sentences:  The type specimen is a long adult female, caught in January 1988 north of Melville Island, Northern Territory.Within the genus, "G. gracilis" appears to be closely related to "G. eastmani", "G. longirostris", and "G. nipponensis".A 2005 phylogenetic analysis, based on mitochondrial and nuclear DNA, reported that this species, "G. eastmani", and "G. sauteri" formed a clade apart from "G. melastomus" and "G. murinus".