Results 71 to 80 of about 1,653 (179)
Palaeontology, Volume 69, Issue 4, July/August 2026.Abstract The oxygen isotope composition (δ18O) of conodont biogenic apatite is a critical proxy for reconstructing past marine temperatures and environments. This study compares δ18O values of Triassic conodonts embedded in chert with those extracted from the same samples using sodium hydroxide (NaOH), a novel alternative to traditional hydrofluoric ...
Manuel Rigo, Ian S. Williams, Shun Muto
wiley +1 more source
Progress and Challenges in Phylogenomics and Genomics of Lophotrochozoa/Spiralia
Zoologica Scripta, Volume 55, Issue 4, Page 521-544, July 2026.ABSTRACT Lophotrochozoa is one of the three major bilaterian groups comprising more than half of the bilaterian phyla. Lophotrochozoa includes among others Mollusca, Annelida, Platyhelminthes and Rotifera. Despite representing such a large proportion of animal diversity, they are historically understudied and genomic resources have been scarce. However,
Torsten H. Struck
wiley +1 more source
Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.Abstract The North Qiangtang Block occupies a pivotal position within the eastern Tethyan realm, and its paleogeographic reconstruction is critical for constraining Tethyan geometry and evolution. However, its Late Paleozoic paleogeography and Paleo‐Tethyan Ocean–continent configuration remain controversial due to limited reliable age‐constrained ...
Jiahui Zhang +12 more
wiley +1 more source
Литосфера, 2015 The Bol’shaya Barma, Akkyr, Ryauzyak and Kuk-Karauk sections in the western slope of the South Urals are considered to be perspective sections for the identification of Famennian Regional Boundary Stratotype Point (RBSP).
R. Ch. Tagarieva, A. G. Mizens
doaj
CrystalsThe movement of valves of bivalved invertebrates is enabled through the action of muscles and the interplay between the muscles and the hinge ligament. The muscles that move the valves attach to their internal surface. To promote the structural integrity
Sebastian Hoerl +8 more
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Lower Silurian biostratigraphy of the Viirelaid core, western Estonia [PDF]
Estonian Journal of Earth Sciences, 2007 The distribution of five groups of fossils in the upper Llandovery (Telychian) and Wenlock of the Viirelaid core section, Estonia, is presented and discussed in terms of their biozones (conodonts and chitinozoans) and mutual positions (scolecodonts ...
Nestor, Viiu +6 more
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The Turonian-Coniacian deposits of the south-west of the Ulyanovsk-Saratov trough
Известия высших учебных заведений: Геология и разведка, 2019 Integrated study of a series of the Turonian and Coniacian complete geological records has revealed the stratigraphic completeness and specified the faunal contents of the deposits.
E. M. Pervushov +4 more
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Study on Some Triassic Macrofossils of the Hasanoğlan-Bayramdere Region, Ankara, Turkey
Bulletin of the Mineral Research and Exploration, 1968 The studied material was collected by the author during the fieldwork carried out in 1966, from the uppermost Triassic dark, coarse-grained sandstones of Bayramdere formation.
Utarit BİLGÜTAY
doaj
The regional stratotype section and point for the base of the Hirnantian Stage (the uppermost Ordovician) at Mirny Creek, Omulev Mountains, Northeast Russia [PDF]
Estonian Journal of Earth Sciences, 2008 A complete Hirnantian sequence comprising the Normalograptus extraordinarius and N. persculptus biozones is well developed at the Mirny Creek section in the Omulev Mountains.
Koren, Tatyana N. +1 more
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A new data about systematic composition of Thanetian flat terebratulids of South-West Crimea
Известия высших учебных заведений: Геология и разведка, 2015 The revision of flat Thanetian terebratulids of South-West Crimea, included until the last time Terebratula bisinuata Lam., T. mischensis Ilyina, T. plana Zel. and Oleneothyris pinguinensis Zel., has been made.
V. N. Komarov, A. O. Andrukhovich
doaj +2 more sources