ESM S1-S20,ESM 22 from Waptia fieldensis Walcott, a mandibulate arthropod from the middle Cambrian Burgess Shale

S1- W. fieldensis, geographic and stratigraphic distribution. S2- Nebalia bipes (Phyllocarida), decay experiments. S3- W. fieldensis, fossil assemblage. S4- W. fieldensis, synonymy list. S5- W. fieldensis, type specimens. S6- W. fieldensis, measurements (1). S7- Nebalia bipes (Phyllocarida), morphology. S8- W. fieldensis, frontal part. S9- Vargula hilgendorfii (Ostracoda), labrum. S10- Cirolana harfordi (Isopoda), mandibles. S11- W. fieldensis, mandibles and maxillules. S12- W. fieldensis, post-maxillular cephalothoracic appendages. S13- W. fieldensis, post-maxillular cephalothoracic appendages (frontal view). S14- W. fieldensis, lamellate appendages. S15- Crangon crangon (Decapoda), gills. S16- W. fieldensis, measurements (2). S17- W. fieldensis, digestive system (1). S18- W. fieldensis, digestive system (2). S19- Cladogram (adult taxa). S20- List of characters. S22- Cladogram (larval and adult taxa).