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Waptia fieldensis Walcott, a mandibulate arthropod from the middle Cambrian Burgess Shale
Vannier, Jean1; Aria, Cedric2,5; Taylor, Rod S.3,4; Caron, Jean-Bernard5,6,7

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-eilipsoid 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 epibentic substrates.

KeywordBurgess Shale Cambrian Arthropoda Mandibulata Crustacea Waptia
Indexed BySCI
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000437210500031
PublisherROYAL SOC
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Document Type期刊论文
Affiliation1.Univ Lyon 1, Univ Lyon, ENS Lyon, CNRS,UMR LGL TPE 5276, Batiment Geode 2,Rue Raphael Dubois, F-69622 Villeurbanne, France;
2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, 39 East Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China;
3.Manuels River Hibernia Interpretat Ctr, 7 Concept Bay South Highway, Cbs, NF A1W 3A2, Canada;
4.Mem Univ Newfoundland, Dept Earth Sci, St John, NF A1B 3X5, Canada;
5.Royal Ontario Museum, Palaeobiol Sect, Dept Nat Hist, 100 Queens Pk, Toronto, ON M5S 2C6, Canada;
6.Univ Toronto, Dept Ecol & Evolutionary Biol, Toronto, ON M5S 3B2, Canada;
7.Univ Toronto, Dept Earth Sci, Toronto, ON M5S 3B1, Canada
Recommended Citation
GB/T 7714
Vannier, Jean,Aria, Cedric,Taylor, Rod S.,et al. Waptia fieldensis Walcott, a mandibulate arthropod from the middle Cambrian Burgess Shale[J]. ROYAL SOCIETY OPEN SCIENCE,2018,5(6):1-51.
APA Vannier, Jean,Aria, Cedric,Taylor, Rod S.,&Caron, Jean-Bernard.(2018).Waptia fieldensis Walcott, a mandibulate arthropod from the middle Cambrian Burgess Shale.ROYAL SOCIETY OPEN SCIENCE,5(6),1-51.
MLA Vannier, Jean,et al."Waptia fieldensis Walcott, a mandibulate arthropod from the middle Cambrian Burgess Shale".ROYAL SOCIETY OPEN SCIENCE 5.6(2018):1-51.
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