Kalmar "genus" tana nufin nau'in harajin da ke sama da nau'in jinsi da ƙasa da iyali, kuma ana amfani da shi don rarraba ƙungiyoyin kwayoyin halitta masu dangantaka. "Dinornis" shine sunan asalin rukunin tsuntsaye marasa tashi da aka sani da moa, waɗanda suka kasance a New Zealand. Saboda haka, ma'anar ƙamus na "genus Dinornis" zai zama rabe-raben haraji na ƙungiyar tsuntsayen moa da batattu waɗanda ke cikin jinsin Dinornis.