No abstract

An illustrated catalogue of the Palaearctic types of species and subspecies described by Walter Linsenmaier in the genus Hedychridium Abeille de Perrin, 1878 is given. Linsenmaier described 110 species and subspecies of Hedychridium, most of the holotypes are deposited in his collection, at the Natur-Museum (Luzern, Switzerland), with the exception of 25 holotypes which are deposited at the Bristish Museum (London), at the Musée cantonal de zoologie (Lausanne) and in two private collections. Hedychridium atratum is here transferred to Chamaeholopyga Linsenmaier, 1987. Hedychridium krajniki turceyense Linsenmaier, 1968 stat. nov. is upgraded to species rank. The holotype of Hedychridium caireanum Linsenmaier, 1968 is considered lost. A list of the species described and a synthesys of his classification is given. Pictures of 83 primary and secondary types are presented.

In this work, the presence of species of the slug family Milacidae in Switzerland was investigated by using the barcoding marker cytochrome c oxidase subunit I (COI) as well as traits of the body and the genital organs. Currently, three species of Tandonia living in Switzerland in established populations could be reported, i.e., T. rustica, T. budapestensis, and T. nigra. The three records of Milax gagates were re-investigated, but only for one of these records could the identification be reconfirmed. This species has currently no established and thriving population in Switzerland. For all species recorded, detailed descriptions of body morphology, genital anatomy, and distribution data are provided based on the investigated Swiss animals. An unknown pale colour morph of a Tandonia sp. from Canton Ticino could be identified as T. nigra, and the barcodes of T. nigra specimens were submitted to GenBank for the first time. The identity of the Italian and Austrian populations of T. nigra from the Bergamasque Alps and north Tirol is evaluated. Observations on details of the morphology of the genital organs in T. rustica vs. T. kusceri are discussed.

An illustrated catalogue of the Palaearctic types of Cleptes species and subspecies described by Walter Linsenmaier is given. All types are currently housed at the Natur-Museum, Luzern, Switzerland. Cleptes laevifacies Linsenmaier, 1999 is confirmed as a member of  the nitidulus species group.

An illustrated catalogue of the Palaearctic types of species and subspecies described by Walter Linsenmaier in the genus Hedychrum Latreille, 1802 is given. Linsenmaier described 14 taxa of Hedychrum; almost all primary types are deposited in the collection, at the Natur Museum (Luzern, Switzerland), with the exception of two holotypes which are deposited at the Natural History Museum (London), and Naturalis (Leiden). Hedychrum mithras Semenov-Tian-Shanskij, 1967 spec. resurr. is revalidated from the previous synonymy with Hedychrum luculentum bytinskii Linsenmaier, 1959. A list of the species described and pictures of the holotypes and allotypes deposited in the collection are given.