Results 41 to 50 of about 1,022 (197)
Paleoceanography and Paleoclimatology, Volume 37, Issue 3, March 2022., 2022 Abstract The current study presents new bed‐by‐bed brachiopod δ13C and δ18O records from Öland, Sweden, which together with previously published data from the East Baltic region, constitutes a high‐resolution paired brachiopod and bulk rock carbon and oxygen isotope archive through the Lower to Upper Ordovician successions of Baltoscandia.
Oluwaseun Edward +7 more
wiley +1 more source
Sedimentology, Volume 69, Issue 1, Page 162-198, January 2022., 2022 ABSTRACT Bryozoan–stromatolite associations (bryostromatolites) formed conspicuous reef structures throughout the Sheinwoodian (Wenlock) to Ludfordian (Ludlow) stratigraphy on Gotland but have not been described so far. They are mainly composed of encrusting bryozoans forming a complex intergrowth with porostromate and spongiostromate microbes and are ...
Anna Lene Claussen +3 more
wiley +1 more source
Papers in Palaeontology, Volume 7, Issue 4, Page 1977-1993, November 2021., 2021 Abstract Conodonts are an extinct group of early vertebrates. Articulated fossils of their feeding apparatus (‘natural assemblages’) are rare, and preserved soft tissues vanishingly so. Here, a primitive conodont with preserved soft tissues is redescribed from the Waukesha Lagerstätte of Wisconsin, USA.
Duncan J. E. Murdock +2 more
wiley +1 more source
Symmetry in graptolite zooids and tubaria (Pterobranchia, Hemichordata)
Evolution &Development, Volume 23, Issue 6, Page 513-523, November 2021., 2021 Abstract Extant and fossil pterobranchs show distinct symmetry conditions of the individual zooids and their tubaria that are not necessarily comparable. The strict bilateral symmetry in the zooids of extant Cephalodiscida is modified to a considerable anatomical asymmetry in extant Rhabdopleurida. This type of left–right asymmetry can be recognized as
Jörg Maletz
wiley +1 more source
Phylogenetic response of naraoiid arthropods to early–middle Cambrian environmental change
Palaeontology, Volume 64, Issue 1, Page 161-177, January 2021., 2021 Abstract The Cambrian Period, primarily known for animal life diversifying, experienced global extinctions. Pulses of extinction in Cambrian Series 2 are exemplified by the disappearance of archaeocyath sponges and olenelline and redlichiid trilobites.
Andrew D. Bond +2 more
wiley +1 more source
Ordovician graptolites from the basal part of the Palaeozoic transgressive sequence in the Karadere area, Zonguldak Terrane, NW Turkey [PDF]
Estonian Journal of Earth Sciences, 2014 The Karadere area to the east of Safranbolu in NW Anatolia is one of the very few localities in Turkey where the contact between the Cadomian basement and the Lower Palaeozoic transgressive succession is well exposed.
M. Cemal Göncüoglu +3 more
doaj +1 more source
Lithosphere, 2022 Amalgamation of the Yangtze and Cathaysia blocks in the context of Gondwana assembly in the early Paleozoic has been addressed for decades, but the far-field effects on the Yangtze Block during the amalgamation remain unclear.
Hao Tang +8 more
doaj +1 more source
The Upper Tremadocian (Ordovician) graptoliteBryograptus: taxonomy, biostratigraphy and biogeography [PDF]
Palaeontology, 2010 Abstract: The taxonomy, biostratigraphical and palaeogeographical distribution of the Lower Ordovician graptolite genus Bryograptus is evaluated. Bryograptus is recognized as a distinct triradiate anisograptid with a multiramous, pendent rhabdosome.
Maletz, Jörg +2 more
openaire +2 more sources
Trilobite expansion into estuarine environments during the Ordovician radiation [PDF]
Estonian Journal of Earth Sciences, 2023 Trilobites have traditionally been considered fully marine. Through the integration of ichnological, palaeobiological and sedimentological datasets within a sequence-stratigraphic and stratiÂgraphic palaeobiology framework, we challenge this assumption.
M. Gabriela Mángano +5 more
doaj +1 more source
Broeggeria Walcott and other upper Cambrian and Tremadocian linguloid brachiopods from NW Argentina [PDF]
, 2017 The Broeggeria assemblage is a peculiar brachiopod association that has been recorded mainly from Tremadocian black shales of Baltoscandia, the Anglo-Welsh Basin, Nova Scotia, South Urals and Kazakhstan.
Muñoz, Diego Fernando +5 more
core +1 more source