Galidia decemlineata was the scientific name used by Alfred Grandidier in 1867 for a mongoose collected on the west coast of Madagascar.

[5] The narrow-striped mongoose is part of the Malagasy carnivore family Eupleridae that forms a monophyletic clade.

[6] The narrow-striped mongoose is diurnal and lives in matriarchal family groups that practice cooperative rearing of young.

[8] The narrow-striped mongoose forages in top soil, ground litter and rotten wood from fallen trees.

Evidence showed that its diet included reptile egg membrane, bones, feathers and fragments of arthropods.

It forages in top soil, ground litter, and rotten wood from fallen trees, which shows how insect larvae could be considered a staple part of its diet.

[9] The narrow-striped mongoose is currently classified as Endangered on the IUCN Red List because it occurs in a severely fragmented area and is threatened by habitat loss due to logging and conversion to agriculturally used land.