DOI: 10.5061/dryad.70rxwdbvc
title: Data from: Small Carbonaceous Fossils (SCFs) from North Greenland: new light on metazoan diversity in early Cambrian shelf environments

description: The Sirius Passet Lagerstätte of North Greenland provides one of the
 oldest records of soft-bodied metazoan-dominated ecosystems from within
 the early Cambrian. The Lagerstätte site itself is restricted to just a
 single ~1 km-long outcrop located offshore from the shelf margin, in an
 area that has been affected by metamorphic alteration during the
 Ellesmerian Orogeny (Devonian–Early Carboniferous). The recent recovery of
 Small Carbonaceous Fossils (SCFs) to the south in areas that have escaped
 the effects of this deformation has substantially expanded the known
 coverage of organic preservation into shallower-water depositional
 settings in this region. Here we describe additional SCF assemblages from
 the siliciclastic shelf succession of the Buen Formation (Cambrian Series
 2, Stages 3-4; ∼ 515 Ma), expanding upon the previously documented SCF
 biota. Newly recovered material reveals a rich diversity of
 non-mineralizing metazoans, chiefly represented by arthropod remains.
 These include the filtering and grinding elements of a sophisticated
 crustacean feeding apparatus - the oldest crustacean remains reported to
 date - alongside an assortment of bradoriid sclerites, including almost
 complete, three-dimensional valves which tie-together a number of SCFs
 previously found in isolation. Other metazoan remains include various
 trilobite cuticles, diverse scalidophoran sclerites, and a range of
 metazoan fragments of uncertain affinities. This shallower-water
 assemblage differs substantially from the Sirius Passet biota, which is
 dominated by problematic euarthropod stem-group members and sponges.
 Though some of these discrepancies are attributable to taphonomic or
 temporal factors, these lateral variations in taxonomic composition also
 point to significant palaeoenvironmental and/or palaeoecological controls
 on early Cambrian metazoan communities.
description: SCF
 extraction and study techniques follow those outlined in Butterfield and
 Harvey (2012). About 50g of each sample was macerated
 in hydrofluoric acid to recover organic residues. Individual SCFs were
 hand-picked and mounted for light microscopy. Figured specimens are
 deposited in the Museum of Evolution, Uppsala, Sweden.
description: The dataset includes a series of folders containing
 high-resolution images of specimens figured in Wallet et al. (2020),
 together with two tabular files
 ('Wallet_et_al._2020_CollectionData.csv' and
 'Wallet_et_al._2020_CollectionData.xlsx') presenting
 sampling/collection information for these specimens.
 The names of folders and their constitutive files refer to the
 figures of Wallet et al. (2020).<br> Within each folder, specimens
 were classified based on morphogroups outlined in Wallet et al. (2020).
 When available, additional specimens which were not included in Wallet et
 al. 2020 were added together with specimens of their corresponding
 morphogroup, and were given letters following the alphabetic sequence of
 figures in Wallet et al. (2020).<br> Specimens that were allocated a
 letter followed by a prime (e.g. Fig.8A') correspond to specimens
 figured in Wallet et al. 2020 but photographed using a higher
 magnification objective (x100). File List:
 Wallet_et_al._2020_CollectionData.csv<br>
 Wallet_et_al._2020_CollectionData.xlsx
 Wallet_et_al._2020_Fig.2.zip<br>     Fig.2A-L.tif<br>
     Fig.2M-Q.tif<br>     Fig.2R.tif<br>   
  Fig.2S-U.tif<br>     Fig.2V-X,Z.tif<br>   
  Fig.2Y.tif <br>
 Wallet_et_al._2020_Fig.3.zip<br>     Fig.3A-M.tif<br>   
  Fig.3N-S.tif<br>     Fig.3T-Z.tif<br>   
  Fig.3AA-AE.tif <br>
 Wallet_et_al._2020_Fig.4.zip<br>     Fig.4A.tif<br>   
  Fig.4B-C.tif <br>
 Wallet_et_al._2020_Fig.5.zip<br>     Fig.5.tif
 <br> Wallet_et_al._2020_Fig.6.zip<br>   
  Fig.6A-F.tif<br>     Fig.6G-U.tif<br>   
  Fig.6V-AF.tif <br>
 Wallet_et_al._2020_Fig.7.zip<br>     Fig.7.tif
 <br> Wallet_et_al._2020_Fig.8.zip<br>   
  Fig.8A-C.tif<br>     Fig.8D,K,F.tif<br>   
  Fig.8D-M.tif<br>     Fig.8N-Q.tif<br>   
  Fig.8P.tif<br>     Fig.8R,S.tif <br>
 Wallet_et_al._2020_Fig.9.zip<br>     Fig.9A-S.tif<br>   
  Fig.9T-Y.tif<br>     Fig.9Z-AH.tif<br>   
  Fig.9AI-AO.tif<br>     Fig.9AP-AS.tif<br>   
  Fig.9AT-AX.tif <br>
 Wallet_et_al._2020_Fig.10.zip<br>     Fig.10A-I.tif<br>   
  Fig.10J-S.tif <br>
 Wallet_et_al._2020_Fig.11.zip<br>     Fig.11A.tif<br>   
  Fig.11A-G.tif<br>     Fig.11G.tif<br>   
  Fig.11H.tif <br>
 Wallet_et_al._2020_Fig.12.zip<br>     Fig.12A-D.tif<br>   
  Fig.12E-Q.tif<br>     Fig.12R-X.tif<br>   
  Fig.12Y-AD.tif<br>     Fig.12AE-AL.tif
 <br> Wallet_et_al._2020_Fig.13.zip<br>   
  Fig.13.tif <br>
 Wallet_et_al._2020_Fig.14.zip<br>     Fig.14A-N.tif<br>   
  Fig.14O-T.tif<br>     Fig.14U-AC.tif<br>   
  Fig.14AD-AL.tif<br>     Fig.14AM.tif<br>   
  Fig.14AN-AQ.tif<br>     Fig.14AR-AU.tif