I agree, but it is clear they got used to it. I suppose once you learn the endings, you can generate the higher genera from the name of a bottom level species familar to us like human-cat-dog / homo-felis-canis

Superfamily -oidea

  Hominoidea | Feloidea | Canoidea |

Family -idae

  Hominidae | Felidae | Canidae |

Subfamily -inae

  Homininae | Felinae (Small cats) | Caninae |

Tribe -ini

  Hominini | Felini | Canini |

Subtribe -ina

  Hominina | Felina | Canina |