 The antennae are minute (smaller than those of "Deckenia"), and the chelae (claws) are unequal in size.Whereas "Deckenia" has distinctly flattened walking legs, those of "Seychellum" are normal.Overall, Rathbun concluded that "Seychellum alluaudi" "differs from "Deckenia" [...] in so many other respects that the species are not likely to be confounded".