Project 3217: J. Vannier, C. Aria, R. S. Taylor, J. Caron. 2018. Waptia fieldensis Walcott, a mandibulate arthropod from the middle Cambrian Burgess Shale. Royal Society Open Science. 5 (6):172206.
Specimen: † Waptia fieldensis (unvouchered)
View: fossilized exoskeleton

Abstract

Waptia fieldensis Walcott, 1912 is one of the iconic animals from the middle Cambrian Burgess Shale biota that had lacked a formal description since its discovery at the beginning of the twentieth century. This study, based on over 1800 specimens, finds that W. fieldensis shares general characteristics with pancrustaceans, as previous authors had suggested based mostly on its overall aspect. The cephalothorax is covered by a flexible, bivalved carapace and houses a pair of long multisegmented antennules, palp-bearing mandibles, maxillules, and four pairs of appendages with five-segmented endopods?the anterior three pairs with long and robust enditic basipods, the fourth pair with proximal annulations and lamellae. The post-cephalothorax has six pairs of lamellate and fully annulated appendages which appear to be extensively modified basipods rather than exopods. The front part of the body bears a pair of stalked eyes with the first ommatidia preserved in a Burgess Shale arthropod, and a median ?labral? complex flanked by lobate projections with possible affinities to hemi-ellipsoid bodies. Waptia confirms the mandibulate affinity of hymenocarines, retrieved here as part of an expanded Pancrustacea, thereby providing a novel perspective on the evolutionary history of this hyperdiverse group. We construe that Waptia was an active swimming predator of soft prey items, using its anterior appendages for food capture and manipulation, and also potentially for clinging to epibenthic substrates.


Read the article »

Article DOI: 10.1098/rsos.172206

Project DOI: 10.7934/P3217, http://dx.doi.org/10.7934/P3217
This project contains
  • 1 Media
  • 2 Documents
  • 3 Taxa
  • 1 Specimen
Total size of project's media files: 2 MB

Download Project SDD File
Currently Viewing:
MorphoBank Project 3217
  • Creation Date:
    29 June 2018
  • Publication Date:
    31 July 2018
  • Project views: 1113


    Members

    member name taxa specimens media
    Tanya Berardini
    Project Administrator
    Last logged in 07/31/18
    311
    MorphoBank Curator
    Full membership
    Last logged in Never
    000


    Project has no matrices defined.



    Project views

    type number of views Individual items viewed (where applicable)
    Total project views1113
    Project overview279
    Media views297Media search (247 views); M584840 (50 views);
    Bibliography63
    Taxon list136
    Views for media list88
    Specimen list149
    Documents list101




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project22
    Project downloads22