Fig. 5
From: Palaeontological and Molecular Evidence Linking Arthropods, Onychophorans, and other Ecdysozoa
Representative Cambrian taxa with frontal appendages (fa), variably assigned to the arthropod stem group in recent studies. aKerygmachela kierkegaardi, Sirius Passet Lagerstätte, Greenland (image courtesy of Graham Budd), showing annulated frontal appendages, segmental midgut glands (mg) and lateral flaps (fl); bAnomalocaris saron, Chengjiang Lagerstätte, China, detail of head, showing stalked eyes (e) and arthropodized frontal appendages; cLeanchoilia superlata, Burgess Shale, Canada (image courtesy of Diego GarcÃa-Bellido), with midgut glands (mg) preserved in relief, and showing strong setae (se) along margins of the outer limb branch as in marine crown group arthropods