sentences:  Genital appendages were long and narrow in both males and females.The type species of "Slimonia", "S. acuminata", was first described as a species of "Pterygotus", ""Pterygotus acuminata"" ("acuminata" being Latin for "sharp" or "tapering"), by John William Salter in 1856, based on fossils recovered from deposits of Llandovery-Wenlock (Early to Middle Silurian) age in Lesmahagow, Scotland.That same year David Page erected a new genus to contain the species, as several distinctive characteristics made the species considerably different from other known species of "Pterygotus", among them the shape of the carapace and "S. acuminata" lacking the large cheliceral claws known from "Pterygotus".