Plaxiphora boydeni is a small uncommon chiton in the family Mopaliidae, endemic to the East Coast of the South Island, New Zealand, Stewart Island and the Chatham and Subantarctic Islands.
Description and habitat A flat oval chiton with an undistinguished appearance and no distinct markings on the eroded valves apart from the occasional white blotch. Girdle narrow, cream to mid-brown, also with occasional white blotches, covered in nodules. Usually attached to open rock surfaces on wave-exposed shores in the mid to low intertidal zone.
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