Beccarii, a specific epithet honouring Italian botanist Odoardo Beccari, may refer to:
Plants Aglaia beccarii, a tree in the family Meliaceae Bulbophyllum beccarii, an orchid in the family Orchidaceae Dacrydium beccarii, a conifer in the family Podocarpaceae Dryobalanops beccarii or Kapur Keladan, a tree in the family Dipterocarpaceae Haplolobus beccarii, a plant in the family Burseraceae Holochlamys beccarii, a plant in the family Araceae Musa beccarii, a wild banana in the family Musaceae Myrmecodia beccarii, a plant in the family Rubiaceae Palaquium beccarianum, a tree in the family Sapotaceae Palaquium beccarii, a tree in the family Sapotaceae
Animals Acanthopelma beccarii, a tarantula Clinidium beccarii, a ground beetle in the family Carabidae Cochoa beccarii, a bird in the family Turdidae Conraua beccarii, a frog in the family Ranidae Crocidura beccarii, a shrew in the family Soricidae Emballonura beccarii, a bat in the family Emballonuridae Gallicolumba beccarii, a bird in the family Columbidae Margaretamys beccarii, a rat in the family Muridae Mormopterus beccarii, a bat in the family Molossidae Otus beccarii, an owl in the family Strigidae Scopula beccarii, a moth in the family Geometridae Sericornis beccarii, a bird in the family Acanthizidae Varanus beccarii, a monitor lizard in the family Varanidae