Four Psocoptera species are reported as new records for Bulgaria: Valenzuela corsicus (Kolbe, 1882) (Ihtimanska Sredna Gora Mts), Reuterella helvimacula (Enderlein, 1901) (Rila Mts), Mesopsocus helveticus Lienhard, 1977 and Hyalopsocus contrarius (Reuter, 1893) (both from Sakar Mts). After this article there are a total of 71 psocid species known from the country.

In the paper cytochrome oxidase subunit I (COI) in minute gastropods Ecrobia has been sequenced from five localities at the Black Sea (Pomorie Lake and Constanza) and eastern Mediterranean (Gulf of Corinth, Evvoia Island, Attica). Pomorie Lake, a hyperhaline lagoon in eastern Bulgaria, harbours a population of Ecrobia maritima, whose shell and penis morphology are presented. COI partial sequences of E. maritima from Pomorie Lake differ markedly from those in the two Aegean populations not studied so far (Evvoia Island, Attica), and from another four studied earlier, scattered across the Black Sea and Aegean Sea. Such a high level of divergence was unexpected, since Pomorie Lake is only about 20 km away from the closest known locality of E. maritima (Burgas, Bulgaria). The mean p distance within E. maritima was 0.0113. A similar value of p distance (0.0137) was found within the clade grouping all the haplotypes of E. ventrosa. Mean genetic distance between these two species is p = 0.048. E. ventr...

Four new Psocoptera species were described as new to science from the coastal area of East Africa: Echinopsocus keniensis n. sp., Cerobasis lienhardi n. sp., Lithoseopsis juliani n. sp. (Kenya), and Mepleres gurusamyi n. sp. (Zanzibar). One Nanopsocus species was found only in a nymph stage, and was supposed to be representative of an unknown species too.

Diplura is a group of entognathous hexapods, often considered a sister group to insects. They play an important role in recycling organic matter in soil and subterranean terrestrial ecosystems. The Campodeidae is the most diverse family, divided into four subfamilies. The subfamily Plusiocampinae has a subterranean life-style with many species distributed in the Euro-Mediterranean area. The incertae sedis tachycampoids (“lignée Tachycampoïde”) is a group within the family Campodeidae that share with the Plusiocampinae a strong preference for subterranean habitats and several morphological characters, such as slender body shape, elongated appendages, considerable increment in the number of antennomeres and cercal articles, and complexity of sensorial structures. The present monograph provides a taxonomic revision of the subfamily Plusiocampinae and the genera belonging to the tachycampoid lineage from Europe and the Mediterranean region. It comprises detailed morphological descriptions and illustrations together with data on the habitats and distributions of 87 species, 10 subspecies and 11 affinis forms. Seven new species are described among those, namely: Plusiocampa (Plusiocampa) apollo Sendra, Giachino & Vailati sp. nov., P. (P.) chiosensis Sendra & Gasparo sp. nov., P. (P.) dublanskii Sendra & Turbanov sp. nov., P. (P.) hoffmanni Sendra & Paragamian sp. nov., P. (P.) rhea Sendra sp. nov., P. (P.) ternovensis Sendra & Borko sp. nov. and P. (Venetocampa) ferrani Sendra & Delić sp. nov.

A new species of genus Vitrea is described: Vitrea ulrichi sp. n. is the eleventh species within the genus found in Bulgaria, and the largest representative of the Bulgarian Vitrea. Some critical notes on the taxonomy of the species V. bulgarica and V. sturanyi are presented. A key is provided for the determination of the species of Vitrea found in the country.

A total of 28 species of 13 families were registered. All species recorded were new records to the Zanzibar autonomous region, ten to Tanzania, eight to East Africa and two (Lepidopsocus pretiosus (Banks, 1942) and Belaphopsocus murphyi Lienhard, 1991) were new to the entire African continent. Original photos of 22 of the found species were provided, some of these species had never been photographed before.