Fig. 3: Camenellan juveniles from the Cambrian Salanygol Formation of Mongolia.
From: Exceptionally preserved early Cambrian bilaterian developmental stages from Mongolia
a Dorsal view of an early juvenile with six arc-shaped ridges preserving cellular pattern; anterior nascent sclerite with different morphology. b Close-up of central ridges C1–3 with cellular pattern, enlargement of individual shown in a. c Ventral view of the early juvenile shown in a, with six pairs of lateral protuberances. d Posterior view, posterior nascent sclerite forms a small field only in this ontogenetic stage. e Lateral view on right peripheral zone with six small lateral protuberances. f Dorsal view of an individual with shallow central ridges. g Posterior view, note left lateral nascent sclerite five forms an asymmetric cone. h Dorsal view of an early juvenile with six arc-shaped central ridges. i Anterior view of h showing anterior nascent sclerite developing a different morphology than central nascent sclerites 1–6. C1–6 central nascent sclerite 1–6 of medial zone, P posterior nascent sclerite, A anterior nascent sclerite, ll1–6 left lateral sclerites 1–6 of peripheral zone, rl1–6 right lateral nascent sclerites 1–6 of peripheral zone. All images are electron microscope micrographs, all images at same scale except for b. Specimen identifiers: a–d Sal 139-019; e, h, i Sal 133-029; f, g Sal 133-43.
