never observed by Europeans; fossils contemporary with indigenous artifacts indicate survival into colonial era, possibly until 16th Century
ground-dwelling montane forest herbivore endemic to Puerto Rico
fossil specimens in Washington
disappeared after deforestation
References:
Allen, G. M. Extinct and Vanishing Mammals of the Western Hemisphere QL715.A44 1942 p.123
Williams, J. and Nowak, R. chapter in The Last Extinction QH75.L36 1993 pp. 107-139
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