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    Wyświetlanie 1-12 z 12
    Tytuł:
    Construction of ichnogeneric names
    Autorzy:
    Rindsberg, A. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/191214.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    ichnology
    trace fossils
    ichnotaxonomy
    terminology
    Opis:
    Ichnologists have over used the root ichn- “trace”, employing it in new terms and new ichnogenera alike, to the point where it can be difficult to express one self clearly without using it several times in one sentence. The root derives from Ancient iχνος (ichnos), which means “foot print” or “track”, or by extension a “trace”, any sign of an animal’s activity. Perhaps it is time to explore the use of other roots to create new ichnologic terms and genera. Alternative Latin and Greek roots are given here, as well as ad vice on how to construct new ichnogenera in a technically correct and aesthetically pleasing manner.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2015, 85, 3; 529-549
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Revision of the trace fossil Megagrapton Książkiewicz, 1968 with focus on Megagrapton aequale Seilacher, 1977 from the lower Eocene of the Lesser Caucasus in Georgia
    Autorzy:
    Uchman, Alfred
    Lebanidze, Zurab
    Beridze, Tamar
    Kobakhidze, Nino
    Lobzhanidze, Koba
    Khutsishvili, Sophio
    Chagelishvili, Rusudan
    Makadze, Davit
    Koiava, Kakha
    Khundadze, Nino
    Powiązania:
    https://bibliotekanauki.pl/articles/2104772.pdf
    Data publikacji:
    2022
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    ichnology
    flysch
    ichnotaxonomy
    graphoglyptids
    Palaeogene
    Opis:
    Megagrapton Książkiewicz, 1968 is a characteristic deep-sea trace fossil belonging to the group of graphoglyptids and mostly preserved as a network of irregular meshes in hypichnial semirelief. So far, eleven ichnospecies have been distinguished under this ichnogenus, though commonly on weak evidence. The so-far poorly known ichnospecies Megagrapton aequale Seilacher, 1977 is described here on the basis of the numerous, newly discovered specimens from deep-sea siliciclastic deposits of the Bolevani Subsuite (lower Eocene) in the Lesser Caucasus of Georgia, together with other collections and published examples. A neotype of this ichnospecies is designated and the diagnosis emended. M. aequale occurs in lower Cambrian to upper Miocene deep-sea turbiditic deposits, mostly in the Paleogene. It is characterized by relatively small, variable meshes, which have mostly irregular sub-pentagonal, sub-hexagonal or sub-heptagonal shapes that are variable in size and are bordered by curved or straight semicircular ridges. It has been mistaken for Paleodictyon, which forms regular hexagonal nets. Paleodictyon imperfectum Seilacher, 1977 is included in M. aequale as the ichnosubspecies M. a. imperfectum, which is characterized by relatively thin bordering ridges. After critical analysis of all ichnospecies, only M. irregulare Książkiewicz, 1968, M. submontanum (Azpeitia Moros, 1933), and M. aequale are recommended for further use. These are distinguished on the basis of the prevailing morphology of the meshes, irrespective of large differences in morphometric parameters within the ichnospecies. Irredictyon chaos Vialov, 1972 is included in M. irregulare as the ichnosubspecies M. i. chaos, which is characterized by relatively thick bordering ridges. Megagrapton is interpreted as a cast of a subsurface open burrow network with a few connections to the sea floor. The burrows probably functioned as a trap for small organisms (ethological subcategory irretichnia).
    Źródło:
    Geological Quarterly; 2022, 66, 1; art. no. 8
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ptychoplasma conica isp. nov. - a new bivalve locomotion trace fossil from the Lower Jurassic (Hettangian) alluvial sediments of Sołtyków, Holy Cross Mountains, Poland
    Autorzy:
    Pienkowski, G.
    Uchman, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059258.pdf
    Data publikacji:
    2009
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    ichnofossils
    ichnotaxonomy
    repichnia
    crevasse splays
    Hettangian
    Opis:
    A new locomotion (repichnion) trace fossil, Ptychoplasma conica isp. nov., which is composed of chains of hypichnial mounds, is described from Hettangian alluvial sediments in Central Poland. Its occurrence is limited to amalgamated crevasse sand stones. The trace fossil is associated with freshwater bivalves belonging probably to Unionidae. This trace fossil reflects rhythmic (?diurnal) movement of the tracemaker in accordance with the direction of flow in the crevasse channel, where the forward movement took place in the shallow part of a sandstone layer and was interrupted by resting episodes in deeper sediment layer along the mud-sand inter ace. Episodic flood events forced bivalves to produce escape structures, moving from deeper (previous) to upper (later) levels of lateral movements. Some vertical burrows with bivalve body fossils preserved at the bottom suggest a taphonomic burial. P. conica ranges from Late Triassic to Hettangian.
    Źródło:
    Geological Quarterly; 2009, 53, 4; 397-406
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Corkscrew-like horizontal trace fossils with a focus on a new ichnospecies of Helicodromites from the Oligocene Molare Formation of NW Italy
    Autorzy:
    Uchman, Alfred
    Rattazzi, Bruno
    Powiązania:
    https://bibliotekanauki.pl/articles/31342968.pdf
    Data publikacji:
    2023
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    ichnology
    ichnotaxonomy
    new ichnospecies
    Piemonte Tertiary Basin
    Paleogene
    Opis:
    Horizontal helical trace fossils constitute a characteristic burrow architectural design, but their ichnotaxonomy requires some clarification. In this paper, we review and revise this taxonomy on the basis of collections and data from the literature. Helicorhaphe is included in Helicodromites because its type ichnospecies displays the same morphological principles. A new ichnospecies of Helicodromites is distinguished from Oligocene offshore fan delta deposits in NW Italy. All ichnospecies of Helicodromites display a characteristic set of morphometric parameters that allow their distinction. All were probably produced by capitellid polychaetes in a deep tier within the sediment. They were generally stationary burrows, whose tracemakers benefited from feeding on microbes without significant sediment reworking.
    Źródło:
    Geological Quarterly; 2023, 67, 2; art. no. 22
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    In defence of an iconic ichnogenus : Oichnus Bromley
    Autorzy:
    Wisshak, M.
    Kroh, A.
    Bertling, M.
    Knaust, D.
    Nielsen, J. K.
    Jagt, J. W. M.
    Neumann, C.
    Nielsen, K. S. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/191852.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    ichnology
    ichnotaxonomy
    Oichnus
    Tremichnus
    Sedilichnus
    bioerosion
    predation
    Opis:
    By establishing the bioerosion ichnogenus Oichnus, Richard Bromley (1981) addressed ‘small round holes in shells’ and catalysed a series of still ongoing discussions on ichnotaxonomical principles. In a recent revision by Zonneveld and Gingras (2014), Oichnus was rejected, together with Tremichnus Brett, 1985 and Fossichnus Nielsen, Nielsen and Bromley, 2003, by means of subjective synonymisation with the presumed senior synonym Sedilichnus Müller, 1977. However, Sedilichnus is nomenclaturally unavailable, because it is an atelonym (conditionally proposed). In addition, reinvestigation of the type material of ‘Sedilichnus’ shows that it probably describes variably shaped oscula and thus is a genuine morphological character of the host sponge Prokaliapsisjanus, rather than a bioerosion trace fossil. The ichnogenera Oichnus and Tremichnus are re vised, leading to the synonymisation of Balticapunctum Rozhnov, 1989 with Tremichnus, and of Fossichnus with Oichnus. The refined ichnogeneric diagnoses return Oichnus to complete or incomplete bioerosive penetrations in calcareous skeletal substrates, commonly interpreted as praedichnia with or without signs of attachment, while Tremichnus (now including O. excavatus) exclusively refers to shallow pits passing into echinoderm skeletons that are interpreted as domichnia or fixichnia.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2015, 85, 3; 445-451
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Footprints of the earliest reptiles : Notalacerta missouriensis : Ichnotaxonomy, potential trackmakers, biostratigraphy, palaeobiogeography and palaeoecology
    Autorzy:
    Marchetti, Lorenzo
    Voigt, Sebastian
    Lucas, Spencer G.
    Stimson, Matthew R.
    King, Olivia A.
    Calder, John H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1836266.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Carboniferous
    Permian
    eptile tracks
    Notalacerta
    ichnotaxonomy
    trackmaker
    Opis:
    The origin of reptiles in the tetrapod footprint record has always been a debated topic, despite the great potential of fossiliferous ichnosites to shed much light on reptile origins when compared to the much less extensive skeletal record. This is in part due to an unclear ichnotaxonomy of the earliest tracks attributed to reptiles that has resulted in unreliable trackmaker attributions. We comprehensively revise the earliest supposed reptile ichnotaxon, Notalacerta missouriensis, based on a neotype and a selection of well-preserved material from the type locality and other sites. A synapomorphy-based track-trackmaker attribution suggests eureptiles and, more specifically, ́protorothyridids ́ such as Paleothyris as the most probable trackmakers. A revision of the entire Pennsylvanian-Cisuralian record of this ichnotaxon unveils an unexpected abundance and a wide palaeogeographical distribution. The earliest unequivocal occurrence of Notalacerta is in the middle Bashkirian (early Langsettian) at the UNESCO World Heritage Site, Joggins Fossil Cliffs (Joggins, Nova Scotia, Canada). This occurrence also coincides with the earliest occurrence of reptile body fossils (Hylonomus lyelli), which are found at the same site. Notalacerta is abundant and widely distributed during the Bashkirian, mostly in sediments deposited in tidal palaeoenvironments, and less common in the Moscovian and Kasimovian. During the Gzhelian and Asselian, Notalacerta occurrences are unknown, but it occurs again during the Sakmarian and is widespread but not abundant during the Artinskian, mostly in fully continental palaeoenvironments.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2020, 90, 3; 271-290
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pioneer colonization, evidenced by Rhizocorallium in the Middle Triassic of Poland
    Autorzy:
    Stachacz, Michał
    Powiązania:
    https://bibliotekanauki.pl/articles/27311290.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    trace fossils
    bioturbation
    Muschelkalk
    Ichnotaxonomy
    palaeoecology
    post-extinction biota recovery
    Opis:
    A large collection of the trace fossil Rhizocorallium from the Middle Triassic of the Polish part of the Germanic Basin (Peri-Tethys) is analysed and their ichnotaxonomical classification presented. Special attention is given to the deep form of Rhizocorallium with a vertical retrusive spreite, filled with faecal pellets, with detailed documentation of this structure, based on isolated specimens and serial sections. This analysis also reveals ∩-shaped and deep, protrusive structures. A former interpretation of Rhizocorallium as a rapidly formed fugichnion is not followed here; instead, an interpretation of the trace fossil as a complex fodinichnion is proposed. Scavengers and their relation to crinoid meadows, as well as predators, are indicated as potential tracemakers of some Rhizocorallium. Although Rhizocorallium is common throughout the Middle Triassic, unusual forms and the domination of substrates by Rhizocorallium in general mostly occur in the transgressive system of the lowermost Muschelkalk, and in regressive, marginal facies of the lower Keuper. Such a distribution of unusual forms of Rhizocorallium is interpreted as representing opportunistic, pioneer burrow assemblages that developed during the long-term benthic recovery after the P-T crisis, or in unfavourable conditions generally. Moreover, dynamic conditions with mixed clastic-carbonate sedimentation and rapidly varying salinity promoted smooth transitions from Rhizocorallium to Diplocraterion. Similar successions of dominant trace-fossil assemblages, of comparable sizes, occur in many sections around the world and demonstrate the record of slow recovery that continued through the Middle Triassic. The illustrated record of evolution of the Middle Triassic Rhizocorallium assemblages in Poland documents the last two stages of benthos recovery after the P-T boundary. A similar situation is observed around the world and, in many cases, great abundance of Rhizocorallium seems to be an indication of pioneer burrowing in dynamic, unfavourable environments.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2023, 93, 4; 363--379
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synaptichnium tracks from the middle Muschelkalk (Middle Triassic, Anisian) Bernburg site (Saxony-Anhalt, Germany)
    Autorzy:
    Marchetti, Lorenzo
    Klein, Hendrik
    Falk, Daniel
    Wings, Oliver
    Powiązania:
    https://bibliotekanauki.pl/articles/1836265.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Triassic
    tetrapod footprints
    Ichnotaxonomy
    chirotheriid tracks
    Germanic Basin
    tidal palaeoenvironments
    Opis:
    The Solvay Quarry of Bernburg is one of the most important ichnosites from the Muschelkalk of the Germanic Basin. Extensive surfaces with long chirotheriid trackways have been discovered and assigned to Chirotherium and Isochirotherium. Some undescribed step cycles from this site are analysed here and assigned to Synaptichnium isp. These footprints belong to a “thick-digit” Synaptichnium morphotype recognised at several Middle Triassic sites of Pangaea that seems to differ from the currently valid Synaptichnium ichnospecies. This is the first occurrence of Synaptichnium from this site and the only including step cycles one from the track-bearing Muschelkalk successions of N Germany and the Netherlands. A comparison between the tetrapod ichnoassociations of marginal marine and alluvial units of the Muschelkalk of the Germanic Basin reveals a similar ichnofaunal composition but different relative proportions between ichnotaxa. Rhynchosauroides and Procolophonichnium occur more often in tidal units, whereas the alluvial units show a higher abundance of chirotheriid tracks and an overall greater track diversity.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2020, 90, 3; 321-330
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Grammepus Hitchcock, 1858 : A sedimentary variant of the fossil insect trackway Lithographus
    Autorzy:
    Getty, Patrick R.
    Ward, Matthew
    Simon, Jack
    Powiązania:
    https://bibliotekanauki.pl/articles/1835988.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    ichnology
    arthropod ichnotaxonomy
    intergrading trace fossils
    morphological variability
    sediment saturation
    Opis:
    The ichnogenus Grammepus, which is inferred to have been made by a winged (pterygote) insect, was differentiated from other ichnotaxa because its largest tracks were nearly continuous, forming two furrows. Otherwise, it strongly resembles the ichnogenus Lithographus. Examination of both ichnogenera indicate that the largest tracks in Lithographus can be very close together, that some specimens of Grammepus lack furrow-like tracks, and that the type specimen of the type species Grammepus erismatus has separate tracks in some places, and furrow-like ones in others. Given the lack of a feature that can consistently differentiate Lithographus and Grammepus, the latter is synonymized with the former. Experiments with the modern cricket Acheta domesticus in sediment of different saturation levels indicate that a single pterygote producer could produce both “Grammepus-” and Lithographus-like morphologies, with the former being formed in wet, soft sediment wherein the legs drag, and the latter being formed in firmer, drier sediment wherein the legs do not drag.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2021, 91, 2; 113-120
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new etching trace from the Savignone Conglomerate (Oligocene), NW Italy, probably produced by limpet gastropods
    Autorzy:
    Uchman, A.
    Rattazzi, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/139401.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    bioerosion
    ichnotaxonomy
    fan delta
    borings
    attachment
    limpet gastropods
    bioerozja
    ichnotaksonomia
    ślimaki
    Gastropoda
    Opis:
    A new ichnogenus and ichnospecies (Solealites ovalis) of etching trace is preserved on the surfaces of clasts from the Savignone Conglomerate (Oligocene) in the Palaeogene Piemonte Basin in NW Italy. It is a shallow, oval depression with a central elevation, which was produced probably by limpet gastropods and served as their home scar, but other gastropods or even sea anemones are not excluded as the trace makers. The conglomerate is interpreted as a deposit of a fan delta, whose clasts have been bioeroded in an intertidal and shallow subtidal shore zone and redeposited to the deeper sea.
    Źródło:
    Acta Geologica Polonica; 2018, 68, 4; 651-662
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Unusual echinoid resting trace records change in the position of the redox boundary (Palaeogene of the Lesser Caucasus in Georgia)
    Autorzy:
    Uchman, Alfred
    Lebanidze, Zurab
    Kobakhidze, Nino
    Beridze, Tamar
    Makadze, Davit
    Lobzhanidze, Koba
    Khutsishvili, Sophio
    Chagelishvili, Rusudan
    Koiava, Kakha
    Khundadze, Nino
    Powiązania:
    https://bibliotekanauki.pl/articles/2172617.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ichnotaxonomy
    new ichnotaxa
    Irregular echinoids
    deep-sea
    flysch
    Redox boundary
    oxygenation
    ichnotaksonomia
    jeżowce
    muł abisalny
    flisz
    redoks
    natlenianie
    Opis:
    The first recognition of a tracemaker responding to a temporary shift in the redox boundary is recognized. This is recorded by a new trace fossil, Sursumichnus orbicularis igen. et isp. nov., which is established for mound-like structures on the upper surfaces of sandstone beds from the Borjomi Flysch (upper Paleocene–lower Eocene) in the Lesser Caucasus (Georgia). It is connected with the spatangoid echinoid burrow Scolicia de Quatrefages, 1849 and interpreted as a resting trace of the same tracemaker produced after moving up from a deeper position within the sediment. The resting is caused by an episode of unfavourable conditions related to shallowing of the redox boundary. The trace fossil is a component of the Nereites ichnofacies.
    Źródło:
    Acta Geologica Polonica; 2022, 72, 3; 317--330
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The miniature echinoid trace fossil Bichordites kuzunensis isp. nov. from early Oligocene prodelta sediments of the Mezardere Formation, Gokceada Island, NW Turkey
    Autorzy:
    Demircan, H.
    Uchman, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/138714.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ichnologia
    ichnotaksonomia
    nowe taksony
    oligocen
    prodelta
    Tracja
    Turcja
    Bichordites kuzunensis
    ichnology
    ichnotaxonomy
    New taxa
    Oligocene
    Pascichnia
    Prodelta
    Thrace Basin
    Turkey
    Opis:
    The pascichnial trace fossil Bichordites kuzunensis isp. nov. occurs as an epichnial complex structure in early Oligocene prodelta sediments of the Thrace Basin in Gokceada Island, northwest Turkey. It displays characteristics of irregular echinoid burrows such as overall shape and a double meniscate filling with a chevron dorsal suture, in addition to the feature typical of the so far monospecific Bichordites Plaziat and Mahmoudi, 1988, that is a single central core around a single drainage tube. Its miniature size can be related to the small size of the tracemaker (ontogenic feature) or to its dwarfism in a stressed deltaic environment (palaeoecological feature). Its occurrence indicates a period of fully marine conditions during accumulation of the deltaic sediments of the Mezardere Formation.
    Źródło:
    Acta Geologica Polonica; 2012, 62, 2; 205-215
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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