The nematode Orientatractis brycini sp. nov. (Atractidae) is described from the intestine of Brycinus macrolepidotus Valenciennes (Alestidae) and Xenocharax spilurus Günther (Distichodontidae) collected in two localities from Gabon, Africa. The new species is characterized by the presence of four submedian lips with well-sclerotized pieces armed with two recurved pointed spines and one median large spine on their distal part, along with two smaller spines posterior to amphidial pores. It differs from its congeners mainly in the length of both spicules, gubernaculum, presence of two lateral spines posterior to amphids, distribution and number of caudal papillae. An emended generic diagnosis is provided. This is the eighth species in the genus Orientatractis, the fourth from fish hosts and the first from Africa, which expands its geographical distribution.

Apharinodes sinensis sp. n. is described from Yunnan, and represents the first named species of the tribe Hybocephalini Raffray from China. Male wing dimorphism is for the first time reported for a hybocephaline. An identification key to the four known Apharinodes species is given.

Selected beetles, mainly weevils, from the Alpine Arc were barcoded. From 187 samples of 106 assigned species of the families Curculionidae (152 samples, mainly Entiminae, Cyclominae and Hyperinae), Carabidae (18), Apionidae (6), Chrysomelidae and Staphylinidae (each 1 sample), sequences from the COI (subunit 1 of the cytochrome oxydase gene) were obtained, with a success of more than 86% (162 samples). In the cases of Otiorhynchus pupillatus Gyllenhal, 1834, O. nodosus (O. F. Müller, 1764), O. meridionalis Gyllenhal, 1834, Dichotrachelus koziorowicziDesbrochers des Loges, 1873, D. augusti F. Solari, 1946 and D. maculosus Fairmaire, 1869 more diversity was hidden than foreseen in the beginning, suggesting partly cryptic (not yet described) species. One name is thus resurrected from junior synonymy (O. civisStierlin, 1861stat. rev. from synonymy with O. meridionalis). In another case with strictly parthenogenetically reproducing populations of O. pupillatus and O. nodosus in the Swiss Alps, several lineages from hypothetical postglacial immigration events, or alternatively complexes of species in statu nascendi might explain the results observed. Moreover, some morphologically debated species-pairs/triples confirmed to be problematic too, even with our COI sequence data [Hypera nigrirostris (Fabricius, 1775) – ononidis (Chevrolat, 1863) – melarynchus (Olivier, 1807)]. On the other hand, in some cases the lspecies' identity, based on the monophyly of the investigated populations, could be confirmed [Anthonomus rubi (Herbst, 1795), Polydrusus chaerodrysius Gredler, 1866, P. paradoxus Stierlin, 1859]. In the hyperdiverse genus Otiorhynchus Germar, 1822, some preliminary insights into the systematics at the subgenus-level could be made, suggesting that many changes of the present morphologically based systematic structure will be necessary.

A new endogean carabid species of the genus Typhlocharis Dieck, 1869 from Portugal is described and illustrated: Typhlocharis mendesisp. n. The work provides diagnostic characters, the structure of male and female genitalia, discussions on affinities to related taxa, as well as some remarks on its ecology.

We report the first country record of the poorly known Gracixalus quyeti from Laos based on a recently collected specimen from Khammouane Province, central Laos. While the genetic analysis revealed nearly identical sequences, we found some differences in body ratios and color patterns among the specimen from Laos and the type series from the eastern side of the Annamite Range in Vietnam.

Henri de Saussure and Leo Zehntner described 76 species of millipede in three publications on the fauna of Madagascar (including additions from other islands). These species are listed alphabetically; the holdings of the Muséum d'histoire naturelle de Genève and the whereabouts of type specimens identified in other institutions are discussed, and the currently valid combination is given for each species. Spirobolus sikorae is transferred to the genus Hylekobolus.

Hemigrammus tridens is a small characid described by Eigenmann (in Eigenmann & Ogle, 1907) from Paraguay River, in the country Paraguay. The species has a conspicuous trident-shaped caudal spot, few perforated lateral line scales, scales on the caudal fin, and two pentacuspidate teeth in the outer series of the premaxilla. Hemigrammus tridens is found in the Paraná River basin of both, Argentina and Paraguay. The records from Argentina are the first for this species in the country. Comments on the type series are added.

All trachyuropodid mites described from South-East Asia are presented in a new illustrated key. Two new species of Bostocktrachys (B. surinensis sp. nov. and B. thailandica sp. nov.) from Thailand are described and illustrated. Both new Bostocktrachys species differ from the other known species of this genus by the strongly sclerotized lines of the dorsal shield. Four new combinations are proposed: Trachyuropoda (Leonardiella) imitansBerlese, 1905 is transferred to the genus Arculatatrachys, Trachyuropoda cistulataHirschmann, 1975 is placed in the genus Leonardiella, Trachyuropoda micherdzinskiiHirschmann, 1976 and Trachyuropoda tuberculataBerlese, 1913 in the genus Bostocktrachys.

The Joffre's pipistrelle Hypsugo joffrei is a rare and very little known vespertilionid bat previously thought to be confined to Myanmar and Vietnam in Southeast Asia. Based on recently collected material and reassessment of museum specimens, this species is being reported for the first time from India and Nepal which also significantly extends its westward geographic range beyond Myanmar. We also critically compare the type specimen of another poorly known congener from Myanmar, H. anthonyi with the present material and propose to recognize the name H. anthonyi as the junior subjective synonym of H. joffrei. Specimens previously identified as Philetor brachypterus from South Asia were found to represent H. joffrei, as well. Consequently, the distribution range of Philetor is restricted to the Sundaic zoogeographical subregion, the Philippines, New Guinea and Bismarck Is., and the species should be omitted from the bat checklists of India and Nepal.

This work provides information on the occurrence of adult trematodes (Aspidogastrea and Digenea) in freshwater fishes from Argentina. To date, a total of 77 trematode species belonging to 21 families have been recorded. Haploporidae, Allocreadiidae and Cryptogonimidae (15, nine and nine species, respectively) showed the highest species richness, whereas the number of species ranged from one to seven species for the other 18 families. Of these, five new species have been recently described in Argentina; nine were cited for the first time; 17 had new host records, and 28 were reported from new localities. The orders Characiformes, Perciformes and Siluriformes harboured the highest richness of trematode species.

The new species Paramaronius unituberculatus sp. nov. from Salta province, northern Argentina, is described and illustrated. An updated identification key including also the new species is provided.

The Achilia crassicornis, A. tumidifrons, A. bifossifrons, and A. lobifera species groups (sensuJeannel, 1962) of the species-rich genus AchiliaReitter, 1890 are revised. Of the twelve taxa previously placed in these four groups of species, two belong to different groups and will be treated in later papers (i.e. A. parvulaJeannel, 1962 and A. nahuelbutaeFranz, 1996 with the A. humidula and the A. cosmoptera groups, respectively), and five names are placed as junior synonyms: Achilia crassicornis antarcticaJeannel, 1962 and A. obscuraJeannel, 1962 = A. crassicornisJeannel, 1962 (syn. nov.); Achilia tumidifronsJeannel, 1962, A. globicepsJeannel, 1962 and A. paraglobicepsFranz, 1996 = A. larvata (Reitter, 1885) (syn. nov.). The lectotype and paralectotypes of A. larvata are designated. The five species left in these groups are redescribed, their distributions are detailed, and habitats/collecting data are summarized.

Two new genera and seven new species of the family Linyphiidae from the collections of the Muséum d'histoire naturelle de Genève are described: Kalimagone gen. nov. with Kalimagone cuspidata sp. nov. (the type species) and K. rotunda sp. nov. from Borneo; Tegulinus gen. nov. with Tegulinus sumatranus sp. nov. (the type species) and T. bifurcatus sp. nov. from Sumatra; Dumoga buratino sp. nov. and Prosoponoides jambi sp. nov. from Sumatra; and Oedothorax bifoveatus sp. nov. from Borneo and Java. A list of the linyphiid species currently known from Borneo, Sumatra and Java is presented.

Des prospections actives et ciblées ont été menées entre 2014 et 2016 dans l'espoir de trouver d'éventuelles populations résiduelles de Rats des moissons (Micromys minutus) dans le bassin genevois. Après avoir repéré une soixantaine de sites favorables à l'espèce, des recherches de nids ont été effectuées ainsi que des piégeages. Ces recherches ont permis de trouver 12 nouvelles stations, toutes situées dans le Pays de Gex (France, Ain), et de présumer que l'espèce est aujourd'hui absente du canton de Genève et peut-être aussi de la partie haut-savoyarde du Bas-Chablais située dans la zone prospectée. Ces découvertes révèlent le niveau de menace important qui pèse sur presque toutes les populations de Rats des moissons du bassin genevois.

DNA sequence data of hydromedusae and hydroids collected in the fjords near Bergen, Norway, permitted to connect three leptomedusae to three thecate hydroids with hitherto unknown life cycles. For all three species pairs, identical 16S and 18S sequences could be found. For comparisons, estimates of intraspecific variation of 16S sequences of other leptomedusa species were determined by comparing specimens collected at different localities. The sequence comparisons allowed us to conclude that Ptychogena croceaKramp & Dumas, 1925 is the medusa stage of the hydroid Stegopoma plicatile (M. Sars, 1863), Earleria quadrata (Hosia & Pages, 2007) the medusa of Racemoramus panicula (G.O. Sars, 1874), and Cyclocanna welshiBigelow, 1918 the medusa of Egmundella producta (G.O. Sars, 1874). Due to non-matching geographic distribution patterns of the medusa and hydroid phases, as well as the possibility that other related medusa species may have morphologically identical hydroids, the identities of Stegopoma plicatile and Racemoramus panicula are considered ambiguous. These nominal species likely refer to species complexes. Their names are therefore considered as partial synonyms of the medusa-based names and the latter should remain in use despite being more recent. Cyclocanna welshi and Egmundella producta are recognised as synonyms, and the species should from now on be referred to as Cyclocanna producta (G.O. Sars, 1874) n. comb.

The Muséum d'histoire naturelle de Genève contains type specimens of nine species of parasitic marine isopods, all described in the 19th century. These are enumerated and the current nomenclatural combination is given.