A checklist, including all the cestode taxa recorded from Switzerland, their hosts, as well as deposited specimens available in scientific collections, is provided. The country has one of the richest European cestode faunas consisting of 251 species, almost all of them cyclophyllideans, that were identified in 190 vertebrate and 24 invertebrate host species. This is a very significant increase over the previous similar list that was established one century ago by Fuhrmann (1926). Since then, advances have been particularly important for parasites of mammals and birds although an important margin of progress remains for the latter as several bird families have been surprisingly little studied in the country. A large proportion of species described in Switzerland, including 22 that are represented by types, are available in public collections, most of them at the Muséum d'histoire naturelle de Genève. New reports were numerous in the second half of last century but have become scarce in recent decades. Today, tapeworms have been identified in no more than one third of Swiss vertebrate species and despite one century of progress, the true diversity of this fauna in the country remains to be determined.

This work is a supplement of our previous study (Schuchert & Collins, 2021) on hydromedusae observed and collected during night-time dives in the Gulf Stream off Florida. Close-up photos and collection of selected specimens for DNA extraction and 16S barcode sequencing permitted us to distinguish 49 distinct morphotypes or species of hydromedusae. Eighteen of them are new additions to the ones reported in our 2021 paper. Seven potential species of the 49 were only identified to the genus level, one to the family level. Two new species are described: Zancleopsis grandis sp. nov. and Melicertum tropicalis sp. nov. 16S sequences permitted us to identify the previously unknown subadult medusa of Podocoryna martinicana Galea & Ferry, 2013. Three species are new records for the Northwest Atlantic: Leuckartiara adnata Pagès, Gili & Bouillon, 1992, Corymorpha valdiviae (Vanhöffen, 1911), and Cnidocodon leopoldi Bouillon, 1978. The 16S data indicated the potential presence of cryptic species in Thecocodium quadratum (Werner, 1965), Laodicea undulata (Forbes & Goodsir, 1853), Orchistoma pileus (Lesson, 1843), and Pseudaegina rhodina (Haeckel, 1879).

The species Aspilota umbrosa Belokobylskij, 2007 is recorded for the first time in Europe. The first photographs of this species, both of the holotype and of the new record, the second in the world, are provided. The holotype was found near the Klyuchevskaya Sopka volcano (Kamchatka peninsula, Russia). The new specimen of this species was collected in a superficial subterranean habitat (the MSS – Milieu Souterrain Superficiel) in the rock glacier in Val Sassa (Swiss National Park, Grisons, Switzerland) by a subterranean trap in 2020. This is the first record of A. umbrosa in the MSS of the Swiss Alps and in a rock glacier. A key to the known Swiss species of Aspilota is provided.

The collections of the Muséum d'histoire naturelle de Genève hold type specimens of 12 species and one subspecies of grasshopper described by Marcello La Greca. These species are listed alphabetically with an account of the condition of the specimens, and the current binomial combination for each is provided.

In the summer of 2022, during a survey of the juniper forests of the Hezar Masjed Mountains, the entomological team of the Ferdowsi University of Mashhad (Iran) found a species of the genus Chlorophorus Chevrolat, 1863 close to C. elaeagni Plavilstshikov, 1956. After closer examination it appeared to represent a new species, which is described here as C. ahmadi sp. nov. The new species is a pest of live Juniperus polycarpos K. Koch var. turcomanica (B. Fedtsch) R. P. Adams (Cupressaceae) trees.

Deux espèces nouvelles de Gibberula sont décrites du Cameroun sur la base des caractères de leurs coquilles, comme G. knudseni sp. nov. et G. browningleeae sp. nov. La coquille de G. knudseni suggère de lointaines affinités avec le complexe G. oryza (Lamarck, 1822)/G. miliaria (Linnaeus, 1758) de Méditerranée et du nord-ouest africain, ainsi qu'avec G. cristata Gofas, 1989 décrite de la province de Luanda, nord-Angola. La coquille de G. browningleeae montre une certaine proximité avec G. punctillum Gofas & Fernandes, 1988 de São Tomé, dont elle diffère par une spire plus basse, un sommet arrondi, des dents labiales plus petites et moins nombreuses, et une encoche siphonale nettement moins échancrée. La distribution bathymétrique et géographique de ces deux espèces nouvelles reste à vérifier.

Description of two new Gibberula from Cameroon (Mollusca: Volutacea: Cystiscidae). - Two new species of Gibberula are described from Cameroon as G. knudseni sp. nov. and G. browningleeae sp. nov. based on their shell features. The shell of G. knudseni suggests distant affinities with the complex G. oryza (Lamarck, 1822)/G. miliaria (Linnaeus, 1758) from the Mediterranean and North-West Africa, and with G. cristata Gofas, 1989 described from the Luanda Province, in North Angola. The shell of G. browningleeae shows some affinities with G. punctillum Gofas & Fernandes, 1988 from São Tome, differing by a lower spire, a rounded top, smaller and less numerous labial teeth, and a noticeably less indented siphonal notch. The bathymetrical and geographical distribution of these two new species remains to be refined.

The Achilia sinuaticornis, A. kindermanni, A. humidula, A. praeclara, A. nigrita, and A. rufula species groups sensu Jeannel (1962 and 1963), and Achilia incertae sedis species according to Jeannel (1962) and Franz (1996) of the species-rich genus Achilia Reitter, 1890 are revised. Of the seventeen taxa placed in these seven species groups (including incertae sedis species), seven names are placed in synonymy: A. curta Jeannel, 1962 = A. longiceps (Reitter, 1885) syn. nov., A. elongata Jeannel, 1962 = A. humidula (Reitter, 1885) syn. nov., A. occipitalis Jeannel, 1962 = A. humidula (Reitter, 1885) syn. nov., A. diademata Jeannel, 1962 = A. humidula (Reitter, 1885) syn. nov., A. parvula Jeannel 1962 = A. humidula (Reitter, 1885) syn. nov., A. dicastrii Franz, 1996 = A. bicornis Jeannel, 1962 syn. nov., A. latifrons Raffray, 1904 = A. longiceps (Reitter, 1885) syn. nov. Achilia nigrita Jeannel, 1962 belongs to a different genus and will be treated in forthcoming papers. The remaining ten species are redescribed, and two new species belonging to the A. sinuaticornis group are described: A. fokkata sp. nov. and A. lapsus sp. nov. The lectotypes of A. longiceps (Reitter, 1885), A. convexiceps Raffray, 1904, A. quadraticeps Raffray, 1904, and A. latifrons Raffray, 1904 are designated. For all these species their distribution is detailed and mapped, and habitat/collecting data are summarized.

In this paper we propose a catalogue of the Longhorn beetles (Coleoptera, Cerambycidae) of Saudi Arabia. It is the result of several trips (2016, 2017, 2019) to the Kingdom by the authors with Daniele Baiocchi and Gianluca Magnani. A new genus and four new species (Arabogracilia saudita gen. nov. and sp. nov., Enaretta samai sp. nov., Hyllisia asirica sp. nov. and Phytoecia (Pseudoblepisanis) arabica sp. nov. are described. We also describe for the first time the female of Cantharoctenus filippovi (Plavilstshikov, 1933). Moreover, several new records for the Saudia Arabian fauna and for the Arabian Peninsula are given.

Fuscatelia Nikitsky & Belov, 1982, described as a subgenus of Lederia Reitter, 1879 and endemic to Chile, is formally elevated to genus rank. Fuscatelia oviformis (Fairmaire & Germain, 1863) is redescribed and illustrated, while F. cupula sp. nov. and F. metallica sp. nov. are newly described.

The knowledge on the Ancylolomia prepiella species complex of the Afrotropical region is reviewed. Nineteen new species are described and illustrated: A. anna sp. nov. from The Gambia, A. audeoudi sp. nov. from Uganda, A. fiorenzae sp. nov. from South Africa, A. greta sp. nov. from Cameroon, A. isabella sp. nov. from Cameroon, A. lavinia sp. nov. from Ivory Coast, Niger and Nigeria, A. lotis sp. nov. from Tanzania and Kenya, A. lucia sp. nov. from South Africa, A. lydia sp. nov. from Malawi, Mozambique, Namibia, South Africa and Zimbabwe, A. maria sp. nov. from South Africa, A. medioafricana sp. nov. from Angola, Cameroon and Democratic Republic of the Congo, A. sakania sp. nov. from Democratic Republic of the Congo, A. savutiensis sp. nov. from Botswana, A. shingwedzi sp. nov. from South Africa, A. sonia sp. nov. from Ghana, Guinea, Ivory Coast and Nigeria, A. sophia sp. nov. from Tanzania, A. trematerrai sp. nov. from Mozambique, A. vanessa sp. nov. from Ghana, and A. victoria sp. nov. from Zimbabwe.

Two new Psyllipsocus species are described and illustrated: P. burckhardti sp. nov. (from Cameroon) and P. namibiensis sp. nov. (from Namibia). A checklist of the eight species of Psyllipsocus known from the Ethiopian Region and North Africa is provided, comprising the cosmopolitan P. ramburii Selys-Longchamps, 1872, the pantropical P. yucatan Gurney, 1943, five species from African countries south of the Sahara and one from the southern Arabian Peninsula. The ornatus species group is proposed for three African species.

L'espèce élusive Volvarina cernita (Locard, 1897) est redécouverte de l'infralittoral inférieur et du circalittoral supérieur de l'archipel du Cap-Vert, et comparée avec les formes les plus proches. Un lectotype est désigné pour cette espèce. Volvarina antoniogonzalezi (Ortea, Moro & Espinosa, 2019), syn. nov., décrite de l'infralittoral supérieur de Sal, est placée en synonymie de V. cernita. L'espèce V. joubini (Dautzenberg & H. Fischer, 1906) est retrouvée de Boa Vista et considérée comme espèce jumelle de V. cernita. L'île de Boa Vista est proposée comme localité type de V. joubini. Une nouvelle espèce de petite taille et présentant des affinités moindres avec V. cernita est décrite du circalittoral de Santiago comme V. santiagoensis sp. nov. Un groupe d'espèces « V. cernita » est défini comme étant composé d'un sous-groupe « V. cernita » qui procède d'une radiation dans l'infralittoral inférieur et le circalittoral supérieur, et d'un sous-groupe « V. blezai» (Ortea, 2019) qui procède d'une radiation dans l'infralittoral supérieur.

The elusive species Volvarina cernita (Locard, 1897) is rediscovered from the lower infralittoral and the upper circalittoral of the Cape Verde archipelago, and compared with the closest forms. A lectotype is designated for this species. Volvarina antoniogonzalezi (Ortea, Moro & Espinosa, 2019), syn. nov., described from the lower infralittoral of Sal, is placed in synonymy with V. cernita. The species V. joubini (Dautzenberg & Fischer, 1906) is rediscovered from Boa Vista and considered a sibling species of V. cernita. Boa Vista Island is proposed as the type locality of V. joubini. A new species of tiny size and showing lesser affinities with V. cernita is described from the circalittoral of Santiago as V. santiagoensis sp. nov. A species group “V. cernita” is defined as being composed of a subgroup “V. cernita” resulting from a radiation at the lower infralittoral and upper circalittoral levels, and of a subgroup “V. blezai” (Ortea, 2019) resulting from a radiation at the upper infralittoral level.