Trilobite collecting in Colorado Rockies - Ordivician (Manitou Dolomite) - 2/1/2003

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Possibly Leiostegium (Manitouella) ulrichi n. subgen. See Berg & Ross (1959), Plate 21, Fig 1. Cranidium. Probably lost during molt (when trilobite sheds its exoskeleton).
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Possibly Leiostegium (Manitouella) ulrichi n. subgen. See Berg & Ross (1959), Plate 21, Fig 1. Cranidium. Probably lost during molt (when trilobite sheds its exoskeleton).