Google "IUPAB" and get http://www.google.com/search?hl=en&...nion+of+pure+and+applied+biology"&btnG=Search , a short list indicating very little activity. Is there some sort of professional standards group recommending practices and nomenclature in the life science fields? The specific question I have is, "Is there a 'standard' definition of femur length?" See http://www.loris-conservation.org/d...easurement/11a-figures_limb_measurements.html , "Leg measurements, primate standard, according to Schultz, 1929: Thigh length (length of femur): from trochanterium summum to femorale, parallel to the longitudinal axis of femur. Ischium-knee (Osman Hill, Phillips 1932). No exact definition given." There's ~5% difference in the two measurements which is the difference between two species between which I'm trying to distinguish, and my references don't specify a measurement protocol, hence the question about IUPAB; is there a "convention" that is understood by people in the life sciences that I can "safely" assume?