Fig. 13From: A common arthropod from the Late Ordovician Big Hill Lagerstätte (Michigan) reveals an unexpected ecological diversity within ChasmataspididaHoplitaspis hiawathai, reconstruction. a Dorsal view. b Ventral view. The form of the first and second opercula are hypothetical and reconstructed based on comparison with Octoberaspis. Scale bar = 10 mmBack to article page