surface structure nuptial tubercle UBERON:2002124 Surface structure that is a small protuberance on the surface of the body. Nuptial tubercles primarily function to facilitate contact between individuals for breeding. breeding tubercle Nuptial tubercles may be keratinized or nonkeratinized. Also may function in territorial defense or stimulation of females in breeding. Definition reference: Wiley, M. L. and B. B. Collette. 1970. Breeding tubercles and contact organs in fishes: Their occurrence, structure, and significance. Bull Am Mus Nat Hist 143: 143-216. This class was sourced from an external ontology (teleost_anatomy). Its definitions, naming conventions and relationships may need to be checked for compatibility with uberon contact organ