Gittings, S.R.Dennis, G.D.Harry, H.W.2010-02-152010-02-151986http://hdl.handle.net/1969.3/2108636 pages; available for download at the link below.The 49 species of thoracican barnacles (the goose and acorn barnacles) that are known to occur in the northern Gulf of Mexico are differentiated by a taxonomic key based on external characters, with extensive illustrations and a glossary. The guide also includes an annotated list of those species and three systematically questionable ones, with areal range, bathymetry, substratum type and other data; a list of 16 species that have been found in the southern gulf of Mexico but not in the nothern Gulf; directions for collecting and examining specimens; and a list of references especially useful for further study of particular groups.barnaclesbathymetrysubstratacollectionsTechnical Report