Rodzay Abdul Wahab

Synonymy of Discotettix adenanii Mahmood, Idris & Salmah, 2007 with D. belzebuth (Serville, 1838) (Orthoptera: Tetrigidae).

According to a study of type specimens of Discotettix adenanii Mahmood, Idris & Salmah, 2007 and copious specimens of D. belzebuth (Serville, 1838) collected in different parts of Borneo, we found that all species-specific morphological characters of D. adenanii, according to its original description, fall into the morphological variability of D. belzebuth. Thus, we synonymize D. adenanii with D. belzebuth. The sequence of a segment of the mitochondrial 16S ribosomal RNA of D. belzebuth was also evaluated and added to GenBank as a DNA barcode.

Two new species of Sycorax (Diptera: Psychodidae: Sycoracinae) from the Oriental Region.

Two new species of Sycorax Haliday in Curtis, 1839 are described from Ulu Temburong National Park in Brunei Darussalam: Sycorax konopiki sp. nov. and S. tomkineana sp. nov. Both species were found resting on two frog species: Ansonia leptopus (Günther, 1872) and A. longidigita Inger, 1960. Differential diagnoses for males are included and morphological characters illustrated. Possible host associations of the new species are briefly discussed. DNA barcode sequence (COI) for Sycorax konopiki sp. nov. is also provided.

A new species of Tapiena (Orthoptera: Tettigonioidea: Phaneropterinae) from Brunei Darussalam (Borneo, Southeast Asia)

There are now more than 28,000 described orthopterans globally (Cigliano et al., 2018) and this figure is likely to increase in the future. The same is true for Southeast Asia, where we are still at a stage of discovering species new to science, and this is partly an artefact of incomplete sampling (Tan et al., 2017a). In one of the most popular biodiversity hotspots, i.e., Borneo, is the Kuala Belalong Field Studies Centre. It is located in the primary lowland and ridge dipterocarp forests of the Ulu Temburong National Park, Brunei Darussalam. Recent collection of orthopterans in the area led to the discovery of several new species of katydids (Tan et al., 2017b; Tan Wahab, 2017a) and crickets (Tan et al., 2017c; Tan Wahab, 2017b). Here, we describe another new species of katydid, from the genus Tapiena Bolívar, 1906. Tapiena currently consists of 26 species (Tan et al., 2015) and is distributed around Asia and even Africa. In Borneo, only one species is known: Tapiena incisa Karny, 1923 from Sarawak (see Karny, 1923). The new species Tapiena paraincisa sp. nov. represents the second species described from Borneo.

New taxa and notes on crickets of the subfamily Landrevinae (Orthoptera: Gryllidae) from Brunei Darussalam, Borneo

New taxa from the subfamily Landrevinae (Orthoptera: Gryllidae) are expected despite recent work on its taxonomy. Here, two more new species from Brunei Darussalam, Borneo are described: Duolandrevus (Eulandrevus) kawataredoki sp. nov. and Endodrelanva nympha sp. nov. The male calling song of D. (E.) kawataredoki sp. nov. is also described. We report the occurrence of a Duolandrevus (Bejorama) from Brunei close to (nr.) luzonensis Otte, 1988. We also document from Brunei a case of parasitic wasp from the genus Liris (Hymenoptera: Crabronidae: Larrini) hunting a Landrevinae.

New taxa and notes of katydids from the tribe Meconematini (Orthoptera: Meconematinae) from Brunei Darussalam (Part 2)

Based on extended surveys in Kuala Belalong Field Studies Centre, Brunei Darussalam, one new species of Kuzicus is described here: Kuzicus mirabilis sp. nov. This represents the first species described from Borneo for this Asiatic genus. The female of Pulchroteratura huiqing Tan et al., 2017 is described here, first time for the genus. The females of Leptoteratura (Rhinoteratura) chela Tan et al., 2017 and Pseudoteratura (Pseudoteratura) kenuan Tan et al., 2017 are also described for the first time.

Macroinvertebrate trophic structure on waterfalls in Borneo

Waterfalls have unique physical characteristics and harbour highly specialised macroinvertebrate communities, but have been the subject of very few ecological studies. There are no previous studies of trophic structure of waterfall assemblages. It was hypothesised that because of the steep gradient of waterfalls and low retention of terrestrial-based resources, the abundant basal food resources would be periphyton. In addition, because of the frequent scouring flood events, it was predicted that periphyton would be a significant source of food for filter feeders. Waterfalls in the Ulu Temburong National Park (Brunei Darussalam) were used in the present case study. Methods included stable carbon (C)- and nitrogen (N)-isotope analyses (SIA; δ13C and δ15N of leaf litter and periphyton) and gut-content analysis (GCA) of the most the abundant macroinvertebrates. With δ15N values ranging from –1.9 to 5.5‰, literature suggests that this indicates that herbivores (Heptageniidae and Blephariceridae), omnivores (Simuliidae and Hydropsychidae) and predators (Buccinidae) live in the waterfalls. Apart from Buccinidae, the taxa had δ13C signatures ranging from –33 to –26‰, with a high dependence on periphyton, which is similar to other tropical-stream biotopes. The present study suggests that despite scouring velocities, waterfalls support animals with a range of diets, based on grazing or scraping, filter feeding and predation.

Diversity of manota williston (Diptera, mycetophilidae) in ulu temburong national park, brunei.

Abstract A total of 15 species of Manota Williston, 1896 are recorded from Brunei, based on the investigations in 2013-2014. Thirteen species are recorded from Ulu Temburong National Park and three species from the Universiti Brunei Darussalam Campus in Tungku. Six species are described as new to science: Manota belalongensis sp. n., M. kaspraki sp. n., M. macrothrix sp. n., M. megachaeta sp. n. and M. pileata sp. n. from Ulu Temburong, and M. ricina sp. n. from Tungku. New records of the following species are given: Manota bifida Hippa & Papp, M. bruneiensis Hippa & Ševčík, M. hyboloma Hippa & Ševčík, M. oligochaeta Hippa, M. pappi Hippa, M. perangulata Hippa & Ševčík, M. pollex Hippa, M. procera Hippa and M. simplex Hippa.

Notes on the taxonomy of poorly known Gryllacrididae (Stenopelmatoidea) from Brunei Darussalam, Borneo

Gryllacrididae, or raspy crickets, belong to the monophyletic clade Stenopelmatoidea, and have complex taxonomy. Many genera require revision, including the ones from Southeast Asia. Orthopteran surveys in Kuala Belalong, Brunei Darussalam, Borneo led to the discovery of a new species of apterous gryllacridid from Brunei Darussalam: Melaneremus? bellus sp. nov. We also redescribe Phlebogryllacris venosa (Walker, 1869) and provide images of this species of both live and preserved specimens. In the process of describing, specimens from morphologically similar genera were also examined. We provide some notes on these genera to aid future taxonomic studies.

Taxonomic revision of the endemic Bornean genera Anexodus Pascoe and Pantilema Aurivillius (Coleoptera, Cerambycidae, Lamiinae)

Abstract The genera Anexodus Pascoe, 1866 and Pantilema Aurivillius, 1911 (Cerambycidae: Lamiinae: Morimopsini), both endemic to Borneo, are revised. Four species of Anexodus are recognized: A. aquilus Pascoe, 1886 (Malaysia: Sabah), A. sarawakensis Sudre, 1997 (Malaysia: Sarawak), A. syptakovae sp. n. (Malaysia: Sarawak), and A. tufi sp. n. (Brunei). Pantilema is a monotypic genus containing P. angustum Aurivillius, 1911 (Malaysia: Sarawak) which is known only from the holotype. For the first time, genital structures are studied in these genera. An identification key for the species of Anexodus is provided and their intraspecific morphological variability and distributions are discussed.