New species of the Rhagovelia orientalis species group (Hemiptera: Heteroptera: Veliidae).

Three new species of the Rhagovelia orientalis species group are described from the Philippines: R. sophiae sp.n.

Contributions to the knowledge of water bugs in Mindoro Island, Philippines, with a species checklist of Nepomorpha and Gerromorpha (Insecta, Hemiptera, Heteroptera).

Background: This survey aims to provide an updated species checklist of aquatic and semi-aquatic bugs in the intra-Philippine biogeographic Region of Mindoro. An assessment survey of water bugs (Hemiptera, Heteroptera) was conducted mostly by manual collection in selected areas of Oriental Mindoro from 2017 to 2018, in which some of the collecting activities were undertaken by graduate students of Ateneo de Manila University.

New Information: Twenty-nine aquatic and semi-aquatic heteropteran species were documented and some are known island-endemic species or subspecies, including Nieser & Zettel, 1999, Zettel, 2003, Zettel & Pangantihon, 2010, Zettel, 1994, Zettel, 1994, Zettel, 1996 and Lansbury & Zettel, 1997, which were found in new areas in the Region.

Aphelocheirus narumonae sp.n., second species of the subgenus Micraphelocheirus Hoberlandt amp; Štys, 1979 (Hemiptera: Aphelocheiridae) from Thailand.

Aphelocheirus (Micraphelocheirus) narumonae sp.n. from northeastern Thailand is described.

Volatiles from the Mandibular Gland Reservoir Content of Laciny and Zettel, 2018, Worker Ants (Hymenoptera: Formicidae).

Forty-five volatile organic compounds (VOCs) were identified or annotated in the mandibular gland reservoir content (MGRC) of the Southeast Asian ant Laciny and Zettel, 2018 (Hymenoptera: Formicidae), using headspace solid-phase microextraction (HS-SPME) coupled to gas chromatography mass spectrometry (GC-MS) and liquid extraction combined with GC-MS. In extension of previous reports on VOCs of , members of different compound classes, such as alkanes, aliphatic and aromatic carboxylic acids, and phenolics, were detected. The ketone 2-heptanone and the biochemically related phenolics benzene-1,3,5-triol (phloroglucinol, PG), 1-(2,4,6-trihydroxyphenyl)ethanone (monoacetylphloroglucinol, MAPG), 5,7-dihydroxy-2-methylchromen-4-one (noreugenin), and 1-(3-Acetyl-2,4,6-trihydroxyphenyl)ethanone (2,4-diacetylphloroglucinol, DAPG) dominated the GC-MS chromatograms.

Isolation of Mandibular Gland Reservoir Contents from Bornean 'Exploding Ants' (Formicidae) for Volatilome Analysis by GC-MS and MetaboliteDetector.

The aim of this manuscript is to present a protocol describing the metabolomic analysis of Bornean 'exploding ants' belonging to the Colobopsis cylindrica (COCY) group. For this purpose, the model species C. explodens is used.

sp. n., model species for studies on "exploding ants" (Hymenoptera, Formicidae), with biological notes and first illustrations of males of the group.

A taxonomic description of all castes of Laciny & Zettel, from Borneo, Thailand, and Malaysia is provided, which serves as a model species for biological studies on "exploding ants" in Southeast Asia. The new species is a member of the (COCY) group and falls into a species complex that has been repeatedly summarized under the name (Emery, 1889) (formerly ). The COCY species group is known under its vernacular name "exploding ants" for a unique behaviour: during territorial combat, workers of some species sacrifice themselves by rupturing their gaster and releasing sticky and irritant contents of their hypertrophied mandibular gland reservoirs to kill or repel rivals.

The "Italian hebrid", Hebrus franzi (Wagner, 1957): disentangling a half-century dilemma (Hemiptera: Heteroptera: Gerromorpha).

Hebrus franzi (Wagner, 1957) was described from the Apuan Alps (Tuscany, Italy) and not found again for several decades despite intensive search. We report on new collections that expand the known distribution area considerably, provide a redescription, and give first insights regarding the ecology of this remarkable flightless species.

A new species of open-air processional column termite, Hospitalitermes nigriantennalis sp. n. (Termitidae), from Borneo.

A new species of open-air processional column termite is here described based on the soldier and worker castes from eight colonies in north Barito, central Kalimantan. Hospitalitermes nigriantennalis sp. n.

On the identity of the tiger beetle Cicindela philippinensis Mandl, 1956 (Coleoptera: Carabidae: Cicindelinae).

In the course of preparing a key to the Philippine tiger beetle genera (Pangantihon & Zettel, in prep.) it became necessary to examine the holotype of Cicindela philippinensis Mandl, 1956, the only specimen from the Philippines that has been tentatively assigned to the genus Myriochila Motschulsky, 1857.

A Falsification of the Citation Impediment in the Taxonomic Literature.

Current science evaluation still relies on citation performance, despite criticisms of purely bibliometric research assessments. Biological taxonomy suffers from a drain of knowledge and manpower, with poor citation performance commonly held as one reason for this impediment. But is there really such a citation impediment in taxonomy? We compared the citation numbers of 306 taxonomic and 2291 non-taxonomic research articles (2009-2012) on mosses, orchids, ciliates, ants, and snakes, using Web of Science (WoS) and correcting for journal visibility.

Two new species of Pleciobates (Hemiptera: Gerromorpha: Gerridae) from India, with a key to the species of Pleciobates.

Two new species of water striders in the genus Pleciobates are described from India and compared with allied species. Pleciobates bengalensis Jehamalar, Basu & Zettel sp. nov.

A molecular phylogeny of the pan-tropical pond skater genus Limnogonus Stål 1868 (Hemiptera-Heteroptera: Gerromorpha-Gerridae).

We investigated phylogenetic relationships among pond skaters (Heteroptera: Gerridae) of the genus Limnogonus Stål 1868 by performing separate and combined parsimony analyses of DNA sequences from three mitochondrial (COI+II, 16SrRNA) and one nuclear (28SrRNA) gene(s). The taxon sample represented almost two thirds of the known diversity, and with most taxa represented by two or more individuals. A simultaneous analysis of all data showed that L.