Chilean botanist (1898-1982).
Gualterio Looser Schallemberg (September 4, 1898, Santiago – July 22, 1982) was a Chilean botanist and engineer of Swiss descent. He owned a factory that made agricultural implements. In 1928, Looser joined the American Fern Society, and started to publish papers on the pteridophytes of Chile. His herbarium containing approximately 8000 specimens was given to the Geneva Botanical Garden.