Reconstruction of a Middle Devonian coral reef. Included here are a Siphonophrentis gigantea coral (tall organism at right), a cluster of Heterophrentis prolifica corals (white at right), a Michelinoceras nautiloid (smooth long shell at bottom centre), a Terataspis grandis trilobite (spiky at bottom centre), a cluster of Eridophyllum corals (yellow at left) and a crinoid (green at upper left). Field Museum, Chicago.
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