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The natural distribution range of Aedes koreicus is Korea, China, Japan, and the Russian Far East. Since 2008, this species has been recorded as an invasive species in some European countries (Belgium, European Russia, Germany, Hungary, Italy, Slovenia, and Switzerland). The invasive mosquito species Ae. koreicus is reported from the Republic of Kazakhstan for the first time. Its morphological identification was confirmed by molecular-genetic analyses of ND4 sequences using specific primers. Aedes koreicus larvae were found in an artificial water reservoir together with the larvae of Culiseta longiareolata and Culex pipiens s.l. Aedes koreicus successfully overwintered in Almaty at low winter temperatures in 2018–2019. This suggests that the Ae. koreicus acclimation capacity is greater than it has been considered until now. We assume that Ae. koreicus will spread over the west and south of the Republic of Kazakhstan and territories of Kyrgyzstan and Uzbekistan Republics bordering the Almaty region.

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Infection with a new microsporidium, Fibrillaspora daphniae g. n. sp. n., was found in a local Daphnia magna population in Tomsk region (Western Siberia, Russia) at the prevalence rate of 52%. Histological sections showed parasite cells entirely encompassing the host haemocoel. Methanol-fixed spores were elongate, oval, 4.8 ± 0.3 μm × 2.3 ± 0.2 μm in size. All developmental stages were in direct contact with the host cell cytoplasm, with single nuclei, and division by binary fission. The sporont surface was covered with an additional outer layer composed of fine tubules. The spores possessed a thick endospore, large posterior vacuole filled with electron-dense granules, and a bipartite polaroplast composed of anterior lamellar and posterior globular elements. The polar tube was slightly anisofilar, with 13-19 coils arranged in one row; the two posterior coils were of lesser diameter. The small subunit ribosomal RNA gene sequence was deposited in Genbank under accession # MF278272. Considering the sister relationship between Fibrillanosema crangonycis and our new isolate described here as Fibrillaspora daphniae, we propose a new family Fibrillasporidae fam. n. to contain these two genera and the descendants of their common ancestor. A new superfamily Tubulinosematoidea superfam. n. is proposed as a monophyletic assemblage of Fibrillasporidae fam. n. and Tubulinosematidae.

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