ESM S23 from <i>Waptia fieldensis</i> Walcott, a mandibulate arthropod from the middle Cambrian Burgess Shale

<i>Waptia fieldensis</i> Walcott, 1912 [10] from the middle Cambrian (Series 3, Stage 5) Burgess Shale, British Columbia, Canada. Movie by Lars Fields.