Americanus, a Latin adjective meaning American, may refer to.
The Jamaican poorwill (Siphonorhis americana), also known as the Jamaican pauraque or Jamaican least pauraqué, is a species of nightjar in the family Caprimulgidae.
Samolus valerandi is a species of water pimpernel native to a very wide area across Europe, Africa, Asia, Australia, and the Americas.
Schoenoplectus americanus (syn. Scirpus americanus) is a species of flowering plant in the sedge family known by the common names chairmaker's bulrush and Olney's three-square bulrush.
Scyllarus is a genus of slipper lobsters from the Atlantic Ocean, including the Mediterranean and Caribbean.
Spondylus is a genus of bivalve molluscs, the only genus in the family Spondylidae.
Spondylus americanus, the Atlantic thorny oyster, is a species of bivalve mollusc.
Storax or snowbell is the common names of StyraxEtymology: Ancient Greek styrax (στυραξ), the spike at the butt-end of a spear such as a xyston or a sarissa.
Styrax americanus, the American snowbell or mock-orange, is a plant species native to the southeastern United States and the Ohio Valley.
Symbion is the name of a genus of aquatic animals, less than 0.5 mm wide, found living attached to the bodies of cold-water lobsters.