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Today, Diploglossine lizards (Anguidae) are common on the Greater Antillean Islands (West Indies), where they are represented by many endemic species. However these lizards are very rare on the Lesser Antillean Islands, where they are only represented by a single species, the Montserrat galliwasp ( Diploglossus montisserrati ). Here, we show that diploglossine lizards were present in the past on other Lesser Antillean islands, by reporting the discovery of Anguidae fossil remains in two Amerindian archaeological deposits and in a modern deposit. These remains are compared to skeletons of extant diploglossine lizards, including  D. montisserrati , using X-ray microtomography of the type specimen of this critically endangered lizard. We also conducted a histological study of the osteoderms in order to estimate the putative age of the specimen. Our results show that the fossil specimens correspond to a member of the  Diploglossus  genus presenting strong similarities, but also minor morphological differences with  D. montisserrati , although we postulate that these differences are not sufficient to warrant the description of a new species. These specimens, identified as  Diploglossus  sp., provide a new comparison point for the study of fossil diploglossine lizards and reflect the historical 17 th  century mentions of anguid lizards, which had not been observed since.

A fossil Diploglossus (Squamata, Anguidae) lizard from Basse-Terre and Grande-Terre Islands (Guadeloupe, French West Indies)