Except Philippines) and Australian Region (Coleoptera: Hydrophilidae: Acidocerinae)
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Koleopterologische Rundschau 89 151–316 Wien, September 2019 Taxonomic revision of Agraphydrus RÉGIMBART, 1903 III. Southeast Asia (except Philippines) and Australian Region (Coleoptera: Hydrophilidae: Acidocerinae) A. KOMAREK Abstract The species of Agraphydrus RÉGIMBART, 1903 from Australia, Brunei, Indonesia, Laos, Malaysia, Myanmar, Papua New Guinea, Thailand, and Vietnam are revised. Agraphydrus biprojectus MINOSHIMA, KOMAREK & ÔHARA, 2015, A. coronarius MINOSHIMA, KOMAREK & ÔHARA, 2015, A. geminus (ORCHYMONT, 1932), A. jaechi (HANSEN, 1999), A. malayanus (HEBAUER, 2000), A. orientalis (ORCHYMONT, 1932), A. regularis (HANSEN, 1999), A. siamensis (HANSEN, 1999), and A. thaiensis MINOSHIMA, KOMAREK & ÔHARA, 2015 are redescribed. Sixty new species are described: A. anacaenoides, A. angulatus, A. bacchusi, A. balkeorum, A. borneensis, A. brevipenis, A. burmensis, A. carinatulus, A. cervus, A. clarus, A. delineatus, A. engkari, A. excisus, A. exiguus, A. floresinus, A. hamatus, A. helicopter, A. hendrichi, A. heterochromatus, A. hortensis, A. imitans, A. infuscatus, A. jankodadai, A. kathapa, A. laocaiensis, A. latus, A. lunaris, A. maehongsonensis, A. manfredjaechi, A. mazzoldii, A. microphthalmus, A. mirabilis, A. muluensis, A. musculus, A. namthaensis, A. nemo- rosus, A. nigroflavus, A. obesus, A. orbicularis, A. pallidus, A. papuanus, A. penangensis, A. piceus, A. raucus, A. reticulatus, A. rhomboideus, A. sarawakensis, A. schoedli, A. scintillans, A. shaverdoae, A. skalei, A. spadix, A. spinosus, A. stramineus, A. sucineus, A. sundaicus, A. tamdao, A. tristis, A. tu- lipa, A. vietnamensis. Agraphydrus superans (HEBAUER, 2000) is synonymized with A. jaechi. The genus Agraphydrus is recorded from Brunei for the first time. Agraphydrus activus KOMAREK & HEBAUER, 2018 is recorded from Thailand for the first time, A. coomani (ORCHYMONT, 1927) is recorded from Brunei, Indonesia, Laos, Myanmar, and Thailand for the first time, A. arduus KOMAREK & HEBAUER, 2018, A. biprojectus MINOSHIMA, KOMAREK & ÔHARA, 2015, A. confusus KOMAREK & HEBAUER, 2018 from Laos, A. masatakai MINOSHIMA, KOMAREK & ÔHARA, 2015 from Myanmar and Vietnam. Agraphydrus anhuianus (HEBAUER, 2000) and A. malayanus were erro- neously recorded from Thailand by MINOSHIMA, KOMAREK & ÔHARA (2015), resp. by HEBAUER (2000). Agraphydrus anhuianus is so far confirmed only for China (Anhui), and therefore it is here excluded from the fauna of Southeast Asia. A total of eighty described species is now known from Southeast Asia and the Australian Region. Agraphydrus coomani is widespread in the Oriental and Australian regions, while most of the other species are restricted to one or two countries. Thirty-one species were collected in Malaysia, 17 in Thailand as well as in Indonesia, 16 in Vietnam, and only one species is known from Australia. Eleven of the species were collected also in China, A. connexus and A. coomani also on the Indian Subcontinent. The habitat of six species is unknown, all other species were collected in aquatic habitats. Fifteen species were collected at light, at least some species were found in hygropetric habitats. Habitus, male genitalia and other morphological details are illustrated, distribution maps are pre- sented, and a key to the species is added. Key words: Coleoptera, Hydrophilidae, Agraphydrus, revision, taxonomy, new species, key to species, Oriental Region, Australian Region, Australia, Brunei, Indonesia, Laos, Malaysia, Myanmar, Papua New Guinea, Thailand, Vietnam. 1942617_Kern.indd 153 08.10.19 16:55 152 Koleopt. Rdsch. 89 (2019) Introduction The area considered in this study comprises the eastern Oriental Region (except the Philippines) and the Australian Region. Australia, Brunei, Indonesia, Laos, Malaysia, Myanmar, Papua New Guinea, Thailand, and Vietnam cover together an area of more than 12 million km² with more than 18,000 islands. As far as known, William Doherty (1857−1901) was the first entomologist, who collected Agraphydrus specimens in Southeast Asia, but they remained undescribed until today. The first species described from Southeast Asia were collected by Albert de Cooman (1880–1967) in Vietnam and by August Thienemann (1882–1960) in Indonesia (Sumatra, Java and Bali) in the early 20th century: Agraphydrus coomani (ORCHYMONT, 1937), A. geminus (ORCHYMONT, 1932) and A. orientalis (ORCHYMONT, 1932). They were originally assigned to the genus Helochares MULSANT, 1844. SATÔ (1965) re-established the genus Agraphydrus RÉGIMBART, 1903 and transferred Helochares orientalis to Agraphydrus. Subsequently, H. coomani and H. geminus were transferred to Agraphydrus by WATTS (1995) resp. HANSEN (1991). In Australia, specimens of Agraphydrus were collected by about 25 collectors in almost all states and territories between 1965 and 2000. In Southeast Asia and Papua New Guinea numerous journeys by more than 70 collectors yielded thousands of specimens since 1964. Among the first travels were those of M.E. Bacchus to Papua New Guinea in 1964 and 1965, and to Borneo in 1977. In the last three decades, collecting activities were most productive, notably those of M.A. Jäch (27 spp.), J. Kodada (13 spp.), P. Mazzoldi (13 spp.), H. Schillhammer (11 spp.), H. Zettel (11 spp.), F. Čiampor (9 spp.), S. Schödl (8 spp.), M. Satô (8 spp.), P. Pacholátko & L. Dembický (8 spp.), as well as M. Balke, D. Boukal, D. Burckhardt, D. Dudgeon, H. Forster, L. Hendrich, J. Horák, E. Jendek, I. Löbl, M. Madl, H. Malicky, Y. Minoshima, R. Schuh, H. Shaverdo, W.D. Shepard, R.W. Sites, A. Skale, A. Weigel, and others. HANSEN (1999a) erected the genus Megagraphydrus, to which the following species were assigned: M. attenuatus HANSEN, 1999, M. jaechi HANSEN, 1999, M. regularis HANSEN, 1999, M. siamensis HANSEN, 1999, M. anhuianus HEBAUER, 2000, M. malayanus HEBAUER, 2000, and M. superans HEBAUER, 2000. MINOSHIMA, KOMAREK & ÔHARA (2015) synonymized Meg- agraphydrus with Agraphydrus, transferred these seven species to Agraphydrus and described four new species: A. biprojectus MINOSHIMA et al., 2015, A. coronarius MINOSHIMA et al., 2015, A. masatakai MINOSHIMA et al., 2015, and A. thaiensis MINOSHIMA et al., 2015. Recently, eight species were described from China, which occur also in some countries considered here: Agraphydrus activus KOMAREK & HEBAUER, 2018, A. agilis KOMAREK & HEBAUER, 2018, A. arduus KOMAREK & HEBAUER, 2018, A. confusus KOMAREK & HEBAUER, 2018, A. connexus KOMAREK & HEBAUER, 2018, A. igneus KOMAREK & HEBAUER, 2018, A. lon- gipenis KOMAREK & HEBAUER, 2018, and A. setifer KOMAREK & HEBAUER, 2018. Sixty new species are described in this contribution. Material and methods More than 3,600 specimens of Agraphydrus, collected in Australia, Brunei, Indonesia, Laos, Malaysia, Myanmar, Papua New Guinea, Thailand, and Vietnam, were examined. No properly identified species of the genus Agraphydrus has ever been recorded from the Philippines so far. However, at least ten unidentified species from several Philippine islands are deposited in various collections (see FREITAG et al. 2016). They shall be treated in a forthcoming contribution. For methods concerning illustrations see KOMAREK (2018). 1942617_Kern.indd 154 08.10.19 16:55 KOMAREK: Revision of Agraphydrus III. Southeast Asia and Australian Region (HYDROPHILIDAE) 153 Within the precisely cited label data square brackets “[…]” are used for remarks by the author, a backslash “\” indicates the change of line, a straight line “|” the change of label. Additional notes on geographical and/or ecological details are based on personal information by the collectors. Morphological terms used in this contribution are explained in KOMAREK & HEBAUER (2018). Abbreviations C.I. clypeal index = ratio greatest width / median length of clypeus anterior to eyes E.I. elytral index = ratio greatest elytral length / greatest elytral width P.I. pronotal index = ratio greatest pronotal width / median pronotal length ANIC Australian National Insect Collection (CSIRO), Canberra, Australia (A. Slipinsky, C. Lemann) CAS California Academy of Sciences, San Francisco, USA (D. Kavanaugh, N.D. Penny, C. Grinter) CHB Coll. Lars Hendrich, München, Germany CSH Coll. Andre Skale, Hof, Germany EEM Enns Entomology Museum, Missouri, USA (R.W. Sites) EUM Ehime University, Matsuyama, Japan (H. Yoshitomi) HUB Museum für Naturkunde – Leibniz Institute for Evolution and Biodiversity Science, Berlin, Germany (J. Frisch) ISNB Institut des Sciences naturelles de Belgique, Bruxelles, Belgium (P. Limbourg, Y. Gérard) KMNH Entomological Laboratory, Kyushu University, Fukuoka, Japan (Y. Minoshima) MHNG Muséum d’histoire naturelle, Genève, Switzerland (G. Cuccodoro) MNS Museum für Naturkunde, Stuttgart, Germany (A. Faille, C. König, W. Schawaller) MTD Senckenberg Naturhistorische Sammlungen Dresden (Museum für Tierkunde), Germany (O. Jäger) MZB Museum Zoologicum Bogoriense, Cibinong, Indonesia (D. Peggie) NHM Natural History Museum, London, U.K. (C. Taylor) NME Naturkundemuseum Erfurt, Germany (A. Weigel, A. Skale) NMP National Museum, Prague, Czechia (M. Fikáček) NMW Naturhistorisches Museum Wien, Austria (M.A. Jäch) SEMC Biodiversity Institute, University of Kansas, Lawrence, USA (A.E.Z. Short) ZMUC Zoological Museum, University of Copenhagen, Denmark (A. Solodovnikov, S.G. Selvantharan) ZSM Zoologische Staatssammlung München, Germany (M. Balke) Checklist of the Agraphydrus species of Southeast Asia and the Australian Region 1. A. activus KOMAREK & HEBAUER, 2018 CHINA, THAILAND 2. A. agilis KOMAREK & HEBAUER, 2018 CHINA, VIETNAM 3. A. anacaenoides