This species is often found in Explorers Cove, a relatively quiet and undisturbed area on the coast of the Ross Sea. Image courtesy of Gudmundur Gudmundsson, Icelandic Institute and Museum of Natural History. This image was originally published in J. Foram. Res. 32:308-318, and is used with permission.
Notice the prominent ridge along the outside of the coil, which gives this species its name. Image courtesy of Gudmundur Gudmundsson, Icelandic Institute and Museum of Natural History. This image was originally published in J. Foram. Res. 32:308-318, and is used with permission.