Colomesus tocantinensis

{{Short description|Species of pufferfish}}

{{Speciesbox

| image = Colomesus asellus from the Lajeado reservoir (2 of 2) (cropped).png

| image_caption = Tocantins, Brazil, scale bar = 1 cm

| taxon = Colomesus tocantinensis

| authority = Amaral, Brito, Silva & Carvalho, 2013

}}

Colomesus tocantinensis{{Cite web|title=ITIS - Report: Colomesus tocantinensis|url=https://www.itis.gov/servlet/SingleRpt/SingleRpt;jsessionid=267ED4AF5F1ACA3908A3122E5375AE90?search_topic=TSN&search_value=1054605#null|access-date=2022-01-19|website=www.itis.gov}} is a species of pufferfish in the family Tetraodontidae. It is endemic to Brazil, where it inhabits the Tocantins River basin. It reaches a length of 3.5 cm (1.4 inches) SL.{{Cite web|date=2021|editor-last=Froese|editor-first=Rainer|editor2-last=Pauly|editor2-first=Daniel|title=Colomesus tocantinensis|url=https://www.fishbase.de/summary/69136|url-status=live|website=FishBase|archive-url=https://web.archive.org/web/20220119230145/https://www.fishbase.de/summary/69136 |archive-date=2022-01-19 }} The species was described in 2013 by Cesar R. L. Amaral, Paulo M. Brito, Dayse A. Silva, and Elizeu F. Carvalho based on morphology and genetic evidence, both of which separate it from its congeners Colomesus asellus and C. psittacus.Amaral, Cesar R L et al. “A new cryptic species of South American freshwater pufferfish of the genus Colomesus (Tetraodontidae), based on both morphology and DNA data.” PLOS ONE vol. 8,9 e74397. 11 Sep. 2013, doi:10.1371/journal.pone.0074397