Patellogastropod diversity was greater along the west coast of India and only Cellana rota was available throughout the mainland Indian coastline.Tonnoiriella Vaillant, 1971 was one of the genera not treated by F. Vaillant for his revision in Die Fliegen der paläartktischen Region. Here we provide a genus diagnosis, re-describe known species based mainly on type material, and provide descriptions and figures of the West-Palearctic species. New species described are T. aurasica sp. nov., T. italiae sp. nov., T. ikariae sp. nov., T. andradei sp. nov., T. rhodesica sp. nov., and T. goncalvesi sp. nov.; T. androsica Vaillant, 1978, T. orientalis Vaillant, 1978, and T. pallidipenis Vaillant, 1978 are nomina nuda; finally 21 species are known to date from Europe and North Africa. The ejaculatory apodeme (basiphallus) is asymmetric and bilobed, lobes are stacked; one or both lobes are connected with asymmetric, cross positioned (distiphallus) sclerites. Operating of the open-close mechanism of the aedeagus is explained. Information on larval ecology is provided and the systematic position of the genus is discussed.The taxonomy of the tribe Porricondylini is revisited using male adult specimens from Sweden, whose morphology was studied by transmitted-light microscope. Results communicated here include both descriptions of new taxa (one genus, 19 species) and considerably expanded species distributions (five new Fennoscandian records). New taxa, all to be attributed to both authors, are Cassidoides cornutus sp. nov., Coccopsilis pectinata sp. nov., Cocc. recondita sp. nov., Cocc. PEG300 scalpta sp. nov., Dendrepidosis lapponica sp. nov., D. upplandica sp. nov., Monepidosis difficilis sp. nov., M. hybrida sp. nov., Neocolpodia ombergensis sp. nov., Oelandyla rostrata gen. et sp. nov., Parepidosis kaltisbackensis sp. nov., Paurodyla serrata sp. nov., Porricondyla bidentula sp. nov., Porr. diversicornis sp. nov., Porr. gemina sp. nov., Porr. ottenbyensis sp. nov., Porr. pallidigenae sp. nov., Spungisomyia carinaolssonae sp. nov., and S. svemapro sp. nov. Species recorded in Fennoscandia for the first time are Bryocrypta angustata Mamaev (previously known from Latvia and European Russia), B. lobata Mamaev (previously Ukraine), Isocolpodia unidentata (Marikovskij) comb. nov. (previously Kazakhstan), Monepidosis duplicis Mamaev (previously Latvia and Far East Russia), and Zaitzeviola dubitabila (Mamaev Zaitzev) (previously Far East Russia). The morphology of males of the newly recorded species is redescribed. Monepidosis tinnerti Jaschhof Jaschhof, 2015 syn. nov. is revealed to be a junior synonym of M. duplicis Mamaev, 1998.Diplommatina Benson, 1849 (Caenogastropoda Diplommatinidae) is a species-rich genus of terrestrial microsnails with a constriction near the beginning of the last whorl (Kobelt 1902). It includes several hundred species in eastern and southern continental Asia, Japan, Taiwan, Indonesia and the Philippines. Although known for more than a century from the Himalayas and other mountain ranges in India, the first Diplommatina from Nepal were reported not before 1997 (Kuznetsov Schileyko 1997). A recent revision reported 16 species of the genus from Nepal (Budha et al. 2017).The subfamily Panchaetothripinae (family Thripidae) is represented by 140 species under 40 genera (Thrips Wiki 2019). In India, 36 species under 16 genera are recorded (Tyagi Kumar 2016, Tyagi et al. 2017, Rachana and Varatharajan, 2018, Johnson et al. 2019). The members of this subfamily are leaf-feeders and usually dark brown in colour with strongly reticulate sculpture on body, terminal antennal segments needle-shaped, tarsi 1- or 2-segmented, fore wing upper vein fused with costa. The genus Tryphactothrips was established by Bagnall (1919), and this genus remains monobasic with only Dinurothrips rutherfordi Bagnall from Sri Lanka as the type species. The genus Tryphactothrips can be distinguished from related genera by the presence of sculptured round areolae on abdominal segments. It is closely related to Anisopilothrips Stannard Mitri but can be identified by paired sigmoidal setae on abdominal tergites (absent in Anisopilothrips), mesonotum without complete median longitudinal split (complete median longitudinal in Anisopilothrips). Recently, a series of both sexes of Tryphactothrips rutherfordi with banded fore wings was collected on fern from Kerala state of India. Females were identified using published keys (Wilson 1975), and the male is here described for the first time. DNA was isolated from the studied specimens and partial fragment of mtCOI gene was amplified and sequenced (Tyagi et al. 2017). Four sequences were submitted in the GenBank (Accession No. MN627201 to MN627204). Photographs and illustrations were taken through a Leica Trinocular Microscope (Leica DM-1000) using Leica software application suite (LAS EZ 2.1.0). The studied specimens were deposited in the National Zoological Collections (NZC), Zoological Survey of India, Kolkata, India.The subgenus Bodilus Mulsant Rey, 1870 of the genus Aphodius Helwig, 1798 sensu lato comprises 30 species in the Palearctic fauna (Frolov 2001, 2002, Dellacasa et al. 2016 [treated as genus Bodilus]). Frolov (2001) reviewed the species of this subgenus from Russia and adjacent countries and suggested that the monotypic subgenus Paramelinopterus Rakovič, 1984 shares the main diagnostic characters of Bodilus. Frolov (2001) was unable, however, to examine the type species of Paramelinopterus, A. longipennis Rakovič, 1984, at that time. Král (2016) suggested that A. (Bodilus) inylchekensis Frolov, 2001 is a junior synonym of A. longipennis. Recently we have re-examined all the types as well as the additional material accumulated in the museums and can confirm that A. inylchekensis is a distinct species, but A. insperatus Petrovitz, 1967 and A. longipennis cannot be reliably separated by the morphological characters. In the present contribution we illustrate the major diagnostic characters of the species based on the type specimens and also provide a distribution map of the known localities of the species.During an investigation carried out by the Institute of Oceanology, Chinese Academy of Sciences (IOCAS), two living buccinid specimens were collected from a deep-sea methane seep area in the South China Sea. Observations of the shell, gross anatomy and radular morphology reveal that they represent an undescribed species of the genus Enigmaticolus. In this paper, we describe and illustrate this species as Enigmaticolus inflatus sp. nov. The new species is by general shell shape most similar to Enigmaticolus marshalli Fraussen Stahlschmidt, 2016 from Kermadec Ridge, New Zealand, but can be distinguished from it by having an inflated shell with reduced spiral sculpture, and by the absence of axial sculpture. Phylogenetic analysis using 636 bp of the cytochrome oxidase c subunit I (COI) gene also supports its systematic placement within Enigmaticolus.