From a small sediment sample from the base of a coralline scarp at 11 meters, at Monkey Shoals, Nevis, St. Kitts & Nevis, British West Indies on April 7, 2005 (1.99 mm.). Collected by Dr. Mike Loper in 300 mL grunge sample and culled by H.G. Lee. SEM produced  by Dr. Lee in collaboration with Dr. Ann Heatherington, Dept. Geological Sciences, University of Florida, Gainesville, FL. Also see: Caecum species B Fossil.

    Cochran Pit, Caloosahatchee Formation, LaBelle, Hendry County, Florida (2.10 mm.). SEMs produced in collaboration with Dr. Ann Heatherington, Dept. Geological Sciences, University of Florida, Gainesville, FL.