ˈbāsəˌnim, -sō- noun
( -s )
Etymology: baso- + -onym
: the earliest validly published name of a taxon, being in the case of a binomial or trinomial the source of the valid specific or subspecific epithet when the taxon is transferred to a new combination and in technical usage always accompanied by the name of the original author
Crataegus spicata Lamarck is the basonym of Amelanchier spicata