Penion subrectus is an extinct species of marine snail or whelk, belonging to the true whelk family Austrosiphonidae.
Distribution Fossils of Penion subrectus were found in Patagonia.
References
External links Ihering, H. von. (1899). Die Conchylien der patagonischen Formation. Neues Jahrbuch für Mineralogie, Geoologie und Palaeontologie. Volume 2, pp. 1-54, pls 1-2