Megalocentor echthrus

{{Short description|Species of fish}}

{{Speciesbox

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Brejão, G.L. |year=2023 |title=Megalocentor echthrus |volume=2023 |page=e.T49829772A159914384 |doi=10.2305/IUCN.UK.2023-1.RLTS.T49829772A159914384.en |access-date=9 April 2025}}

| genus = Megalocentor

| parent_authority = de Pinna & Britski, 1991

| species = echthrus

| display_parents = 3

| authority = de Pinna & Britski, 1991

}}

Megalocentor echthrus is a species of catfish (order Siluriformes) of the family Trichomycteridae, and the only species of the genus Megalocentor.{{cite journal|url=http://silurus.acnatsci.org/ACSI/library/biblios/2007_Ferraris_Catfish_Checklist.pdf|title=Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types|first=Carl J. Jr.|last=Ferraris|journal=Zootaxa|volume=1418|pages=1–628|year=2007|doi=10.11646/zootaxa.1418.1.1 }} This fish grows to about {{convert|8.8|cm}} SL and originates from the Amazon and Orinoco basins.{{FishBase|genus=Megalocentor|species=echthrus|year=2012|month=February}}