Figures 16–23.
Head, full-face view, and pronotum, dorsal view, of Bolboceras: 16–19 Bolboceras inaequale (16–17 major specimen from Kolkata 18–19 minor specimen from Dhanjuri) 20–21 duplicatum,holotype 22–23 orissicum,holotype. Scale lines 1 mm.
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