Labels:animal | text | invertebrate OCR: 400 MYA MUCROSPIRIFER THIS MUCROSPIRI FER, or butterfly shell, is a brachiopod, a type of marine animal with two shells. There were a great number of brachiopods in the Devonian Period, although there are very few living species today. Mucrospirifers lived on the muddy seabed and fed by filtering tiny creatures from the water. LONG HINGE GROWTH LINES SHELL STRUCTURE This is one half of a mucrospirifer shell. Hinged together, the two halves open to take in food. I RADIATING RIBS
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