Kalmar “genus” tana nufin rarrabuwar haraji da ake amfani da ita a cikin ilimin halitta don haɗa nau’ukan da ke da alaƙa ta kud da kud."Notornis" wani nau'in tsuntsaye ne marasa tashi da suka fito daga New Zealand. Tsuntsayen da ke cikin wannan jinsin ana kiransu da suna takahe. Suna da alaƙa da wani tsuntsu mara tashi, wato pukeko ko New Zealand swamp hen, kuma ana ɗaukan su cikin haɗari saboda asarar wurin zama da tsinuwa ta hanyar gabatar da dabbobi masu shayarwa.Don haka, ma'anar ƙamus na kalmar "Genus Notornis" zai kasance. zama rarrabuwa taxonomic wanda ya haɗa da tsuntsaye marasa tashi na nau'in takahe, 'yan ƙasar New Zealand.