Designation of a lectotype for Helix iuloidea Forbes, 1852 and a history of the citation of the invalid name Helix juloidea for this species by various authors (Gastropoda: Eupulmonata: Charopidae)

Abstract

Two syntypes of the mid-east Queensland charopid, Helix iuloidea Forbes, 1852, presumed to be mis-placed, were located by the author in the mollusc collections of the Natural History Museum, London. These specimens had been mistakenly catalogued under the name Helix juloidea. The historical use of H. juloidea in 19th and early 20th century malacological literature is detailed and possible origin of this invalid name is proposed. A lectotype for Helix iuloidea Forbes, 1852 is designated herein.