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owing inventory of genera from the Late Triassic of Queensland which are the oldest representatives of extant groups, adding further evidence of the Triassic as the dawn of much of the modern insect fauna.Two new species of Cunaxidae, Cunaxoides lajeadensis Wurlitzer Monjarás-Barrera sp. nov. and Lupaeus waldumirus Wurlitzer Monjarás-Barrera sp. nov., are described from Ipomoea alba L. (Convolvulaceae) on the edge of an urban forest fragment.A new species of mealybug, Formicococcus tectonae Joshi, Bindu Gullan sp. n., is described and illustrated based on adult females collected from teak, Tectona grandis (Lamiaceae), in plantations in Thrissur district, Kerala, southern India. The mealybug lives in tunnels made by the teak trunk borer, Cossus cadambae (Moore) (Lepidoptera Cossidae). Ants of a Tapinoma species were found in the tunnels, tending the mealybugs. The new mealybug is most similar morphologically to F. polysperes Williams and F. robustus (Ezzat McConnell) comb. rev. A key to adult females of all the Formicococcus species recorded from India is provided.The Bittacidae of South China consist of two species of Bicaubittacus and eight species of Bittacus, among which three species are described here as new to science. Bittacus acutus sp. n. from Guangxi is recognized mainly by the hat-shaped epandrial lobe with an acute ventro-distal process in the male genitalia. Bittacus shaoguanensis sp. n. from Guangdong is distinguished by the triangular epandrial lobe in the male genitalia, and a V-shaped streak in the central part of wings. Bittacus longilobus sp. n. from Guangdong is recognizable by the main body of the epandrial lobe trapezoid, with an elongate ventro-distal lobe twice as long. The number of described species of the Chinese Bittacus is now raised to 41. A key to the species of Bittacidae in South China is provided.Kudoa ajurutellus n. sp. (Multivalvulida Kudoidae) is described as a parasite of the Bressou catfish, Aspistor quadriscutis (Siluriformes) collected at Ajuruteua beach, northeastern Pará, Brazil. The new species is described based on the morphology of the spores and the sequence of the 18S rDNA. This parasite was found only in the skeletal muscular tissue of fish hosts. In the apical view, the spores were pseudo-quadrangular in shape, with rounded borders, and four symmetrical capsules. The spores are 6.63±0.53 μm in length and 8.16±0.75 μm in width. The polar capsules are piriform, 3.45±0.30 μm in length and 1.87±0.15 μm in width. The phylogenetic analysis based on the sequence of the 18S rDNA gene indicated that the new species is clearly distinct from all other Kudoa species, and that the degree of differentiation is constant with the existence of a new species of the genus Kudoa. This is the first marine Kudoa species recorded in northeastern of the State of Pará.Scouring-rushes (Equisetum sg. Hippochaete) are a group of horsetails with perennial aerial shoots strongly encrusted in silica. Accordingly, they seem to resist attacks from most herbivorous insects. Michelsen (2008) speculated that larval development of the European Pegomya terminalis (Rondani) and related anthomyiids takes place in specific scouring-rushes. Presently, we document that the larvae of two North American species related to P. terminalis attack developing shoots of Common scouring-rush, Equisetum hyemale L. Both species, Pegomya disticha Griffiths and P. cedrica Huckett, were found to coexist in a population of scouring-rush in Oklahoma. Various aspects of the life-history and morphology (3rd instar larva, male and female adults) for both species are described and documented by photos.Our aim was to delimit the taxonomic status of the snapping shrimp Alpheus lobidens De Haan, 1849, based on morphological and molecular analyses of the topotype material from Nagasaki (Japan). We provide a redescription, detailed illustrations, and molecular data. Through comparisons with close-related species, we also tested the taxonomic status of A. inopinatus Holthuis Gottlieb, 1958 and A. buckupi Almeida, Terossi, Araújo-Silva Mantelatto, 2013. We examined 74 specimens previously identified as A. lobidens, 84 specimens of A. buckupi, and 30 of A. inopinatus. The morphological analysis was based on the examination of 68 characters. The molecular analysis included mitochondrial gene sequences (16S) of 18 individuals six A. lobidens, three A. buckupi, one A. inopinatus, and eight individuals of other species of Alpheidae. The morphological analysis revealed that A. lobidens sensu stricto is consistently distinct of A. lobidens sensu lato, A. inopinatus and A. buckupi. The genetic analyzes (Bayesian Inference and p-distance) corroborated the morphological results and showed a clear separation between them. The highest values of genetic divergence (p-distance) (19%) were observed between A. lobidens sensu stricto and A. buckupi, and between A. lobidens sensu stricto and A. lobidens sensu lato from Australia (Northern Territory). The lowest divergence (12%) occurred between A. lobidens sensu stricto and A. lobidens sensu lato from Marshall Islands. Based on our results, the occurrence of A. lobidens sensu stricto is currently restricted to the type locality in Japan, and A. inopinatus and A. buckupi are valid taxa. selleck inhibitor Delimiting A. lobidens sensu stricto is relevant since the name A. lobidens has been applied to cryptic species, resulting in a high unclear taxonomic state.Erythraeus (Parerythraeus) thomasi sp. nov. is described and illustrated based on specimens collected from Finland. Parerythraeus Southcott, 1946 stat. nov., previously synonymized with Erythraeus Latreille, 1806, is considered a subgenus of Erythraeus. Thirteen species, including E. (P.) thomasi, are included in this subgenus, and a differential diagnosis is provided for the 12 adequately described species. A key to all known species of Erythraeus (Parerythraeus) is also provided.A key to 19 species from Australia in the genus Hoplothrips is provided, including 11 described as new species H. bellingeni, H. giganteus, H. lamingtoni, H. lihongae, H. lowdeni, H. nelsoni, H. oakeyi, H. reedi, H. tarsus, H. woodsi, H. wrightae. One species, H. semicaecus (Uzel), is recorded in Australia for the first time, and H. corticis (De Geer) and H. orientalis (Ananthakrishnan) are newly recorded from the Australian mainland. Structural diversity among the species of the genus Hoplothrips is discussed. Members of this genus share many character states with species of Deplorothrips, Hoplandrothrips and Psalidothrips that also live as fungal-hyphal feeders on dead branches and in leaf litter.