2019 ACTA ENTOMOLOGICA 59(1): 253–272 MUSEI NATIONALIS PRAGAE doi: 10.2478/aemnp-2019-0021 ISSN 1804-6487 (online) – 0374-1036 (print) www.aemnp.eu RESEARCH PAPER Aquatic Coleoptera of North Oman, with description of new species of Hydraenidae and Hydrophilidae Ignacio RIBERA1), Carles HERNANDO2) & Alexandra CIESLAK1) 1) Institute of Evolutionary Biology (CSIC-Universitat Pompeu Fabra), Passeig Maritim de la Barceloneta 37, E-08003 Barcelona, Spain; e-mails:
[email protected],
[email protected] 2) P.O. box 118, E-08911 Badalona, Catalonia, Spain; e-mail:
[email protected] Accepted: Abstract. We report the aquatic Coleoptera (families Dryopidae, Dytiscidae, Georissidae, 10th June 2019 Gyrinidae, Heteroceridae, Hydraenidae, Hydrophilidae and Limnichidae) from North Oman, Published online: mostly based on the captures of fourteen localities sampled by the authors in 2010. Four 24th June 2019 species are described as new, all from the Al Hajar mountains, three in family Hydraenidae, Hydraena (Hydraena) naja sp. nov., Ochthebius (Ochthebius) alhajarensis sp. nov. (O. punc- tatus species group) and O. (O.) bernard sp. nov. (O. metallescens species group); and one in family Hydrophilidae, Agraphydrus elongatus sp. nov. Three of the recorded species are new to the Arabian Peninsula, Hydroglyphus farquharensis (Scott, 1912) (Dytiscidae), Hydraena (Hydraenopsis) quadricollis Wollaston, 1864 (Hydraenidae) and Enochrus (Lumetus) cf. quadrinotatus (Guillebeau, 1896) (Hydrophilidae). Ten species already known from the Arabian Peninsula are newly recorded from Oman: Cybister tripunctatus lateralis (Fabricius, 1798) (Dytiscidae), Hydraena (Hydraena) gattolliati Jäch & Delgado, 2010, Ochthebius (Ochthebius) monseti Jä ch & Delgado 2010, Ochthebius (Ochthebius) wurayah Jäch & Delgado, 2010 (all Hydraenidae), Georissus (Neogeorissus) chameleo Fikáč ek & Trávní č ek, 2009 (Georissidae), Enochrus (Methydrus) cf.