Caro Benigno Massalongo (25 March 1852, Verona, Austrian Empire – 18 March 1928, Verona) was an Italian botanist who specialized in the field of liverworts.
He was the son of paleontologist Abramo Bartolommeo Massalongo (1824-1860).
He studied botany at the University of Padua, receiving his PhD in 1873.
In 1878 he was named professor of botany at the University of Ferrara.
[2] He was among the first to conduct systematic and scientific studies of plant galls.