Nusufamilia (kwa Kilatini: subfamilia, wingi subfamiliae) katika uainishaji wa kisayansi ni ngazi ya kati chini ya familia lakini juu ya jenasi. Majina sanifu ya kundi hilo yanaishia "-oideae" katika mimea, na "-inae" katika wanyama. (2012) International Code of Nomenclature for algae, fungi, and plants (Melbourne Code) adopted by the Eighteenth International Botanical Congress Melbourne, Australia, July 2011 Regnum Vegetabile 154. A.R.G. Gantner Verlag KG. ISBN 978-3-87429-425-6.  Article 19. International Commission on Zoological Nomenclature (1999). "Article 29.2. Suffixes for family-group names", International Code of Zoological Nomenclature, Fourth, International Trust for Zoological Nomenclature, XXIX, 306.