Holotypic Occlupanid Research Group (HORG) (opens in new tab)
From the website:.......................................The Holotypic Occlupanid Research Group classified occlupanids by the shape of their oral groove.A sampling of standardized oral groove morphologies are presented here, in hopes of leading the enthusiastic occlupanidologist towards a positive ID of their specimen.Note that some taxonomic...
Read the original article