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loris, name for slow-moving, nocturnal, arboreal primates of the family Lorisidae, found in India, Sri Lanka, and SE Asia. Lorises have round heads, large round eyes, and furry bodies. They have no tails, and their index fingers are vestigial. Lorises move hand over hand through the trees, gripping the branches firmly with hands and feet; they feed on insects and vegetable matter. Best known are the slender loris (Loris tardigradus), with an 8-in.-long (20-cm) body and very thin legs, and the slow loris (Nycticebus coucang), with a 16-in.-long (40-cm) body and short, thick legs. The slow loris has pale brownish fur with a darker dorsal stripe. African members of the loris family are the potto (Perodicticus potto), which has a stumpy tail, the angwantibo (Arctocebus calabarensis), characterized by its pointed face, and the bush babies, or galagos, a distinctive group of small, swift-moving animals. Lorises are classified in the phylum Chordata, subphylum Vertebrata, class Mammalia, order Primates, family Lorisidae.
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