The article provides morphological and molecular description of rare species Malenchus pressulus (Kazachenko, 1975) Andrássy, 1980 which was found for the first time in Poland. Morphology of specimens belonging to Polish population correspond well with previous descriptions of M. pressulus. Howewer, small differences were observed — number of lines on lateral field or number of head annuli between various populations. This article also provides comparison of head morphology of two very similar and difficult to distinguish species: M. pressulus and Malenchus neosulcus Geraert et Raski, 1986. Additionally, for the first time descriptions of partial sequences of 18S rDNA and 28S rDNA for M. pressulus are given.

Based on the newly acquired and previously published data the diversity patterns of Stizopina (Tenebrionidae: Tenebrioninae: Opatrini) are analyzed. At present, the subtribe consists of 101 species and subspecies (in 22 genera) distributed in the arid ecosystems of southern Africa and Madagascar. The highest diversity of species was reported from the Succulent Karoo ecoregion (near the Namibia-South Africa border). Vector data model for Endrödy-Younga's Coleoptera zones is provided. A new genus, Eichleria, with two new species (E. davidi, E. ostrowskii) of the subtribe Stizopina is described from the Nama Karoo ecoregion (Republic of South Africa). Eichleria differs from the related genera Amathobius and Nemanes in having mentum with median carina, convex pronotum, narrow intercoxal process of prosternum, fine pronotal and elytral sculpture, obtuse protibiae, and straight male mesotibiae.

The African species of the genus Menephilus are revised and figured. A key to the species is provided. New species: M. ardoini sp. nov. (Cameroon), M. kanlamaensis sp. nov. (Congo), M. kivuensis sp. nov. (Congo), M. okondoensis sp. nov. (Congo, Cameroon); new synonyms: M. fasciolatus camerunensis Ardoin, 1958 syn. nov. of M. fasciolatus (Fairmaire, 1891), M. quadriplagiatus Fairmaire, 1891 syn. nov. of M. quadrinotatus Motschulsky, 1872, M. trifasciatus nigricollis Ardoin, 1958 syn. nov. of M. trifasciatus Gebien, 1911; new combination: Taraxides brevitarsis (Quedenfeldt, 1885) new comb. from Menephilus with Menephilus blapoides (Fairmaire, 1893) syn. nov.

A new darkling beetle species, Arthrodosis taravatii sp. nov., of the tribe Erodiini (Coleoptera: Tenebrionidae), is described from Iran. It can be distinguished from its congeners by a unique structure of antennae (elongated terminal antennomeres). A key for the Iranian species of Arthrodosis is provided.

Trigonocarinatus, a new genus of Aspidimerini with four new species, T. menghaiensis, T. ramus, T. gongshanus and T. cuneatus Huo et Ren, spp. nov. are described from the Oriental Region. Cryptogonus montanus Hoàng, 1985 is redescribed and transferred to the new genus (comb. nov.). A comparative account of the diagnostic characters of genera of Aspidimerini is provided with illustrations. A key to Chinese Trigonocarinatus species is provided.

The hingstoni and subvillosus groups of species of the subgenus Scymnus (Pullus) Mulsant occurring in China are reviewed. Among descriptions of 31 species provided, 18 species are described as new to science: Scymnus (Pullus) ampuliformis sp. nov., S. (P.) bulangicus sp. nov., S. (P.) caudatus sp. nov., S. (P.) dasyphyllus sp. nov., S. (P.) devexus sp. nov., S. (P.) epimecis sp. nov., S. (P.) hiulcus sp. nov., S. (P.) inclinatus sp. nov., S. (P.) luridus sp. nov., S. (P.) menglianicus sp. nov., S. (P.) obliquophyllus sp. nov., S. (P.) paleaceus sp. nov., S. (P.) porcatus sp. nov., S. (P.) praecisus sp. nov., S. (P.) selliformis sp. nov., S. (P.) tropicus sp. nov., S. (P.) wudangensis sp. nov. and S. (P.) xiaoweishanus sp. nov. Two species, Scymnus (Pullus) godavariensis Miyatake, 1985 and Scymnus (Pullus) subvillosus (Goeze, 1777) are recorded from China for the first time. Diagnoses, detailed descriptions, illustrations and distributions are provided for each species. Key to the species groups of Scymnus (Pullus) from China and keys to the species of hingstoni group and subvillosus group are also given.

The net-winged beetles are often highly similar in external morphology due to evolution of common aposematic patterns. The reliable diagnostic characters are found only in males; mostly in their genitalia, size of eyes and shape of antennae. Molecular delimitation can provide further data to distinguish morphologically similar species and provide additional evidence when morphology based delimitation is ambiguous. Here, we present a review of Cautires with a single pronotal areola from Peninsular Malaysia. Five species have previously been described from the western coastal area of the Malay Peninsula and we identified further six species, four of them from male representatives and formally described here: C. paraimitator sp. nov., C. tanahratensis sp. nov., C. parallelus sp. nov., and C. tapahensis sp. nov. We demonstrate the high congruence between DNA and morphology based delimitation of species in most cases. DNA data enable identification of the female semaphoronts and the species variable in color patterns. The external morphological characters and male genitalia are illustrated and an identification key is provided.

Four new species of the doryctine genus Rhaconotus Ruthe from Mexico and Brazil, Rh. brasiliensis sp. nov., Rh. colegiomadridi sp. nov., Rh. republicanus sp. nov. and Rh. sabinae sp. nov., are described and illustrated. A key to ten species of Rhaconotus known for the American continent south of the USA is provided.

A new genus Venisiella and species V. manifesta of Lophopidae from the Fiji islands are described. The phylogenetic features of the new taxon were coded and analyzed using parsimony to placed it within the previously published phylogeny of the family. Lophopidae remains monophyletic, with the new genus in the Makota group sister to Buxtoniella. The historical biogeography of the Makota group is discussed and characters are given in order to distinguish this new genus from Buxtoniella.

A hybrid Leuciscus leuciscus × Alburnus alburnus was found during the ichthyofaunistic studies in the Bystrzyca River, a left-bank tributary of the Odra River (SW Poland). The hybrid was identified on the basis of its intermediate features and characteristics of the parent species (biometrical, osteological and anatomical) such as opercular and dental bones, pharyngeal bones and teeth, shape of scales, number, form and structure of radial canals of the scales, and air bladder and a complex of meristic and morphometric characters. With respect to its characteristics, the hybrid is closer to dace than to bleak. The small abundance of the hybrid shows that the hybridisation was rather accidental.