, a new species of tumbling flower beetle from the island of Ischia in Italy (Coleoptera, Mordellidae).

A. Costa, 1854, the most species-rich genus of tumbling flower beetles comprises more than 800 species worldwide and more than 150 reported from Europe. Here, a new species Mordellistena(s.

Potamophilus acuminatus (Fabricius, 1792): distribution update in North Africa confirmed by COI barcoding sequencing (Coleoptera, Elmidae).

Potamophilus acuminatus (Fabricius, 1792) is here recorded for the first time from Morocco and the recent distribution in Slovakia is updated. The North African distribution was hitherto based only on two larvae from Tunisia. DNA-barcoding confirmed the identification of specimens from Morocco after comparing ten sequences of P.

 sp. nov. (Insecta, Coleoptera, Elmidae) from Gunung Mulu National Park in Sarawak (Malaysia).

, from Sarawak, northwest Borneo, Malaysia, is described and illustrated along with an identification key. The standard barcoding fragment of the mitochondrial gene coding for cytochrome c oxidase subunit I (COI) was used together with morphological characters to delimit the taxonomic boundaries of the two known species, which live in shallow streams flowing through dense primary forests in limestone areas in Pahang (West Malaysia) and Sarawak (East Malaysia). The majority of all examined are flightless.

Disersus otongachi/ a new species of Larainae riffle beetles from Ecuador (Coleoptera: Elmidae).

We describe here a new species in the genus Disersus Sharp, 1882 from the Otongachi Reserve in Ecuador. Disersus otongachi sp.nov.

sp. nov., a new spider riffle beetle from Sarawak, and new distribution records for Kodada, Jäch & Čiampor based on DNA barcodes (Coleoptera, Elmidae).

(Coleoptera, Elmidae), a new spider riffle beetle from the Kelabit Highlands (Sarawak, northern Borneo), is described. Illustrations of the habitus and diagnostic characters of the new species and the similar, polymorphic Kodada et al. are presented.

, a new spider riffle beetle species from Borneo, redescription of Jäch including a description of the larva and new distribution data for Jäch using DNA barcodes (Coleoptera, Elmidae).

(Coleoptera, Elmidae) a new spider riffle beetle discovered from northern Borneo (Brunei; Sabah and Sarawak, Malaysia) and the larva of Jäch are described. Illustrations of the habitus and diagnostic characters of the new species and the similar and highly variable are presented. Differences to closely related species, based on DNA barcodes and morphological characters, are discussed.

Taxonomic revision of species complex with new distribution records (Insecta, Coleoptera, Mordellidae).

A taxonomic revision of species related to Schilsky, 1895 is presented. Five species among the complex are recognised: Schilsky, 1895, Ermisch, 1965, Costa, 1854, Compte, 1985, and Franciscolo, 1991. Descriptions, differential diagnoses, an identification key, and new distributional records are provided.

Tepuidessus grulai sp. nov. from Acopán Tepui in Venezuela (Coleoptera: Dytiscidae: Hydroporinae: Bidessini).

We report the discovery of the second Bidessini diving beetle species from a Venezuelan table-top mountain (also referred to as "tepui"). Tepuidessus grulai sp. nov.

Vietelmis jablonskii, a new species of riffle beetle from Laos and Thailand and new faunistic records on Vietelmis Delève, 1968 from Malaysia (Coleoptera: Elmidae).

A new species of riffle beetle, Vietelmis jablonskii, from Laos and Thailand is described and illustrated. Differences to other Vietelmis species are discussed and an identification key for the Vietelmis is presented. New faunistic records are provided for V.

Phanoceroides Hinton, 1939: description of new species, morphology of larvae, and revised taxonomic position of the genus (Coleoptera: Elmidae) based on molecular evidence.

The monotypic genus Phanoceroides was initially classified within the subfamily Elminae, based solely on the distribution and type of pubescence on the body surface. Although a close relationship with Larainae was suggested (Hinton 1939, Maier 2013), its taxonomic position and phylogeny remained unresolved. Based on newly collected material, we describe here P.

Morphometry and redescription of Parahelichus granulosus (Delève, 1974) with description of P. pseudogranulosus, a new cryptic species of Long-toed Water Beetles (Coleoptera: Dryopidae) from Indochinese peninsula, and proposal of a new synonym for Praehelichus sericatus (Waterhouse, 1881) from China.

A new species of Parahelichus Löbl & Smetana, 2006 is described from Laos and Thailand: P. pseudogranulosus. A similar species, P.

Ancyronyx reticulatus and A. pulcherrimus, two new riffle beetle species from Borneo, and discussion about elmid plastron structures (Coleoptera: Elmidae).

Two new species of Ancyronyx Erichson, 1847 (Coleoptera: Elmidae) are described from Borneo: A. pulcherrimus (Brunei) and A. reticulatus (Sabah).

Geoparnus loebli, a new species of terrestrial dryopid from Peninsular Malaysia (Coleoptera: Dryopidae).

Three species have been recognized in the genus Geoparnus Besuchet, 1978, all collected by sifting ground debris from tropical rainforests of Malaysia. The new species Geoparnus loebli sp. nov.