Data from: A review of the glacial environment arthropod trace fossils Umfolozia and Warvichnium with the description of new ichnotaxa

<p><span>Trace fossils are important records of the presence and behaviour of animals in the past, especially in deposits where few body fossils are preserved. They tend to provide the main palaeobiological </span>record for past glacial environments and are thus very important for understanding the ecology of these palaeoenvironments. Two ichnogenera are common from past glacial environments: <em>Umfolozia</em> and <em>Warvichnium</em>. Both <em>Umfolozia</em> and <em>Warvichnium</em> are attributed to arthropods, and the former occurs across the Late Palaeozoic Ice Age (LPIA) and the latter occurs during both the LPIA and the Quaternary glacial event. Here, we review the stratigraphic record, ichnotaxonomy, palaeoecology, palaeoenvironments, and likely tracemakers of these two ichnogenera. In addition to assessing morphological ichnotaxobases, we use multivariate morphometric analysis and inferential statistical tests to support our ichnotaxonomic revisions. The diagnosis of <em>Umfolozia</em> is revised, with the description of a new ichnospecies, <em>Umfolozia</em> <em>terere</em> isp. nov., and the emendation of the previously named <em>Umfolozia</em> <em>riojana</em> (formerly <em>Umfolozia</em> <em>longula</em>) nom. rev. emend. We revised Warvichnium, maintaining the original <em>Warvichnium</em> <em>ulbrichi</em>, and allocating two morphologies to the ichnogenus <em>Irichnus</em>: <em>Irichnus</em> <em>saltatorius</em> and <em>I. paripinnatus</em> isp. nov.  These trace fossils record several behaviours, and have implications for palaeoenvironmental interpretations and the evolution of invertebrate ecosystems. Using <em>Umfolozia</em> and <em>Warvichnium</em> as case studies, we demonstrate the application of morphometric analysis in ichnotaxonomy and highlight this as a tool that may be applied to other trace-fossil groups.</p>