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Archaeoindris fontoynontii is an extinct giant lemur and the largest primate known to have evolved on Madagascar, comparable in size to a male gorilla.It belonged to a family of extinct lemurs known as "sloth lemurs" (Palaeopropithecidae) and, because of its extremely large size, it has been compared to the ground sloths that once roamed North and South America.
They include both extant and extinct species, although the term more frequently refers to the extinct giant lemurs. The diversity of subfossil lemur communities was greater than that of present-day lemur communities, ranging to as high as 20 or more species per location, compared with 10 to 12 species today.
The arms were longer than the legs, but no hand or foot bones have been found for comparison with the other sloth lemurs. Size estimates based on the limited remains have varied widely, ranging as high as 244.1 kg (538 lb), but the most thorough statistical investigation estimates a mass of 160 kg (350 lb).
Ranging in size from the 30 g (1.1 oz) Madame Berthe's mouse lemur, probably the world's smallest primate, [2] to the extinct 160–200 kg (350–440 lb) Archaeoindris fontoynonti, the largest known prosimian, [3] [4] [5] lemurs evolved diverse forms of locomotion, varying levels of social complexity, and unique adaptations to the local climate.
Archaeolemur is one of the most common and well-known of the extinct giant lemurs as hundreds of its bones have been discovered in fossil deposits across the island. [ 4 ] [ 5 ] It was larger than any extant lemur, with a body mass of approximately 18.2–26.5 kg (40–58 lb), and is commonly reconstructed as the most frugivorous and ...
They range in size from the Margot Marsh's mouse lemur, at 8 cm (3 in) plus a 11 cm (4 in) tail, to the indri, at 90 cm (35 in) plus a 6 cm (2 in) tail. Lemuroids primarily eat fruit, leaves, and insects.
Ranging in size from the 30 g (1.1 oz) Madame Berthe's mouse lemur, the world's smallest primate, [48] to the extinct 160–200 kg (350–440 lb) Archaeoindris fontoynonti, [49] lemurs evolved diverse forms of locomotion, varying levels of social complexity, and unique adaptations to the local climate.
In 1953, William Charles Osman Hill noted that the skull of both P. insignis and P. jullyi (then called Lemur insignis and L. jullyi) resembled that of ruffed lemurs more so than the rest of the lemurs classified in the genus Lemur at that time. [5] Because of the similarities, Pachylemur is sometimes referred to as a giant ruffed lemur. [6]