The tropical and subtropical floodplain lakes are hypothesized as one of the globally interesting rotifer rich ecosystems. Our study indicating the biodiverse Rotifera of ten ‘slightly acidic to circum-neutral, moderately hard-water and de-mineralized’ tropical floodplain lakes (beels) of the Majuli River Island of the Brahmaputra river basin of northeast India mendorses this hypothesis. Total richness, the richness of important families and community similarities affirm heterogeneity mof the rotifer species composition amongst the beels. The species richness registers significant spatio-temporal variations with seasonal differences amongst the beels and individually in each beel, and lacks significant influence of the recorded abiotic factors. The constellations of 76-81 species in three beels during winter and 76 species in one beel during pre-monsoon are noteworthy instances of ‘Rotifera paradox’. The rotifer fauna of the Majuli beels registers affinity with Southeast Asian and Oriental faunas, records several species of the regional distribution interest and exhibits the littoral-periphytic nature, while application of Q B/T and Q L/B quotients depicts limitations. This study merits ecological diversity interest for Rotifera vis-avis the floodplain lakes of India and elsewhere from the tropics and subtropics, and assumes biodiversity conservation importance due to threat of extinction of the Majuli – an alluvial floodplain of the Brahmaputra basin.

Fifty-eight taxa of Odonata are herewith reported from Batanta Island (including Arefi and Birie Islands). One new species is described: Argiolestes varga sp. nov. The following ten species are new to the Raja Ampat Islands: Papuagrion magnanimum (Selys, 1876), Gynacantha rosenbergi Kaup, 1867, Palaeosynthemis cf. cervula (Lieftinck, 1938), Diplacina smaragdina Selys, 1878, Nannophlebia amphicyllis Lieftinck, 1933, Pantala flavescens (Fabricius, 1798), Rhodothemis nigripes Lohmann, 1984, Rhyothemis regia (Brauer, 1867), Tramea transmarina propinqua Lieftinck, 1942, Zyxomma multinervorum Carpenter, 1897, and fifteen are new to Batanta: Selysioneura cornelia Lieftinck, 1953, P. magnanimum, Agyrtacantha dirupta (Karsch, 1889), Anax maclachlani Förster, 1898, G. rosenbergi, P. cf. cervula, D. smaragdina, N. amphicyllis, Nesoxenia mysis (Selys, 1878), P. flavescens, R. nigripes, R. regia, Tetrathemis irregularis Brauer, 1868, T. transmarina propinqua, Z. multinervorum. Metagrion postnodale (Selys, 1878) and Selysioneura cf. cervicornu Förster, 1900 are deleted from the faunal lists of Odonata of Raja Ampat and Batanta Islands. The total number of species recorded for Batanta Island is 62.

Earthworm collectings on Corsica and Sardinia resulted in recording eight species belonging to the families Lumbricidae and Hormogastridae. Among them, Octodrilus transpadanus represents a new record for the fauna of Sardinia and Eumenescolex zoltani sp. nov. from Corsica is new to science.

Chthonius submontanus Beier, 1963, Ephippiochthonius romanicus (Beier, 1935) and Occidenchthonius parmensis (Beier, 1963) are firstly recorded from Hungary. The genus Occidenchthonius Zaragoza, 2017 is new for the country. A brief description and the relative figures are reported for each species. Fifty-seven species are currently recorded from Hungary.