The type of a genus or subgenus is a species. This genus has been progressively subdivided into a hierarchy of subgenus, section, subsection, and species. Taxonomic units between subgenus and species are not currently recognised as official zoological names. He placed it in the monotypic subgenus "Anourosperma". The sweetbay magnolia has been hybridized horticulturally with a number of species within subgenus Magnolia. Many cherries are allied to the subgenus "Prunus" subg. The first major clade corresponds to subgenus "Lavendula", and the second "Fabricia". The frequently showy pair of bracts of "Euphorbia" species in subgenus "Lacanthis" are the cyathophylls. Walter Tennyson Swingle segregated these species into a separate subgenus, "Papeda". Bombus lapidarius is a species of bumblebee in the subgenus "Melanobombus". In 1997, G. Valkiunas reclassified the bird-infecting "Plasmodium" species adding a fifth subgenus&colon; "Bennettinia". One species is recognized in the subgenus "Megapis". A third former subgenus, "Procapra", includes three living species of Asian gazelles. It is also the type species for the subgenus. Species which are not placed in a subgenus at this time.