Arrow flying squirrel

{{Short description|Species of rodent}}

{{Speciesbox

| image = Zoological researches in Java, and the neighbouring islands BHL47293136.jpg

| status = DD

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Gerrie, R. |author2=Kennerley, R. |author3=Koprowski, J. |name-list-style=amp |year=2019 |title=Hylopetes sagitta |page=e.T112296031A22241796 |doi=10.2305/IUCN.UK.2019-1.RLTS.T112296031A22241796.en |access-date=12 November 2021}}

| genus = Hylopetes

| species = sagitta

| authority = (Linnaeus, 1766)

| synonyms = * Sciurus sagitta {{small|Linnaeus, 1766}}

• Petinomys sagitta {{small|(Linnaeus, 1766)}}
• Pteromys lepidus {{small|Horsfield, 1824}}
• Hylopetes lepidus {{small|(Horsfield, 1824)}}

}}

The arrow flying squirrel (Hylopetes sagitta) is a species of flying squirrel. It is endemic to Java and Bangka, Indonesia. The population is unknown as it has only been collected from a few localities. It is nocturnal and arboreal and may be found in primary and secondary forest. It is threatened by forest loss due to logging and agriculture and there are no known conservation actions.

Phylogenetic evidence indicates that the grey-cheeked flying squirrel (H. lepidus), a widespread species described in 1822 and known from peninsular Thailand, Malaysia, Sumatra, Java and Borneo, is conspecific with this species.{{Cite journal|last1=Jackson|first1=Stephen M.|url=https://smithsonian.figshare.com/articles/book/Gliding_Mammals_Taxonomy_of_Living_and_Extinct_Species/9762035/1|title=Gliding Mammals: Taxonomy of Living and Extinct Species|last2=Thorington|first2=Richard W. Jr.|date=2019-09-11|journal=Smithsonian Contributions to Zoology|issue=638 |pages=1–117 |language=en|doi=10.5479/si.00810282.638.1}}{{Cite mdd |title=Hylopetes sagitta (Linnaeus, 1766)|id=1001629|access-date=2021-10-09}}