sentences:  Classified as part of the family Slimonidae alongside the related "Salteropterus", the genus contains three valid species, "S. acuminata" from Lesmahagow, Scotland, "S. boliviana" from Cochabamba, Bolivia and "S. dubia" from the Pentland Hills of Scotland and one dubious species, "S. stylops", from Herefordshire, England.The generic name is derived from and honors Robert Slimon, a fossil collector and surgeon from Lesmahagow.Out of the four described species of "Slimonia", three measured below or up to in length.