Fig. 1: Neotype of Palaeocampa anthrax from Mazon Creek Lagerstätte.
From: Palaeocampa anthrax, an armored freshwater lobopodian with chemical defenses from the Carboniferous
a MCZ:IP:110208a, Overview of specimen. Faint red and blue grid lines from a wax pencil can still be seen across the specimen, made by the nineteenth century artist Katherine Pierson who illustrated pl. 26, Fig. 8 of27. b Detail of trunk, showing bases of some spine tufts and the sclerotized dermal papillae reinforcing the dorsum. c Detail of head, showing dorsal sclerite with septarian fractures115 and part of a small, secondary frontal appendage. d Longitudinal view of spines showing external ridges and other spines with interior exposed revealing the septa dividing inner segments of the spine. e Spines with jagged serrations projecting upward from the modified basement papillae. f Bases of spines emerging from modified basement papillae. g Crenellated, jagged terminus of one of the spines. crh, chemical residue halo; dss, dorsal sclerite spines; hs, head sclerite; lb, lobopod limb; lss, lateral sclerite spines; sha, secondary frontal appendage. Scale bars represent 5 mm in (a), 2 mm in (b) and (c), and 100 μm in d–g.
