https://mapress.com/mz <p><em><strong>Mesozoic</strong></em> is an international peer-reviewed scientific journal, which publishes high quality, original research contributions as well as review papers. Papers are published in English and they cover a wide spectrum of topics in palaeoentomology, fossil terrestrial arthropods and amber research, i.e. systematic palaeontology, morphology, diversity, palaeogeography, palaeoecology, palaeobehavior, evolutionary and phylogenetic studies on fossil insects and terrestrial arthropods, biostratigraphy, taphonomy, and amber (deposits, inclusions, geochemistry, curation). Descriptions of new methods (analytical, instrumental or numerical) should be relevant to the broad scope of the journal.</p> Magnolia press en-US Mesozoic 3021-1859 <p><span lang="EN-GB">Authors need to complete and return an </span><span lang="EN-GB"><a href="https://mapress.com/phytotaxa/images/copyright.rtf">Assignment of Copyright</a> </span><span lang="EN-GB">form when a paper is accepted for publication. Authors from institutions that do not allow transfer of copyrights to publishers (e.g. government institutions such as USDA, CSIRO) should attach a copyright waiver or similar document.</span></p> https://mapress.com/mz/article/view/mesozoic.2.3.1 <p lang="en-US" align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span style="color: #030304;">The Early Cretaceous ammonite standard zonation based on the Tethyan Realm is found in western Europe. Because </span><span style="color: #030304;">marine faunas also thrived in the Tethyan, Boreal (Arctic), and</span><span style="color: #030304;"> Pacific regions during the Early Cretaceous, it is important to establish additional biochronological scales based on the faunas of each of these paleogeographic regions. Since the North Pacific region formed its own paleobiogeographic realm by the late Early Cretaceous, it is necessary to develop </span><span style="color: #030304;">a standard ammonite zonation for this region, and to establish a relative biochronological time scale and coordinate it with</span><span style="color: #030304;"> that of Western European standard stratigraphy. </span></span></span></span></p> MASAKI MATSUKAWA KENICHIRO SHIBATA Copyright (c) 2025 Magnolia press limited https://creativecommons.org/licenses/by-nc/4.0 2025-09-30 2025-09-30 2 3 175 286 10.11646/mesozoic.2.3.1