藝術與建築詞典根目錄
....代理者層面
........活體有機體
............真核生物 (域)
................動物界 (界)
....................脊索動物門 (門)
........................脊椎動物亞門 (亞門)
............................哺乳綱 (綱)
................................奇蹄目 (目)
....................................馬科 (科)
........................................馬屬 (屬)
............................................<依性別或年齡區分之馬>
................................................公馬
|||....................................................騸馬 (動物)
|||....................................................種馬 (繁殖用公馬)
................................................幼馬
|||....................................................小公馬
|||....................................................小母馬