DOI: 10.5061/dryad.7wm37pw12
title: Data from: Spatiotemporal dynamics of Nektonic biodiversity and vegetation shifts during the Smithian–Spathian Transition: Conodont and Palynomorph insights from Svalbard

description: The dataset includes an Excel file with sporomorph counting of samples
 from the Stensiöfjellet section, Svalbard. Furthermore, it includes
 additional taxonomic notes on conodonts from the Stensiöfjellet section,
 Svalbard.
description: Two main sections were logged and samples taken: Stensiöfjellet A
 and Stensiöfjellet C sections, ca. 1.2 km apart. For conodonts, we
 collected 17 samples, each weighing approximately 10kg, from section
 Stensiöfjellet C. Of the 17 samples, 11 were taken from the Lusitaniadalen
 Member and 6 from the Vendomdalen Member, with varying spacing between
 samples ranging from 1 m to 60 m. The samples were dissolved using a ~ 10%
 buffered acetic acid solution following the procedure described by
 Jeppsson <em>et al</em>. (1999). The residues were
 concentrated by using sodium polytungstate (Jeppsson & Anehus
 1999) as a heavy liquid for separation. They were then sieved using a
 0.075-mm mesh, and the heavy fraction was handpicked under a binocular
 microscope. The selected conodont elements were illustrated using a
 scattered electron microscope (SEM) (JEOL JSM-6010) without the use of a
 sputter coater and a digital microscope (Keyence VHX 6000).
 For palynological analysis, samples (<em>n</em> = 61
 Stensiöfjellet A, Fig. 1) were cleaned, crushed, and weighed (15 g on
 average) and subsequently treated with concentrated hydrochloric and
 hydrofluoric acid as described by Traverse (2007). The residues were
 sieved over an 11-µm mesh screen. Samples were additionally treated with
 concentrated nitric acid and 30 s of ultrasonic vibration. Residues were
 sieved again over an 11-µm mesh screen. Slides are stored in the
 repository of the Palaeontological Institute and Museum, University of
 Zurich, and are found under PIMUZ A/VI 163 to PIMUZ A/VI 166.
description: # Dataset from: Spatiotemporal dynamics of Nektonic biodiversity and
 vegetation shifts during the Smithian–Spathian Transition: Conodont and
 Palynomorph insights from Svalbard
 [https://doi.org/10.5061/dryad.7wm37pw12](https://doi.org/10.5061/dryad.7wm37pw12) ## Description of the data and file structure The dataset includes: ### Data Table Stensiö Palyno.csv: Sporomorph counting of samples from the Stensiöfjellet section, Svalbard. For palynological analysis, samples (*n* = 61) were cleaned, crushed, weighed (15 g on average), and subsequently treated with concentrated hydrochloric and hydrofluoric acid as described by Traverse (2007). The residues were sieved over an 11-µm mesh screen. Samples were additionally treated with concentrated nitric acid and 30 s of ultrasonic vibration. Residues were sieved again over an 11-µm mesh screen. The Datatable shows the number of sporomorphs counted in each sample. Furthermore, the data table shows how many specimens of each species are present. p= palynomorphs are present, but out of count. q= palynomorphs are present but the identification is questionable ### Supplementary remarks on conodonts from Svalbard.doc: Additional taxonomic notes on conodonts from the Stensiofjellet section, Svalbard For conodonts, we collected 17 samples, each weighing approximately 10kg, from section Stensiöfjellet C. Of the 17 samples, 11 were taken from the Lusitaniadalen Member and 6 from the Vendomdalen Member, with varying spacing between samples ranging from 1 m to 60 m. The samples were dissolved using a ~ 10% buffered acetic acid solution following the procedure described by Jeppsson *et al*. (1999). The residues were concentrated by using sodium polytungstate (Jeppsson & Anehus 1999) as a heavy liquid for separation. They were then sieved using a 0.075-mm mesh, and the heavy fraction was handpicked under a binocular microscope. The selected conodont elements were illustrated using a scattered electron microscope (SEM) (JEOL JSM-6010) without the use of a sputter coater, and a digital microscope (Keyence VHX 6000). The illustrations of the conodont elements can be found in the main document. This document provides additional systematic taxonomical notes on the species illustrated in the main document. The document provides largely a form-taxonomic, non-hierarchical presentation because of the biostratigraphic emphasis of the present work. Synonymy lists of each genus and species are provided as well as taxonomic remarks on each identified species. Furthermore, it is indicated in which figure in the main text the species description is referring to. Geological context: Sassendalen, central Spitsbergen, Svalbard, Norway. Smithian-Spathian, Vikinghøgda Formation, Lusitaniadalen and Vendomdalen Member. ## Access information The material is curated at the Paläontologisches Institut und Museum, Universität Zürich, Switzerland, and figured specimens have received catalog numbers from this institution.