Americanus, a Latin adjective meaning American, may refer to.
Gavialosuchus is an extinct tomistomine from the late Oligocene and Miocene of eastern North America and early Miocene of Europe.
Glugea is a genus of microsporidian parasites, predominantly infecting fish.
Gyrocarpus is a small genus of flowering plants in the Hernandiaceae family with a wide pantropical distribution.
Gyrocarpus americanus is a flowering plant in the Hernandiaceae family, with a wide pantropical distribution.