The species of the genus Tentyria Latreille, 1802 are one of the most representative soil beetles in Doñana National Park, natural area of invaluable ecological value in terms of diversity. This research is aimed to study the representation of the genus Tentyria in Doñana, consisting in four well distinguishable species: T. platyceps Steven, 1829, T. subcostata Solier 1835 and two new species to science, T. donanensis sp. nov. and T. bifida sp. nov., which are described on this paper. The four species are morphologically compared and data about their phenology, distribution and abundance in the research area are also given. A lectotype is designated for T. subcostata and a new synonymy is proposed: T. emarginata Kraatz, 1865 = T. subcostata, Solier, 1835. We also propose that T. marocana Solier, 1835 and T. maura Erichson, 1841 (=T. acuminipennis Lucas, 1855) must to be considered valid species instead of synonymies of T. subcostata. A key to species of Tentyria from Doñana National Park is also included.

Gonioctena tredecimmaculata (Jacoby, 1888) is redescribed and two new species, G. ohmomoi sp. nov. and G. riyuetanensis sp. nov., are described from Taiwan. Gonioctena tredecimmaculata var. taiwanensis (Achard, 1924) is removed from synonymy with G. tredecimmaculata and raised to the species level. The larva of G. tredecimmaculata is described in detail and compared with that of G. taiwanensis.

A new genus and four new species of Indian endemic beetles belonging to the subfamily Ototretinae (Lampyridae) are described: Flabellopalpodes gen. nov., F. flavus sp. nov., F. brancuccii sp. nov., F. atricornis sp. nov., and F. tamilnaduensis sp. nov. One species formerly placed in Drilidae, Selasia maindroni Bourgeois, 1903, is transferred to the genus Flabellopalpodes, and consequently F. maindroni (Bourgeois, 1903) is proposed. A key to species and illustrations of diagnostic characters are given.

A new species of the lycoperdinine genus Archipines (Endomychidae), Archipines boliviensis sp. nov. from Bolivia is described and illustrated. Archipines exsanguis sanestebani Tomaszewska is raised to a species level, as A. sanestebani Tomaszewska stat. nov., based on evidence revealed by SEM methods. Similarities and differences between species within a group containing also A. boliviensis and A. sanestebani which have in common: basal sulcus on pronotum visible and male abdominal ventrite 6 emarginate are discussed. An updated key to the known species of Archipines is presented.

A new species of Psyllaephagus Ashmead (Hymenoptera: Encyrtidae), P. arjuna Singh, sp. nov., a primary parasitoid of Terminalia arjuna leaf pit gall making psyllid, Trioza fletcheri minor Crawford, is described. Females and males of the species are illustrated and it is compared with Psyllaephagus bengalensis Hayat.

A new species of Mydrosomella Michener, 1986 - M. caatinguensis Ferrari, Arantes et Silveira sp. nov. is described and illustrated. The bees were collected in the municipalities of Remígio and Sumé, in the state of Paraíba, and Canindé de São Francisco, state of Sergipe, all in the semiarid domain of Caatinga, in northeastern Brazil. The type series of the species includes five females collected in Malaise traps and one male captured on flowers of Waltheria indica Linnaeus (Malvaceae). Mydrosomella caatinguensis sp. nov. can be differentiated from the other known species in the genus by the mostly yellow pilosity, single preapical tooth on the female mandible, enlarged ocelli, and absence of arolia. This is the third species described in the genus and the only one recorded in a tropical region. An identification key to all Mydrosomella species is given.

Two new species of Platygastrinae (Hymenoptera: Platygastridae) are described, based on specimens collected in Europe: Metaclisis semistriata sp. nov. (Austria) and Platygaster polonica sp. nov. (Poland). A female and two males of Synopeas burgeri Buhl, 2012, a species known so far from a single female collected in Germany, are recorded from Poland and male characters of this species are described and illustrated for the first time. Comparative notes on similar taxa are given.

Erythraeus acis (Berlese, 1882) is redescribed basing on type specimen from Berlese Acaroteca deposited in Firenze, Italy. The individual, labelled as ‘Coll. Berlese, Erythraeus acis (tipico) Berl. Acireale’ and registered in the collection as 30/40 is illustrated, measured and described. Diagnosis and description are supplemented with standard measurements, not considered in original description. Differentiating diagnoses comprise Palaearctic species of Erythraeus Latreille, 1806, known from postlarval forms, and satisfactorily described in literature. Concise diagnosis and systematic status of Erythraeus gorcensis Gabryś, 2016, is provided. Neotypes for Erythraeus adpendiculatus (Schrank, 1781), E. opilionoides (C. L. Koch, 1837) and E. rupestris (Linnaeus, 1758) are designated as well. The case of sexual dimorphism, sporadic in Erythraeus, and its influence on synonymy is mentioned in relation to Erythraeus cinereus (Dugés, 1834) (= Erythraeus similis (Canestrini, 1885)).

A new species, Stibarokris hydrobates sp. nov. is described from Hydrobates pelagicus (Linnaeus) (Procellariiformes: Hydrobatidae) from Malta. This species differs from other representatives of the genus Stibarokris Kethley, 1970 in the absence of the projection on the proximal end of the stylophore (vs. presence in all other species) and in the presence of the basal angles on tarsal claws I–IV (vs. absence). The following syringophilid species are recorded from new hosts of aquatic birds: Stibarokris phoeniconaias (Skoracki and OConnor, 2010) from Phoenicopterus chilensis Molina (Phoenicopteriformes: Phoenicopteridae) from South America, Stibarokris dastychi Glowska and Skoracki, 2011 from Phalacrocorax pygmeus Pallas (Suliformes: Phalacrocoracidae) from Greece, Procellariisyringophilus bulwerius Kethley, 1970 from Calonectris diomedea (Scopoli) (Procellariiformes: Procellariidae) from Spain and Ardenna pacifica (Gmelin) (Procellariidae) from Indonesia.

This study is based on the salticids collected by Åke Holm in Kenya. Two new genera, Kakamega gen. nov. and Ragatinus gen. nov. are erected, and descriptions of 11 new species are given: Brancus signatus sp. nov., Habrocestum naivasha sp. nov., Heliophanus minor sp. nov., Kakamega holmi sp. nov., Langelurillus kenyaensis sp. nov., Pellenes obvolutus sp. nov., Phintella kaptega sp. nov., Plexippus fibulatus sp. nov., Ragatinus maddisoni sp. nov., Thiratoscirtus elgonensis sp. nov. and Thiratoscirtus minimus sp. nov. One new combination is proposed, Hasarinella roeweri (Lessert, 1925) comb. nov. (ex Hasarius). The female of H. roeweri comb. nov. and male of Phintella lucida Wesołowska et Tomasiewicz, 2008 are described for the first time. Twenty eight species are recorded in Kenya for the first time. The role of Mount Elgon as a biodiversity hotspot is discussed; 11 species of jumping spiders are possibly endemic to this mountain massif.

A new species of the genus Heterometrus is described on the basis of a specimen recently collected in Thailand. Heterometrus minotaurus sp. nov. is morphologically closest to H. longimanus. The newly described species is well distinguished by its smaller overall size (83 mm) and shorter and less narrow metasoma with specific dorsolateral carinae on the fourth metasomal segment consisting of 9 or fewer granules. No females are known and so knowledge of sexual dimorphism in this species is currently lacking. In addition to the morphological characterization of H. minotaurus sp. nov., we present here also a description of the male holotype's karyotype. The diploid set of H. minotaurus sp. nov. consists of 54 chromosomes with a predominance of metacentrics, which gradually decrease in size. The presence of two types of multivalent association observed in postpachytene and metaphase I is commented on. Current knowledge of karyotypes of Heterometrus species is briefly summarized and compared with our cytogenetic results. In conclusion, we discuss the possible usefulness of karyotype as another interspecific feature applicable in the taxonomy of this scorpion group.

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. ventrosa inhabits western Europe, Tunisia, the Peloponnesus and the Corinthian Gulf (Itea: present study), both in the Ionian Sea, and — surprisingly — the coast of the Black Sea in Romania (Constanza: present study). E. maritima was found in the Black Sea and the Aegean Sea. Estimated time of divergence between the species is 3.30 ± 0.23 Mya, and 1.00 ± 0.11 Mya between E. maritima from Pomorie Lake and the other studied localities. The observed pattern is discussed in the context of the geological history of the region, especially glaciation events. Speciation of E. maritima in the Ponto-Caspian waters isolated from the Mediterranean in the Late Piacenzian and divergence of the population presently occurring in Pomorie Lake during the local Calabrian salinity crisis are postulated.

Globicornis (Globicornis) maroccana Kadej, Háva, Herrmann, Benyahia & Brustel sp. nov. from Morocco is described, illustrated and compared with related species: Globicornis (Globicornis) luckowi Herrmann et al. (2011), G. (Globicornis) nigripes (Fabricius, 1792) and G. (Elania) vaulogeri Pic, 1900.