Platystomatichthys

{{Short description|Genus of fishes}}

{{Speciesbox

| name = Sturgeon catfish

| image =PSM V68 D524 Platystomatichthis sturio one of the giant catfish.png

| image_caption = specimen

| genus = Platystomatichthys

| parent_authority = Bleeker, 1862

| species = sturio

| authority = (Kner, 1858)

| synonyms =

Platystoma sturio
Kner, 1857

}}

Platystomatichthys sturio is the only species in the genus Platystomatichthys of the catfish (order Siluriformes) family Pimelodidae.{{ITIS |id=681791 |taxon=Platystomatichthys sturio |accessdate=May 23, 2007}} It is sometimes called the sturgeon catfish.{{cite book|title=Exotic Tropical Fishes|last=Axelrod|first=Herbert R.|authorlink=Herbert R. Axelrod|author2=Emmens, C. |author3=Burgess, W. |author4=Pronek, N. |publisher=T.F.H. Publications|year=1996|isbn=0-87666-543-1}} This species occurs in the Amazon Basin and reaches a length of about {{convert|40.0|cm|in}} TL.{{FishBase|genus=Platystomatichthys|species=sturio|year=2012|month=February}} Platystomatichthys is classified under the "Calophysus-Pimelodus clade". Within this clade, it is considered a part of the "Pimelodus-group" of Pimelodids, which also includes Pimelodus, Exallodontus, Duopalatinus, Cheirocerus, Iheringichthys, Bergiaria, Bagropsis, Parapimelodus, Platysilurus, and Propimelodus.{{cite journal|url=http://www.bioone.org/archive/0097-3157/152/1/pdf/i0097-3157-152-1-75.pdf|title=Propimelodus, new genus, and redescription of Pimelodus eigenmanni Van der Stigchel 1946, a long-recognized yet poorly-known South American catfish (Pimelodidae: Siluriformes)|last=Lundberg|first=John G.|author2=Parisi, Béatrice M. |journal=Proceedings of the Academy of Natural Sciences of Philadelphia|volume=152|issue=1|pages=75–88|year=2002|doi=10.1635/0097-3157(2002)152[0075:PNGARO]2.0.CO;2|s2cid=86213152 }}