Kalmar "Genus" tana nufin nau'in harajin haraji wanda ake amfani da shi a cikin rarrabuwar halittu don haɗa nau'ikan nau'ikan da ke da alaƙa. , kimanin shekaru miliyan 150 da suka wuce. Ana kiran waɗannan dabbobi da sunan pterosaurs, kuma an san su da manyan kwanyarsu masu tsayi da fikafikai masu tsayi har ƙafa 33 (mita 10).Saboda haka, ma'anar ƙamus na kalmar "Genus Pterodactylus" zai kasance. zama rarrabuwa taxonomic na gungun dabbobi masu rarrafe masu tashi da batattu waɗanda aka sani da pterosaurs, waɗanda ke da manyan kwanyarsu da fiffike masu ban sha'awa.