Boana nigra

{{Short description|Species of frog}}

{{Speciesbox

| image =

| status =

| status_system =

| status_ref =

| taxon = Boana nigra

| authority = Caminer and Ron, 2020

| range_map =

| synonyms =

| synonyms_ref =

}}

Boana nigra, the black-flanked tree frog, is a frog in the family Hylidae. It is endemic to Ecuador. Scientists have seen it between 910 and 1847 meters above sea level.{{cite journal|access-date=August 10, 2021

|publisher=American Museum of Natural History|journal=Amphibian Species of the World 6.0, an Online Reference

|title=Boana nigra (Caminer and Ron, 2020)

|url=https://amphibiansoftheworld.amnh.org/Amphibia/Anura/Hylidae/Cophomantinae/Boana/Boana-nigra}}{{cite web|publisher=Amphibiaweb

|language=es

|author=Julio C. Carrión

|date=March 26, 2020

|url=https://amphibiaweb.org/species/9258

|title=Boana nigra

|access-date=August 10, 2021}}{{cite journal|author1=Marcel A. Caminer |author2= Santiago R. Ron |year=2020 |title=Systematics of the Boana semilineata species group (Anura: Hylidae), with a description of two new species from Amazonian Ecuador.|type=abstract |journal=Zoological Journal of the Linnean Society|volume=190|issue=1|pages=149–180|doi=10.1093/zoolinnean/zlaa002|accessdate=August 10, 2021|url=https://academic.oup.com/zoolinnean/article-abstract/190/1/149/5810752?redirectedFrom=fulltext|doi-access=free}}

The adult male frog measures 38.5 to 46.3 mm in snout-vent length and the adult female frog 56.4 to 76.7 mm. This frog is brown, reddish brown, or darn brown on the back with darker spots. It has black sides and black stripes. The webs on its feet are either black or bright orange.

This frog's English and scientific names come from the Latin word for "black".