation (Valanginian-latest Albian to lower Cenomanian) in Laghouat and Brez...
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The paleoichnofauna in bones of Brazilian Quaternary cave deposits and the proposition of two new ichnotaxa Ichnos (IF 0.8) Pub Date : 2023-10-22 Lucas Henrique Medeiros da Silva Trifilio, Hermínio Ismael de Araújo Júnior, Kleberson de Oliveira Porpino
The Quaternary vertebrate paleontology of the Brazilian Intertropical Region is well-known, but there are only a few publications on bone ichnology. In this paper, we analyzed trace fossils in 23 b...
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New records of Ctenopholeus in the early Devonian Hunsrück Slate of Bundenbach, SW Germany Ichnos (IF 0.8) Pub Date : 2023-09-14 Markus J. Poschmann, Dirk Knaust, Thomas Schindler
The rare trace fossil Ctenopholeus kutscheri Seilacher & Hemleben, originally described from the type area of the early Devonian Hunsrück Slate at Gemünden (Germany), refers to initially open horiz...
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First report of a Late Triassic dinosaur track from the Zigui Basin, Middle Yangtze region, China Ichnos (IF 0.8) Pub Date : 2023-08-28 Long Cheng, Yangui Li, William J. Foster, Jean-David Moreau, Chunbo Yan, Huazhou Yao, Chuanshang Wang, Lide Chen
Trace fossils offer a great potential to enhance our understanding of the rise of dinosaurs and their interactions with the environment. Here, we report a Rhaetian theropod footprint found in the S...
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Pleistocene fossil snake traces on South Africa’s Cape south coast Ichnos (IF 0.8) Pub Date : 2023-08-28 Charles W. Helm, Mark D. Bateman, Andrew S. Carr, Hayley C. Cawthra, Jan C. De Vynck, Mark G. Dixon, Martin G. Lockley, Willo Stear, Jan A. Venter
Snakes form a large, familiar, and distinctive component of the world’s reptile fauna, with a rich body fossil record stretching back to the Jurassic. The sparse, minimal, and questionable evidence...
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Possible shod-hominin tracks on South Africa’s Cape coast Ichnos (IF 0.8) Pub Date : 2023-08-28 Charles W. Helm, Martin G. Lockley, Hayley C. Cawthra, Jan C. De Vynck, Mark G. Dixon, Renée Rust, Willo Stear, Monique Van Tonder, Bernhard Zipfel
When and where did humans first fashion footwear? Ichnology holds the potential to answer this unresolved question in palaeoanthropology. The global record of sites from which shod-hominin tracks h...
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Ichnology of tidal ravinement omission surfaces in siliciclastic transgressive deposits from the Puesto El Moro formation (Upper Cretaceous), Southern Patagonia, Argentina Ichnos (IF 0.8) Pub Date : 2023-08-08 Sebastián Richiano, Damián Moyano-Paz, Augusto N. Varela, Murray K. Gingras, Daniel G. Poiré
Abstract Omission surfaces represent a gap in the sedimentary record on a particular environment, constituting an important tool for basin analyses. Nevertheless, not always these surfaces constitute key sequence-stratigraphic surfaces, and their correct interpretation is highly important for the recognition of genetically related strata. Documentation and interpretation of ichnological data from stratigraphic
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The importance of laboratory-based neoichnological experiments for aquatic palaeoecological analyses Ichnos (IF 0.8) Pub Date : 2023-06-21 John-Paul Zonneveld, Murray K. Gingras
Abstract Neoichnological analyses are essential for the accurate assessment and interpretation of ancient, trace-bearing sedimentary successions. Behaviours exemplified by modern organisms are diverse and commonly complex. Direct observation is most easily accomplished in shallow aquatic and subaerially exposed settings, with sustained observation limited primarily to the latter. Laboratory-based neoichnological
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Bromleyia magnifica n. igen., n. isp.: a feeding trace of a protobranch bivalve Ichnos (IF 0.8) Pub Date : 2023-06-12 María I. López Cabrera, M. Gabriela Mángano, Luis A. Buatois, Eduardo B. Olivero, Christopher G. Maples, Allan A. Ekdale
Abstract The new ichnotaxon Bromleyia magnifica n. igen., n. isp., attributed to the feeding activity of bivalves, is proposed. This ichnotaxon consists of clusters of closely spaced curved ridges that form a fan-shaped structure oppositely distributed on both sides of a longitudinal axis or, more rarely, being present only on one side. Intergradation between Protovirgularia, Lockeia, and Bromleyia
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New ichnospecies and redescription of Caedichnus Stafford et al., 2015, traces indicative of durophagous predation Ichnos (IF 0.8) Pub Date : 2023-06-09 Samantha J. Nicol, Lindsey R. Leighton
Abstract Predation traces on marine shelled prey are informative and widely utilized indicators of predatory attacks in the scientific literature. Most of these traces remain undescribed and unnamed, making it difficult to identify and quantify predatory behaviour in the fossil record. Two new ichnospecies, Caedichnus cisus and Caedichnus lunaris, have been described and erected into the emended ichnogenus
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Effects of X-ray computed tomography (CT) on the ichnologic interpretation of the Mira River estuary sediment core, SW Portugal Ichnos (IF 0.8) Pub Date : 2023-05-30 Alina Shchepetkina, Teresa Drago, Jacqueline Santos, Ana Alberto
Abstract Computed tomography (CT) is a relatively new technique in ichnofossil analysis, which permits superior identification of individual trace fossils, their morphology, infill, tiering relationships, and preservation potential, thus providing better environmental interpretations. It also allows non-professional ichnologists to interpret trace fossils in 3D slices with ease, especially in relatively
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The Jurassic–Cretaceous boundary in the Kurovice section (Southern Moravia, Czech Republic): trace fossils, stable isotopes, and magnetic susceptibility Ichnos (IF 0.8) Pub Date : 2023-05-24 Radek Mikuláš, Miroslav Bubík, Tiiu Elbra, Martin Košťák, Petr Pruner, Petr Schnabl, Kristýna Šifnerová
Abstract In the Kurovice Quarry (southern Moravia), the paleoenvironmental conditions around the Jurassic–Cretaceous boundary were deciphered using geochemical, magnetic, macrofaunal, microfaunal, and ichnologic evidence. In addition to weakly bioturbated horizons, four discernible ichnologic assemblages (IA1–IA4) were distinguished. Geochemical changes were recorded both between individual ichnologic
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Bioturbation changing porosity, permeability, and fracturability in chalk? Insights from an Upper Cretaceous chalk reservoir (Buda Formation, Texas, USA) Ichnos (IF 0.8) Pub Date : 2023-05-23 Fernando L. Valencia, Olga M. Oliveira de Araújo, Luis A. Buatois, M. Gabriela Mángano, Gustavo L. Valencia, Ricardo Lopes, Juan Carlos Laya
Abstract The continuous rise in hydrocarbon demand, the production decline in conventional oilfields, and the remarkable improvement in extraction methods have allowed the hydrocarbon industry and subsequently, geoscientists, to turn to studies on both unconventional and mature fields with untapped potential. In such reservoirs, the application of advanced drilling, completion, and production techniques
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Trace fossils on megafaunal bone remains from Quaternary natural tank deposits of Brazil: A case study in João Cativo Paleontological site, Megafauna Valley, Brazil Ichnos (IF 0.8) Pub Date : 2023-05-04 João Paulo da Costa, Lucas Henrique Medeiros da Silva Trifilio, Hermínio Ismael de Araújo-Júnior, Celso Lira Ximenes
Abstract Northeastern Brazilian natural tank deposits stand out among the sedimentary deposits bearing megafauna remains in South America. João Cativo Paleontological Site (JCPS, Itapipoca, Ceará State, Brazil) is included in the Megafauna Valley and is one of the main sources of paleoecological data in that area. This study reveals trace fossils detected on Quaternary megafauna remains recovered from
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Dating the Pleistocene hominin ichnosites on South Africa’s Cape south coast Ichnos (IF 0.8) Pub Date : 2023-04-25 Charles W. Helm, Andrew S. Carr, Martin G. Lockley, Hayley C. Cawthra, Jan C. De Vynck, Mark G. Dixon, Willo Stear, Guy H. H. Thesen
Abstract Seven hominin ichnosites in aeolianites on the Cape south coast of South Africa have been dated using Optically Stimulated Luminescence, yielding age estimates from Marine Isotope 6 through Marine Isotope Stage 4. All rock outcrops containing these sites are situated on the modern coastline. The new ages are consistent with geomorphological expectations, and with other numerical dating results
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The first Mesozoic vertebrate coprolites from Algeria Ichnos (IF 0.8) Pub Date : 2023-03-22 Mohamed Bendella, Adrian Hunt, Madani Benyoucef, Imad Bouchemla
Abstract Nine morphotypes of coprolites, including Heteropolacopros texaniensis, Liassocopros isp., Hyronocopros amphipola, Eucoprus isp. 1, Eucoprus isp. 2, Morphotype 1, Morphotype 2, Morphotype 3, and Morphotype 4, are distinguished from the basal Late Cretaceous (Lower Cenomanian) of the ‘Continental Intercalaire’ deposits at Gara Samani (Sahara, southern Algeria). This coprofauna is the first
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A gar-bitten vertebrate coprolite from the Neogene of the Atlantic Coastal Plain, USA, and a new ichnospecies of Machichnus Mikuláš et al., 2006 Ichnos (IF 0.8) Pub Date : 2023-03-15 Adam Lindholm, Stephen J. Godfrey, Lauck W. Ward, Alberto Collareta
Abstract Vertebrate-bitten coprolites are seemingly rare; nonetheless, within the past dozen years, a handful of these composite trace fossils have been found and described. Here, we describe a single crocodile coprolite from the Lower Miocene Calvert Formation in New Kent County, Virginia, USA, showing bite marks. The size and morphology of the coprolite is consistent with a crocodilian origin. Seven
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Morphology of Radhostium carpaticum Plička and Říha, 1989 in new finds from the Outer Western Carpathians (Upper Cretaceous – Eocene flysch deposits of the Biele Karpaty Mountains, Slovakia) Ichnos (IF 0.8) Pub Date : 2023-03-06 Vladimír Šimo, Barbara Zahradníková
Abstract A new find of one specimen of the relatively rare trace fossil Radhostium carpaticum is the subject of this morphological study. The new find from the Biele Karpaty Unit, is preserved on the soles of turbiditic sandstones within the Upper Cretaceous and Eocene turbiditic sequence of the Svodnice Formation in the Biele Karpaty Mountains, Slovakia. The morphological study of the trace fossil
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Taphonomic overprinting on the late Palaeozoic terrestrial plant–animal interactions: a noise in the record Ichnos (IF 0.8) Pub Date : 2023-03-06 Abhijit Chakraborty, Sunipa Mandal, Sreepat Jain
Abstract Plant–animal interactions investigated largely in Glossopteris leaf fossils (1214 specimens) from the lower Permian strata of peninsular India reveal evidence of taphonomic modifications of the ichnofabric. The leaf fossils indicate both above-ground (pre-depositional) and on-ground (post-depositional) animal activities. Animal traces that extend beyond the margins of the leaf compressions
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The speed and displacement of the Laetoli Site G track-maker hominins Ichnos (IF 0.8) Pub Date : 2023-02-27 Javier Ruiz, Federico Mansilla, Juan Luis Arsuaga, Elena Santos, Alberto Jiménez-Díaz, Isabel Egea-González
Abstract Since their discovery in 1978, the hominin fossil footprints from Laetoli have been the focus, of extensive research on the locomotion, speed, body size, and behavior of the responsible track-makers (nominally Australopithecus afarensis). In this work, we show that careful examination of walking speed and displacement yields valuable information regarding the interaction between individuals
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First record of a small stegosaur footprint (cf. Stegopodus) from the ?Upper Jurassic-?Lower Cretaceous red beds of the Middle Atlas, Morocco Ichnos (IF 0.8) Pub Date : 2023-02-27 Mostafa Oukassou, Omar Zafaty, Gerard D. Gierliński, Hendrik Klein, Hafid Saber, Mustapha Amzil, André Charrière
Abstract We describe an isolated small stegosaur pes track from the ?Upper Jurassic-?Lower Cretaceous red beds of the folded Middle Atlas, Morocco. It comes from the base of the Oued El Atchane Formation which unconformably overlies the Middle Jurassic (Upper Bathonian-? Callovian) El Mers III Formation. The footprint is preserved as concave epirelief together with a natural cast on a fluvial sandstone
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Invertebrate trace fossils from Paleogene fluvial strata in Western Washington, USA Ichnos (IF 0.8) Pub Date : 2023-02-27 George E. Mustoe
Abstract Fluvial strata in the Paleogene Chuckanut Formation contain a wealth of trace fossils that include both vertebrate and invertebrate ichnofossils. Vertebrate traces have received careful scrutiny, but invertebrate traces have not previously been described. Trace fossils occur in two sediment types. Mudstones deposited in subaqueous environments include highly bioturbated layers that are dominated
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Teredolites driftwood from the Arkadelphia Formation–Midway Group Contact (K–Pg), Malvern, Arkansas, USA Ichnos (IF 0.8) Pub Date : 2023-02-25 Harry M. Maisch IV, Martin A. Becker
Abstract Partially carbonized driftwood recovered from a lag deposit at the Arkadelphia Formation–Midway Group Contact (K–Pg) near Malvern, Arkansas contains an abundance of macrobioerosion. Macroborings are oriented perpendicular and oblique to the wood grain, straight to sinuous in shape, ≤8 cm long, may have calcitic linings, and belong to Teredolites clavatus (Kelly & Bromley, 1984). The abundance
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On the status of the ichnotaxon Mandaodonites coxii Cruickshank, 1986 Ichnos (IF 0.8) Pub Date : 2022-10-29 John-Paul Zonneveld
Abstract Three ichnotaxa have been established for putative bite marks on fossil bone: Mandaodonites, Heterodontichnites and Nihilichnus. The first of these ichnotaxa was established for a sigmoidal trend of 17 shallow impressions on the dorsal surface and 16 deeper impressions on the ventral surface of a Middle Triassic kannemeyeriid dicynodont femur from southern Tanzania. To date the only referred
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Sedimentological and ecological significance of a biodeformational structure associated with an unusual feeding behavior in gulls (Larus sp.) Ichnos (IF 0.8) Pub Date : 2022-05-29 Scott Melnyk, Cody N. Lazowski, Murray K. Gingras
Abstract Shorebirds produce a range of biogenic sedimentary structures related to their feeding behaviors, the most common of which are probing behaviors that result in morphologically simple impressions or indentations on the surface of a sedimentary substrate. Here we describe an unusual biodeformational structure made by a feeding gull (Larus sp.) produced as the tracemaker kneaded the sediment
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Defining and refining principles in ichnotaxonomy: Markus Bertling (1959–2022) Ichnos (IF 0.8) Pub Date : 2022-05-14 Max Wisshak, Dirk Knaust, Lothar H. Vallon, Andrew K. Rindsberg
Published in Ichnos: An International Journal for Plant and Animal Traces (Vol. 29, No. 2, 2022)
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Tooth marks, gnaw marks, claw-marks, bite marks, scratch marks, etc: terminology in ichnology Ichnos (IF 0.8) Pub Date : 2022-04-12 John-Paul Zonneveld, Anthony R. Fiorillo, Stephen Hasiotis, Murray K. Gingras
Abstract Phrases incorporating the modifier ‘mark’ (e.g., bite mark, tooth mark, gnaw mark, etc.) have recently come under attack. These phrases are wide-spread in their usage, and are, in fact, appropriate to the original definition of the word mark. Phrases such as bite mark and tooth mark are de rigueur as interpretive terms in the larger scientific community and in the archaeological, anthropological
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Cruziana and Helminthopsis in fluvial deposits of the uppermost Stockton Formation (Late Triassic), west-central New Jersey Ichnos (IF 0.8) Pub Date : 2022-04-04 Robert Metz
Abstract Fluvial deposits of the uppermost Stockton Formation (Late Triassic), west-central New Jersey have yielded the trace fossils Cruziana tenella and Helminthopsis isp. The ichnotaxa belong to the Scoyenia ichnofacies. On the basis of stratification and primary sedimentary structures, the beds are interpreted as deposits in a meandering stream environment. Worm-like forms, nematodes, notostracans
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Site-selectivity of symbiotic (parasitic?) pits in crinoid column material from the middle Silurian (Wenlock: Sheinwoodian) of western Estonia Ichnos (IF 0.8) Pub Date : 2022-03-15 James R. Thomka, Olev Vinn, Ursula Toom
Abstract Crinoid specimens containing symbiotic (potentially parasitic) pits are relatively rare in Silurian strata of Estonia. The first specimen of middle Silurian-age (Wenlock: Sheinwoodian) crinoid material containing such pits—a pluricolumnal of uncertain affinity—was recently reported from the Jaagarahu Formation of Saaremaa Island. The presence and morphology of pits were previously described
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Possibly the oldest fish-made resting traces Ichnos (IF 0.8) Pub Date : 2022-03-09 Korhan Ayranci, Andreas Wetzel, Michael A. Kaminski, Bedri Kurtulus, Lotfi Rabaoui
Abstract The Silurian Sharawra Member (middle to late Llandoverian) in Saudi Arabia exhibits unique surface traces with exceptional preservation: Seven small, wing-shaped traces occur on a sandstone slab showing well-defined hummocky cross-stratification having a few decimeters wavelength being covered by a thin mud layer. These traces are preserved as concave epirelief along with elongated internal
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The trace fossil Gyrolithes lorcaensis from the Lower Cretaceous of the Kopet-Dagh Basin, NE Iran Ichnos (IF 0.8) Pub Date : 2021-12-30 Seyed Mohammad Ali Moosavizadeh, Dirk Knaust
Abstract The helical, vertical trace fossil Gyrolithes lorcaensis is described from marine to marginal-marine deposits of the Lower Cretaceous of the Sarcheshmeh Formation near the city Kalat-e-Naderi in the Kopet-Dagh Basin. This is the first report of Gyrolithes from Iran and thus expands the geographic range of this trace fossil. G. lorcaensis is characterized by its unique morphometric parameters
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A new occurrence of archosaur footprints from the Löwenstein Formation (Late Triassic, Middle Norian) of southern Germany Ichnos (IF 0.8) Pub Date : 2021-12-29 Alexander Wagensommer, Simone D’Orazi Porchetti, Hans Dieter Bolter, Matteo Antonelli, Frank-Otto Haderer
Abstract Two sandstone slabs from a new Norian tetrapod tracksite in the Löwenstein Formation of southern Germany preserve a set of tracks including both tridactyl and pentadactyl ichnites, referred to theropod dinosaur and sphenosuchian crocodylomorph trackmakers, respectively. A very large manus print hints at the presence of a hitherto unknown large quadrupedal archosaur in the Norian fauna of southern
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First record of the Permian nonmarine helical trace fossil Augerinoichnus from outside of New Mexico Ichnos (IF 0.8) Pub Date : 2021-12-21 Sebastian Voigt, Spencer G. Lucas, Manfred Raisch, Thomas Schindler
Abstract Augerinoichnus refers to successions of horseshoe-shaped structures interpreted as sedimentary remains of horizontal helical burrows of worm-like animals. The monospecific trace fossil was hitherto only known from early Permian intertidal to lowland coastal-plain deposits of New Mexico, U.S.A. Recent discoveries of conspecific material in early Permian nearshore lacustrine deposits of southwestern
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First occurrence of jumping trackway in upper Paleozoic glacially-related deposits, Paraná Basin, Brazil, and paleoenvironmental implications Ichnos (IF 0.8) Pub Date : 2021-11-18 Dhiego Cunha da Silva, Cristina Silveira Vega, Fernando Farias Vesely, Danielle Cristine Buzatto Schemiko, Robson Tadeu Bolzon
Abstract Ichnology is fundamental to understanding characteristics of paleoenvironments such as hydrodynamic energy, oxygenation, salinity and substrate consistency. The Itararé Group is a Mississippian-Cisuralian lithostratigraphic unit of the Paraná Basin, in which trace fossils have been increasingly employed in paleoenvironmental reconstructions during the Late Paleozoic Ice Age in western Gondwana
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Scratch circle from the Passaic Formation (Late Triassic), West-Central New Jersey Ichnos (IF 0.8) Pub Date : 2021-11-09 Robert Metz
ABSTRACT Scratching, forming one sharply-defined, somewhat elliptical scratch circle, surrounds a narrow-filled tube probably formed by a plant stem. Water currents carrying sediment onto a lacustrine shoreline swirled around a plant leaf, etching out a partial scratch circle. Later settling of the finest material resulted in a veneer of mud filling the scratch circle.
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Webinar report: Seminario Virtual Internacional de Icnología de Vertebrados – SEVIIV2021 Ichnos (IF 0.8) Pub Date : 2021-11-09 Ricardo Melchor Webinar Convener
(2021). Webinar report: Seminario Virtual Internacional de Icnología de Vertebrados – SEVIIV2021. Ichnos: Vol. 28, No. 4, pp. 321-322.
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Ron Pickerill Memorial Issue Ichnos (IF 0.8) Pub Date : 2021-11-09 David Keighley, Murray Gingras, Luis Buatois
(2021). Ron Pickerill Memorial Issue. Ichnos: Vol. 28, Ron Pickerill Memorial Volume; Guest editor Dr. David Keighley., pp. 163-163.
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Ichnology of a dolomitized raised reef: Hopegate Formation, Jamaica (Upper Pliocene) Ichnos (IF 0.8) Pub Date : 2021-11-09 Stephen K. Donovan, Roger W. Portell
Abstract The Upper Pliocene Hopegate Formation of north central Jamaica is a dolomitized raised reef. Hitherto, its palaeontology has been largely ignored because of the poor preservation; the Hopegate Formation is highly karstified, well indurated and fossils are commonly preserved as molds. However, moldic preservation has enhanced the common borings. Ichnotaxa identified from this formation include
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Taphonomy of a limpet Ichnos (IF 0.8) Pub Date : 2021-08-17 Stephen K. Donovan
Abstract Limpets are a group of gastropods that generate distinctive traces – their homing scars – and whose shells are bored both by predators and invertebrates forming domiciles. A Recent shell of Patella vulgata Linnaeus shows a distinctive and unusual preservation. It was collected from the north (Solent) coast of the Isle of Wight, southern England, from Queen Victoria’s private bathing beach
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Enigmatic vertebrate trackway from the Scalby Formation (Middle Jurassic) Yorkshire, United Kingdom, with discussion of archosaur and ‘mammal’ trace fossils Ichnos (IF 0.8) Pub Date : 2021-06-16 Elsa Panciroli, Mike Romano
Abstract We describe a new and unusual vertebrate trackway from the Middle Jurassic Scalby Formation of the Cleveland Basin, Yorkshire, United Kingdom. The Enigmatic Burniston Trackway (EBT) is the first and only example of such a trackway known from this region. The best preserved EBT print, belonging to a pentadactyl tetrapod, does not resemble any known Middle Jurassic ichnogenus, but shares features
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Large mammal tracks in 1.8-million-year-old volcanic ash (Tuff IF, Bed I) at Olduvai Gorge, Tanzania Ichnos (IF 0.8) Pub Date : 2021-06-14 Tessa Plint, Clayton R. Magill
Abstract Large animal tracks, unequivocally attributable to terrestrial mammals, are reported for the first time in sediment from uppermost Bed I (Tuff IF; ∼1.803 million years ago) at Olduvai Gorge, Tanzania. One track in particular (attributed to the ichnogenus Pecoripeda) retains an exceptional level of detail, demonstrating the excellent trackway-preserving potential of the volcanic ash fall (tuff)
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The earliest-published recognition of a trace fossil and its producer Ichnos (IF 0.8) Pub Date : 2021-06-03 Thomas J. D. Halliday
Abstract The recognition of fossil material as organic represented a sea change in European understanding of geology. Throughout the Renaissance and Early Modern periods, several thinkers approached the same line of reasoning, from Leonardo da Vinci to Nicolas Steno. Among fossil material, trace fossils are furthest removed from the living organism, and the identification of trace fossils as such is
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Neoichnological study of two species of burrowing darkling beetles (Coleoptera: Tenebrionidae) from larval to adult stages Ichnos (IF 0.8) Pub Date : 2021-07-01 Hayden A. Thacker, Daniel I. Hembree
ABSTRACT Beetles (Coleoptera) are a critical component of terrestrial ecosystems filling numerous ecological roles. Soil-dwelling beetles play an important role in pedogenesis through the production of biogenic structures throughout their life cycle. Given their life habits, beetle trace fossils should be abundant in the fossil record and a number of ichnotaxa have been attributed to beetles, yet there
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Oldhamia from the Oligocene/Miocene-age deep-marine Algeciras Unit, Campo de Gibraltar Complex, southeast Spain: First record of this characteristic Lower Palaeozoic (mainly Cambrian) ichnofossil from younger strata Ichnos (IF 0.8) Pub Date : 2021-06-23 Tom McCann
Abstract The ichnofossil Oldhamia is considered to be characteristic of deep-marine, Cambrian-age successions. Recent work from an Oligocene/Miocene-age sedimentary succession in the southwest of Spain revealed the presence of well-preserved Oldhamia at the base of two beds (which occur close to one another). Oldhamia was associated with a range of other ichnofossils including Belorhaphe, Chondrites
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Ichnology and biostratigraphic significance of Cambrian trace fossils from the lowest stratigraphic level of Kunzam La Formation, Chandra Valley, Lahaul and Spiti, India Ichnos (IF 0.8) Pub Date : 2021-06-18 Ramanpreet Kaur, Birendra P. Singh, Om N. Bhargava, Radek Mikuláš, Garry Singla, Subhay K. Prasad, Stanzin Stopden
Abstract Trace fossils are abundant in the Cambrian Kunzam La Formation in the Lahaul and Spiti regions of the Himalaya. All previously known records belong stratigraphically to the upper part of the Cambrian Series 2/Stage 4 to the Miaolingian Series. In the present work, 15 ichnogenera comprising 26 recorded ichnospecies come from the lower part of the Kunzam La Formation exposed in the Chandra Valley
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The earliest occurrence of the ichnogenus Psilonichnus: a new record from the Mississippian of the West of Ireland Ichnos (IF 0.8) Pub Date : 2021-06-18 Eamon Doyle, Patrick Orr, John Murray
Abstract The ichnogenus Psilonichnus Fürsich, 1981 is recorded for the first time from the Mississippian (Brigantian regional substage) limestones of the Slievenaglasha Formation from the west coast of County Clare, Ireland. This record extends the known range of Psilonichnus which has previously been recorded from rocks of Jurassic or younger age. The trace maker of the burrows described herein has
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A fossil carbonate rocky shore in the Kalcit Quarry: a new insight into echinoid shallow marine bioerosion (Miocene; Czech Republic) Ichnos (IF 0.8) Pub Date : 2021-06-18 Jaroslav Šamánek, Radek Mikuláš, Lucie Hájková
ABSTRACT A Miocene fossil rocky coastline is well preserved in Kalcit Quarry near Brno. It differs from the few preserved coeval coastlines of the Central Paratethys in the dominance of borings attributable to echinoids. These borings are represented by roughly smooth shallow circular pits interpreted as dwelling traces of echinoids. Ichnotaxonomically, they can be placed in the ichnospecies Circolites
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Unnecessary “axiotypes” Ichnos (IF 0.8) Pub Date : 2021-06-17 Markus Bertling, Francisco Welter-Schultes
ABSTRACT Contrary to common perception, the International Code of Zoological Nomenclature does not contain provisions that turn (ichno)specific names into nomina dubia if their holotype is lost or destroyed. Such names are only nomina dubia if the original diagnosis and/or description is insufficient to recognise the taxon. For this reason, there is no need to introduce a category “axiotype” to be
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First record: Dendroidichnites (D. irregulare) in Late Triassic marginal lacustrine deposits of the Passaic Formation, west-central New Jersey Ichnos (IF 0.8) Pub Date : 2021-06-17 Robert Metz
ABSTRACT Fine-grained siltstones of the Late Triassic Passaic Formation, near Milford, New Jersey have yielded the first evidence of the trace fossil Dendroidichnites irregulare in the Newark Supergroup of New Jersey. Associated trace fossils include Helminthoidichnites, Scoyenia, Spongeliomorpha, and the reptile footprint Rhynchosauroides, representing the Scoyenia Ichnofacies. Associated sedimentary
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Psammichnites gigas from the lower Cambrian of the Mackenzie Mountains, northwest Canada, and their biostratigraphic implications Ichnos (IF 0.8) Pub Date : 2021-06-16 Robert B. MacNaughton, Karen M. Fallas, Theron D. Finley
Abstract New occurrences of Psammichnites gigas are reported from the Mackenzie Mountains, northwest Canada. A locality in the hanging wall of the Plateau Fault, just below the top of the upper member of the Backbone Ranges Formation, demonstrates that the uppermost part of the unit is Tommotian (latter part of Cambrian Age 2) or possibly earliest Atabanian (earliest Cambrian Age 3) in its previously