The material also includes a number of skull bones, vertebrae and ribs thought to stem from at least four individual snakes, all of which are stored at the Musée Edgard Clerc.

Boa blanchardensis has well laterally opening foramen on its superior dental canal and a bony outgrowth of the ectopterygoid bone matches with the postorbital.

The area where the ectopterygoid and pterygoid meet is marked by a prominent depression in the bone, which is surrounded by four lobes on its anterior, posterior, dorsal and ventral side.

The centra of the vertebrae in younger individuals are notably shorter and the bone between the articular processes is less constricted, as the prezygapophyses are oriented further forward and the postzygapophyses further back.

[1] While the majority of reptile fossils found in the cave deposits of Maria-Galante are thought to have been transported there as prey items of raptorial birds, there is no evidence to suggest that the same was the case for the remains of Boa blancharensis.

Since they lack any obvious signs of digestion or breakage, it is instead hypothesized that the snakes entered the caves not as prey but as predators, potentially feeding on roosting bats.

Besides the Pleistocene fossils from Maria-Galante, Holocene remains were discovered on the island of Antigua further north, while historical records indicate that boas were present on Martinique and Saint Vincent during the 18th, 19th and 20th century.

The historical reports from Martinique are additionally supported by the discovery of multiple snake vertebrae that appear to have been reworked into beads by the native human population.

This vertebrae, which has been found at an archaeological site and was clearly reworked by human hands, may not have originated on the island itself,[1] leaving the record of the genus from the main Guadeloupe archipelago ambiguous until further discoveries are made.

This vertebrae may serve as an additional indicator that boas could have once been present on the main islands, as during the Pleistocene La Désirade, Basse-Terre and Grande-Terre formed a single landmass.

The only other reptile previously thought to have disappeared from the island was a colubrid snake; however, its remains were later also discovered at a pre-Columbian archaeological site, pushing its extinction into the Holocene.

It is possible that the extinction of Boa blancharensis was tied to the change in climate towards the end of the Pleistocene, which heavily affected the native bat diversity and may have also influenced the local bird population.