Published online by Cambridge University Press: 14 July 2015
Spectacular exposures of large, upright, vase- to barrel-shaped, late Pleistocene sponges are dramatically exposed as part of the Miami Limestone along margins of the C-100C Canal in east-central Miami-Dade County, southeastern Florida. the discovery of this sponge reef by K. J. Cunningham was made in 2004, during a routine drive across the bridge above the C-100C Canal on S.W. 97th Avenue in Miami-Dade County, southeastern Florida. A second location, where comparable sponges are exposed in walls of a burrow lake, was also discovered by K. J. Cunningham in 2004 upon visiting the site after personal communication with L. Noblick, Montgomery Botanical Center, and S. Zona, Fairchild Tropical Botanic Garden, about similarly shaped geologic structures. Subsequently, the C-100C Canal location was documented and some of the sponges were collected and thin sections and samples were sent to J. K. Rigby for examination and evaluation. This paper, on the description and possible taxonomy of the sponges, is a result of that joint effort.