Order Coleoptera, family Dytiscidae

Transcription

1 Arthropod fauna of the UAE, 4: Date of publication: INTRODUCTION Order Coleoptera, family Dytiscidae Jiří Hájek and Michel Brancucci The Dytiscidae are the most speciose family of water beetles within the suborder Adephaga. More than 4000 species (Nilsson, 2001) occur in most running and stagnant freshwater habitats in all zoogeographic regions of the world. More details of the morphology, biology and taxonomy of diving beetles can, for example, be found in Balke (2005). There is a long history of research on the water beetles of the Arabian Peninsula. The first species were described by Klug (1834), further species were described by Walker (1871), and two new species from Arabia were included in Sharp s (1882) monograph. Régimbart (1897) described two new species and recorded two others from Oman, while Gahan (1895) presented new records from Yemen. In the twentieth century, Balfour-Browne (1951) identified water beetle families from the British expeditions to south-west Arabia and Guignot (1951) described a new species from Yemen. However, systematic research on the fauna of the Arabian Peninsula started with the foundation of the project Fauna of Saudi Arabia (recently renamed Fauna of Arabia ). The adephagous water beetle families were revised by Brancucci (1979, 1980, 1981, 1985). During the same period, Rocchi (1985) added new data for Yemen Arab Republic and a single dytiscid species was recorded from Qatar by Abdu & Shaumar (1985). Most recently, Wewalka (1992) described a new species from Yemen, Wewalka & Biström (1998) and Pederzani (2003) described new taxa from Oman, Wewalka (2004) summarised the Dytiscidae from Socotra Island, and Hájek & Wewalka (2009) studied Arabian species of the genus Hydroglyphus Motschulsky, The dytiscid fauna of the territory of the United Arab Emirates (UAE) is an almost completely unknown component of the fauna of the Arabian Peninsula. Van Harten (2005) listed a single species of Dytiscidae the cosmopolitan species Eretes sticticus (Linnaeus, 1767) from the UAE. Nevertheless, the extensive entomological research of Antonius van Harten in the years , together with several expeditions of other entomologists revealed the presence of 18 species of Dytiscidae, including two species new to science, and enables us to fill this gap in the knowledge of the fauna of the UAE MATERIALS AND METHODS Most of the material included in this work came from the extensive entomological research of A. van Harten and his co-workers. This material is stored in tubes in ethanol and it is divided between the Naturhistorisches Museum in Basel, Switzerland (NHMB) and Národní Muzeum in Prague, Czech Republic (NMPC). Voucher specimens will also be deposited in the UAE Invertebrate Collection (UAEIC). The material collected by the Czech entomologists J. Batelka and H. Pinda is deposited in NMPC and in the private collection of J. Batelka, Prague, Czech Republic (JBCP), material collected by M.A. Jäch and K. Mahmood is deposited in the Naturhistorisches Museum Wien, Austria (NHMW), and that collected by I. Ribera et al. in the Museo Nacional de Ciencias Naturales, Madrid, Spain (CSIC). Some specimens from the collection of the Natural History Museum, London, Great Britain (BMNH) were studied as well, as was a specimen from the Staatliches Museum für Naturkunde, Stuttgart, Germany (SMNS).

2 Order Coleoptera, family Dytiscidae 127 The species are arranged alphabetically in the systematic account. The nomenclature follows Nilsson (2001); the classification of the tribe Hydaticini follows the most recent generic revision published by Miller et al. (2009), with the exception that Prodaticus Sharp, 1882, is treated as a subgenus of Hydaticus Leach, 1817 which, in our opinion, supports the stability of the nomenclature. As all the recorded species can be identified from photographs of their habitus, we have not included an additional diagnosis for previously described taxa. The photographs of all specimens were taken with a Canon EOS 550D digital camera with Canon MP-E 65 mm objective. Images of the same specimen at different focal planes were combined using Helicon Focus software. The exact label data of the type material of the newly described species are cited. A forward slash (/) separates individual lines and a double slash (//) individual data labels. Authors remarks are included in square brackets. Abbreviations used in the text are: NARC = National Avian Research Centre; LT = light trap; MT = Malaise trap; WT = water trap; AvH = leg. A. van Harten. SYSTEMATC ACCOUNT Subfamily Copelatinae Branden, 1885 Tribe Copelatini Branden, 1885 Copelatus antoniorum Hájek & Brancucci nov. spec. Plates 1 2, Figures 1 3 Specimens examined: Holotype (NMPC), labelled: OMAN: Batinah Prov. / WADI BANI AWF / oasis and stream with pools / N, E, 543 m / Antonín Reiter leg., 18.x.2009 [printed] // HOLOTYPE / COPELATUS / antoniorum sp. nov. / J. Hájek & M. Brancucci det [red label, printed]. Paratypes: 1 9, same label data as holotype (BMNH, NHMB, NMPC); 1 1, 6 Oman J. Al-Akhdar / wadi Bani Awf residual pools / N E m / Ribera, Cieslak & Hernando leg. [printed] (CISC); 1, Oman: Wadi Abyadh / N, E / 21.XII.1994, 230m / 8650 / lg.md Gallagher & B Skule [printed] // Aglymbus / gestroi Sharp [handwritten] / det.m.brancucci [printed] 95 [handwritten] (Staatliches Museum für Naturkunde, Stuttgart, Germany). 1 1, U.A.E. / Bitnah (light trap) / 31.xii ii.2006 / A. van Harten leg. ([loc. no.] 6085) [printed] (NMPC); 1, U.A.E i.2006 / Wadi Safad (water trap) / 25.13N 56.19E / A. van Harten leg. ([loc. no.] 4747) [printed] (NMPC); 1, U.A.E iii.2006 / Wadi Safad (light trap) / 25.13N 56.19E / A. van Harten leg. ([loc. no.] 10926) [printed] (NHMB); 1, U.A.E iii.2006 / near Mahafiz (light trap) / 25.09N 55.48E / A. van Harten leg. ([loc. no.] 8660) [printed] (NMPC); 3 4, U.A.E. 27.iv-4.v.2006 / Wadi Maidaq (light trap) / 25.18N 56.07E / A. van Harten leg. ([loc. no.] 4801) [printed] (NHMB, NMPC); 2, U.A.E ii.2006 / Wadi Maidaq (light trap) / 25.18N 56.07E / A. van Harten leg. ([loc. no.] 4996) [printed] (NHMB, NMPC); 1, U.A.E v.2006 / Fujairah (light trap) / 25.08N 56.21E / A. van Harten leg. ([loc. no.] 4841) [printed] (NMPC); 1, U.A.E. 31.v-7.vi.2006 / Sharjah x Khor Kalba / (light trap) / van Harten leg. ([loc. no.] 7104) [printed] (NMPC); 1 2, U.A.E viii.2006 / Hatta (light trap) / 24.49N 56.07E / A. van Harten leg. ([loc. no.] 10958) [printed] (NHMB, NMPC); 1, U.A.E iii.2007 / Sharjah Desert Park / 25.17N 55.42E (light trap) / A. van Harten leg. ([loc. no.] 7069) [printed] (NMPC); 2 3, U.A.E iv.2009 / Wadi Wurayah farm / (light trap) / A. van Harten leg. ([loc. no.] 10990) [printed] (NHMB, NMPC). Each paratype is provided with a red label similar to that of the holotype, except for the word PARATYPE instead of the word HOLOTYPE, and the respective sex symbol. Description: Elongate oval; Head semicircular, clypeus nearly straight. Pronotum widest at base, convex. Sides of pronotum regularly rounded. Elytra nearly subparallel, except for apex (Fig. 1). Measurements: Body length mm (holotype 5.4 mm), width mm (holotype 2.3 mm).

3 128 J. Hájek & M. Brancucci Figures 1 3 Copelatus antoniorum nov. spec. 1: Habitus; 2: Median lobe in lateral view; 3: Paramere. Scale bars: 1 mm (Fig. 1); 0.5 mm (Figs 2 3). Colouration. Body colouring ferrugineous, appendages, sides of pronotum and indistinct transverse basal band on elytra lighter. Surface sculpture. Head. Microsculpture consisting of a fine and superficial microreticulation with small and uniform polygonal meshes as well as a fine punctation: punctures fine, particularly on clypeus and on frons, becoming coarser and denser on vertex. Rows of coarse punctures along eye margins and in small depressions antero-laterally to eyes. Antenna with antennomeres long and slender, the 5 th almost 3 times longer than broad. Pronotum. Transverse; lateral margins gently bent and very finely bordered. Microsculpture consisting of fine and slightly impressed meshes, similar to that of head. Punctation consists of sparsely distributed very small punctures, and coarse setigerous punctures along anterior margin, on latero-basal quarter and posteriorly in front of corner strongly impressed; punctures dense and coalescent. Elytra uniformly reticulated, reticulation consisting of small polygonal meshes. Punctation consists of coarse, and very small and very fine punctures, hardly visible. Coarse punctures form an indistinct row along suture, three distinct longitudinal rows on disc, and one lateral row; rows of punctures well marked on apical part, getting sparser and smaller towards base. Additional coarse punctures are present between third discal and lateral row, and along lateral margin. Distance between suture and first discal row is twice as broad as distance between other discal rows of punctures.

4 Order Coleoptera, family Dytiscidae 129 Ventral part. Finely microreticulated, intermixed with very small sparsely distributed punctures. Meshes polygonal (isodiametric), except for metacoxae and abdominal ventrite I (longitudinal), abdominal ventrite II (diagonal), and abdominal ventrites III IV (transverse). Prosternum obtusely keeled medially. Prosternal process obtusely lanceolate, bordered. Metepisterna ( metasternal wings ) tongue-shaped, slender. Line delimiting metacoxae present, but incomplete. Metacoxae and abdominal ventrites I II with numerous striae, possibly for stridulation. Indistinct transverse rows of large setigerous punctures are present on abdominal sternites. Male. Pro- and mesotarsomeres 1 3 distinctly broadened, with adhesive discs on their ventral side. Median lobe of aedeagus as depicted in Figure 2. Lateral lobe (paramere) broad, nearly semicircular, apically with long setae along inner margin (Fig. 3). Female. Punctation on head slightly coarser than in male. Sides of pronotum with short striolation. Elytra with rows of coarse punctures as in male; but unlike male, discal rows of punctures connected by weak, sometimes interrupted striae. Additional weak longitudinal stria presents in apical half of interspace between suture and first discal row of punctures. Short irregular striolae present in interspaces between second stria (first discal row of punctures) and lateral margin of elytra. Pro- and mesotarsomeres 1 3 not broadened. Differential diagnosis: The habitus of the new species is very similar to that of C. gestroi (Sharp, 1882) described from Ethiopia and recorded also from Egypt, Sinai, Israel, Saudi Arabia and Oman (Nilsson, 2009). However, it is slightly smaller and almost uniformly ferrugineous coloured; the basal testaceous band is not so distinctly delimited as in C. gestroi. The microsculpture of Copelatus antoniorum nov. spec. is also more superficial and less coarse than in C. gestroi. Finally, the new species differs also in the shape of the male median lobe (cf. Wewalka, 1974: Fig. 7), which is long, strongly curved and very slender. The female of C. antoniorum nov. spec. differs from C. gestroi in having four distinguishable longitudinal true striae on the disc of the elytra, and striolate interspaces between the second stria and the lateral margin of the elytra. Notes on generic classification: C. gestroi was originally described in the genus Aglymbus Sharp, 1882, based on the partly reduced metacoxal lines. This genus was recently studied by Shaverdo et al. (2008) using morphological and molecular methods. They limited Aglymbus to a strictly Neotropical genus, placed the Madagascan species previously associated with Aglymbus in the new genus Madaglymbus Shaverdo & Balke, 2007, and transferred the Ethiopian species to the genus Copelatus Erichson, Following this work, we also placed our species in Copelatus. Habitats and methods of collection: The specimens from the type locality were collected in small pools formed by a stream in a wadi (Plates 20 21). The specimens from the United Arab Emirates were mostly collected at light. Distribution: The species is so far only known from several localities in northern Oman and the UAE. Etymology: The new species is dedicated to its collectors: Antonius van Harten (Sharjah, United Arab Emirates) and Antonín Reiter (Čížov, Czech Republic). Subfamily Dytiscinae Leach, 1815 Tribe Cybistrini Sharp, 1882 Cybister (Cybister) tripunctatus lateralis (Fabricius, 1798) Plate 3 Specimens examined: Sharjah-Khor Kalba, near tunnel, 1, 24.iii.2010, leg. K. Mahmood.

5 130 J. Hájek & M. Brancucci Distribution: A species widely distributed in tropical and subtropical areas of the Old World. Four subspecies are currently recognised (Nilsson, 2001), occurrence of two of them is possible in the UAE: C. tripunctatus africanus Laporte de Castelnau, 1835, is distributed in continental Africa, southern Europe and it was recorded also from the Arabian Peninsula (Nilsson, 2009); C. tripunctatus lateralis occurs in continental Asia from Turkey to Japan, China and Indochina. However differences between subspecies are not well delimited, and assignment of single female is problematic. Cybister t. africanus is usually characterised by less oval body shape and black venter (Guignot, 1961: 914), but our specimen is rather elongated with fulvous venter; we therefore assign it tentatively to subspecies C. t. lateralis. New to the UAE. Cybister (Melanectes) vulneratus Klug, 1834 Plate 4 Specimens examined: Wadi Wurayah, pool, stream, 1 ex., 4.xii.2006, leg. J.-L. Gattolliat; 210 m, 1 ex., 5.x.2007, leg. J. Batelka & H. Pinda; 222 m, stream, 3 ex., 24.i.2010, leg. M.A. Jäch. Distribution: This is a widely distributed African species. In the Palaearctic Region, it occurs in northern Africa, Spain and Italy in Europe, and the Arabian Peninsula (Nilsson, 2009). New to the UAE. Tribe Eretini Crotch, 1873 Eretes sticticus (Linnaeus, 1767) Plate 5 Specimens examined: Al-Ajban, 1 ex., 5 12.vi.2006, LT, AvH. SSW of ad-dhaid, 1 ex., 29.xii i.2006, LT, AvH. Fujairah, 1 ex., 13.xi 10.xii.2005, LT, AvH; 1 ex., 28.ii 1.iv.2006, LT, AvH. Medinat Zayed, 2 ex., end vii.2005, LT, leg. B.J. Tigar (BMNH). Sharjah-Khor Kalba, near tunnel, 1 ex., 7 14.vi.2006, LT, AvH. Wadi Asimah, Al Ghail env., 314 m, 1 ex., 28.ix.2007, leg. J. Batelka & H. Pinda. Wadi Bih dam, 1 ex., 24.iv 1.v.2007, LT, AvH; 2 ex., 29.vi 8.vii.2008, LT, AvH. Wadi Hayl, 225 m, 1 ex., leg. J. Batelka & H. Pinda. Wadi Shawkah, m, 2 ex., 3.x.2007, leg. J. Batelka & H. Pinda; 1 ex., 25.x 15.xi.2007, WT, AvH. Published records: Walker & Pittaway (1987): UAE; Tigar & Osborne (1999): Abu Dhabi Emirate. Distribution: A cosmopolitan species occurring in the Old World from the Middle East throughout Africa north to Cyprus, including the Cape Verde and Canary Islands (Miller, 2002). Tribe Hydaticini Sharp, 1882 Hydaticus (Prodaticus) histrio Clark, 1864 Plate 6 Specimens examined: Fujairah, 2 ex., v.2006, LT, AvH. Hatta, 1 ex iv.2006, LT, AvH; 1 ex., 8 26.iv.2006, LT, AvH. Sharjah Desert Park, 1 ex., 22.ii 9.iii.2005, LT, AvH. Sharjah-Khor Kalba, near tunnel, 1 ex., 7 14.vi.2006, LT, AvH. Wadi Hayl, m, stream, 3 exs, 26.i.2010, leg. M.A. Jäch. Wadi Maidaq, 1 ex., 2 16.ii.2006, LT, AvH. Wadi Safad, 2 ex., 2 26.i.2006, WT, AvH; 1 ex., 21.ii 4.iii.2006, LT, AvH. Distribution: A species occurring from Iraq and the Arabian Peninsula to Iran, Kazakhstan, Afghanistan and Pakistan, and extending also to India in the Oriental Region (Nilsson, 2009). New to the UAE. Hydaticus (Prodaticus) pictus (Sharp, 1882) Plate 7 Specimens examined: Fujairah, 3 ex., v.2006, LT, AvH. Sharjah-Khor Kalba, near tunnel, 1 ex., v.2006, LT, AvH. Wadi Bih dam, 1 ex., 19.ii 29.iii.2007, LT, AvH. Wadi Maidaq, 1 ex., 2 16.ii.2006, LT, AvH. Wadi Safad, 4 ex., 2 26.i.2006, WT; 3 ex., 21.ii 4.iii.2006, LT; 1 ex., v.2006, LT; all AvH.

6 Order Coleoptera, family Dytiscidae 131 Plates : Copelatus antoniorum nov. spec. 1: Male (5.7 mm); 2: Female (5.8 mm); 3: Cybister (Cybister) tripunctatus lateralis (Fabricius) (28 mm); 4: Cybister (Melanectes) vulneratus Klug (26 mm).

7 132 J. Hájek & M. Brancucci Distribution: This species is widespread in the Middle East and is known from Syria, Iraq, the Arabian Peninsula, Iran, Pakistan and Russian Central Asia (Nilsson, 2009). New to the UAE. Hydaticus (Prodaticus) servillianus Aubé, 1838 Plate 8 Specimens examined: Al-Ajban, 1 ex., 26.ii 27.iii.2006, LT ; 3 ex., 6 22.v.2006, LT ; 1 ex., 5 12.vi.2006, LT ; all AvH. Ra s al-khaimah, Khuzam, 2 m, ground water pool, 6 ex., 25.i.2010, leg. M.A. Jäch & K. Mahmood. Wadi Safad, 1 ex., 20.xii i.2006, LT; 5 ex., 2 26.i.2006, WT ; 2 ex., 21.ii 4.iii.2006, LT ; 10 ex., iv.2006, LT ; 6 ex., v.2006, LT ; all AvH. Distribution: This species is widely distributed in the whole Afrotropical Region, mainly in central Africa and Madagascar (Guignot, 1961). In the Palaearctic Region, it extends to Yemen and Oman (Nilsson, 2009). New to the UAE. Subfamily Hydroporinae Aubé, 1836 Tribe Bidessini Sharp, 1882 Glareadessus stocki Wewalka & Biström, 1998 Plate 9 Specimens examined: Al-Ajban, 1 ex., x.2005, LT & MT, AvH. Bithnah, 3 ex., 31.xii ii.2006, LT, AvH. Fujairah, 2 ex., 13.xi 10.xii.2005, LT; 1 ex., 28.ii 1.iv.2006, LT; 1 ex., iv.2006, LT; 5 ex., v.2006, LT; all AvH. Hatta, 3 ex., 8 26.iv.2006, LT, AvH; 4 ex., viii.2006, LT, AvH; 3 ex., 30.xi.2006, J.-L. Gattolliat. Sharjah Desert Park, 3 ex., 18.i 25.ii.2006, LT; 1 ex., iii.2007, LT; 2 ex., 24.iii 1.iv.2007, LT; all AvH. Sharjah-Khor Kalba, near tunnel, 1 ex., 3 18.v.2006, LT; 18 ex., v.2006, LT; 1 ex., 31.v 7.vi.2006, LT; 3 ex., 7 14.vi.2006, LT; all AvH. Wadi Maidaq, 17 ex., 2 16.ii.2006, LT; 66 ex., 27.iv. 4.v.2006, LT; 1 ex., v.2006, LT; 7 ex., 1 8.vii.2006, LT; all AvH. Wadi Safad, 2 ex., 20.xii i.2006, LT; 1 ex., 2 26.i.2006, WT; 2 ex., 21.ii 4.iii.2006, LT; 28 ex., iv.2006, LT; 9 ex., v.2006, LT; 5 ex., vi.2006, LT; all AvH. Wadi Safad, in stream, 2 ex., 28.xi.2006, leg. J.-L. Gattolliat. Wadi Wurayah, in pool and stream, 1 ex., 4.xii.2006, leg. J.-L. Gattolliat. Wadi Wurayah farm, 1 ex., iii.2009, LT; 7 ex., 1 8.iv.2009, LT; 1 ex., iv.2009, LT; all AvH. Distribution: This species was described, and so far is only known, from Oman (Wewalka & Biström, 1998). New to the UAE. Hydroglyphus angularis (Klug, 1834) Plate 10 Specimens examined: Bithnah, 20 ex., 31.xii ii.2006, LT; 11 ex., 4 23.iii.2006, LT; 1 ex., vi.2006, LT; all AvH. SSW of ad-dhaid, 54 ex., xii.2005, LT; 1 ex., 29.xii i.2006, LT; all AvH. Fujairah, 3 ex., 13.xi 10.xii.2005, LT; 12 ex., 28.ii 1.iv.2006, 7 ex., LT; v.2006, LT; all AvH. Hatta, 1 ex., iii.2006, LT, AvH; 1 ex., 8 26.iv.2006, LT, AvH; 1 ex., viii.2006, LT, AvH; 3 ex., 30.xi.2006, leg. J.-L. Gattolliat. E of Jebel Hafeet, shallow pools in desert, 318 m, 2 exs, 27.i.2010, leg. M.A. Jäch. Near Mahafiz, 2 ex., 4 11.iv.2006, LT, AvH. Sharjah Desert Park, 2 ex., 20.x 8.xi.2005, LT; 1 ex., 18.i 25.ii.2006, LT; 2 ex., 17.ii 3.iii.2007, LT; 1 ex., iii.2007, LT; all AvH. Sharjah-Khor Kalba, near tunnel, 2 ex., 31.v 7.vi.2006, LT, AvH. Wadi Bih dam, 3 ex., 19.ii 29.iii.2007, LT, AvH. Wadi Maidaq, 7 ex., 27.xi 22.xii.2005, LT; 1 ex., 22.xii ii.2006, LT; 2 ex., 2 16.ii.2006, LT; 1 ex., 27.iv 4.v.2006, LT; all AvH. Wadi Safad, 5 ex., 20.xii i.2006, LT; 2 ex., 31.i 21.ii.2006, LT; 8 ex., iv.2006, LT; all AvH. Wadi Wurayah, 1 ex., iii.2007, MT, AvH. Wadi Wurayah farm, 3 ex., iii.2009, LT; 4 ex., 1 8.iv.2009, LT; 3 ex.,12 19.iv.2009, LT; all AvH. Distribution: This species is widely distributed in the entire northern half of Africa (Biström, 1986). In Asia it is known from Turkey, Iraq, Arabian Peninsula, Iran and Pakistan (Nilsson, 2009). New to the UAE.

8 Order Coleoptera, family Dytiscidae 133 Plates : Eretes sticticus (Linnaeus) (14 mm); 6: Hydaticus (Prodaticus) histrio Clark (13 mm); 7: Hydaticus (Prodaticus) pictus (Sharp) (15 mm); 8: Hydaticus (Prodaticus) servillianus Aubé (10.5 mm).

9 134 J. Hájek & M. Brancucci Hydroglyphus hormuzensis Hájek & Brancucci nov. spec. Plate 11, Figures 4 6 Specimens examined: Holotype (NMPC), labelled: UAE RAS AL KHAIMAH / Wadi Fara, env. Al Ghail / N E / 266 m a. s. l., 17.III.2007 / J. Batelka & H. Pinda leg. [printed] // HOLOTYPE / HYDROGLYPHUS / hormuzensis sp. nov. / J. Hájek & M. Brancucci det [red label, printed]. Paratypes: 24 26, same label data as holotype (BMNH, JBCP, NHMB, NMPC, UAEIC); 1 4, U.A.E ii.2006 / Wadi Maidaq (light trap) / 25.18N 56.07E / A. van Harten leg. ([loc. no.] 4996) [printed] (NHMB, NMPC); 1 1, U.A.E. 27.iv.-4.v.2006 / WADI MAIDAQ / 25.18N 56.07E (light trap) / A. van Harten leg. ([loc. no.] 4801) [printed] (NMPC); 3 4, U.A.E v.2006 / Wadi Maidaq (light trap) / 25.18N 56.07E / A. van Harten leg. ([loc. no.] 10359) [printed] (NHMB, NMPC); 2 2, U.A.E v.2006 / Wadi Maidaq (light trap) / 25.18N 56.07E / A. van Harten leg. ([loc. no.] 10573) [printed] (NHMB, NMPC); 10 8 U.A.E. 28.xi / WADI MAIDAQ / 25.18N 56.07E (pool) / J.-L. Gattoliat leg. ([loc. no.] 5753) [printed] (NHMB, NMPC); 1, U.A.E. 30.xi.2006 / WADI HATTA / J.-L. Gattoliat leg. ([loc. no.] 5773) [printed] (NMPC); 1, U.A.E. 20.x-24.xi.2007 / Sharjah Desert Park / 25.17N 55.42E (light trap) / A. van Harten leg. ([loc. no.] 8055) [printed] (NMPC); 1 1, U.A.E iv.2009 / Wadi Wurayah farm / (light trap) / A. van Harten leg. ([loc. no.] 10990) [printed] (NHMB, NMPC). 5 exs, UAE: Ras al-khaimah / (south), Wadi Shawkah / Hajar Mountains (UAE 3) / ca. 80 km ESE Dubai / 23.I.[20]10, leg. M.A. Jäch // upper course / residual pools / ca. 318 m a.s.l. / 25 06'06.1''N / 56 03'26.4''E [printed] (NHMW, NMPC). 1, U.A.E. 22.ii.2010 / Wadi Shawkah / (stream) / K. Mahmood leg. ([loc. no.] 11590) [printed] (NHMB). 1, OMAN, Batinah Prov. / WADI SAHTAN ca 600 m a.s.l. / Umq vill. env., puddle / 23 20'14''N; 57 18'55''E (GPS) / 19.x.2009 A. REITER lgt. [printed] (NMPC). 1 1, 3 Oman J. Al-Akhdar / rd. Tanuf-Hat, residual pools in wadi / N E m / Ribera, Cieslak & Hernando leg. [printed] (CSIC). 1 4, IRAN IV.2000 / Hormozgan Prov., 350 m / 10 km E DEHBAREZ / (27 27 N, E) // Iran 2000 Czech Biological / Expedition / J. HÁJEK & M. MIKÁT leg. (NMPC). Each paratype has a red label similar to that of the holotype, except the word PARATYPE is used instead of the word HOLOTYPE, and the respective sex symbol. Description: Body oblong oval. Pronotum nearly rectangular. Sides of pronotum almost straight, anteriorly slightly curved inwards. Pronotum distinctly narrower than elytra; angle between pronotum and elytra fairly distinct. Pronotum, elytra and ventral surface covered with recumbent setae. Measurements: Body length mm (holotype 2.1), width mm (holotype 1.0). Colouration. Body colouring almost uniformly brownish-black; basal antennomeres, mouth appendages, anterior corners of pronotum, tibiae and tarsi usually indistinctly paler. Surface sculpture. Head finely microsculptured; punctation fine, rather sparse, posteriorly lacking behind eyes; anterior margin of head rounded; frontolateral depressions shallow. Pronotum submatt, finely microsculptured, with fine, almost regularly distributed setigerous punctures; striae fairly strongly impressed. Elytra submatt, finely miscrosculptured; punctation similar to that of pronotum; basal striae well developed, slightly shorter than striae on pronotum; sutural line distinct from close to base to apex. Epipleura finely punctate. Ventral surface finely microsculptured, microsculpture on metaventrite and abdominal ventrites composed of distinctly transverse meshes; punctation composed of fine, sparse, irregularly distributed punctures. Metacoxal lines almost straight, anteriorly slightly divergent. Male. Pro- and mesotarsi slightly broadened. Median lobe in ventral view slender, parallel; apex pointed (Fig. 4). Median lobe in lateral view nearly regularly inflexed; apex with short upward bent hair-like projection (Fig. 5). Parameres (lateral lobes) seemingly only twosegmented (Fig. 6). Female. Similar to male in habitus. Pro- and mesotarsi narrow. Differential diagnosis: The uniform dark body colouration of this new species is similar to

10 Order Coleoptera, family Dytiscidae 135 Figures 4 6 Hydroglyphus hormuzensis nov. spec. 4: Median lobe in lateral view; 5: Same in ventral view; 6: Lateral lobe (paramere). Scale bar: 0.1 mm. that of H. strigicollis (Fairmaire, 1880) from Reunion. However, the new species differs from that taxon in its shorter body length, broader and flat habitus, and differences in the shape of the male genitalia (see Biström, 1986: Fig. 19). The male genitalia of Hydroglyphus hormuzensis nov. spec. are very similar to that of the widespread African H. zanzibarensis (Régimbart, 1906). It differs from that species in having well developed basal elytral striae, a more slender apex of the male median lobe in ventral view, the apex of the median lobe with a hair-like projection, and by the unmodified female apical abdominal ventrite. Habitats and methods of collection: The new species was collected in small pools in wadis, and at light. Etymology: The specific epithet refers to the area of the Strait of Hormuz, where the new species was collected. Distribution: The species is so far only known from several localities on both the Arabian (Oman, UAE) and the Iranian side of the Strait of Hormuz. Hydroglyphus sinuspersicus Hájek & Wewalka, 2009 Plate 12 Specimens examined: Hatta, 1 ex., 30.xi.2006, leg. J.-L. Gattoliat. E of Jebel Hafeet, shallow pools in desert, 318 m, 2 ex., 27.i.2010, leg. M.A. Jäch. Near Mahafiz, 1 ex., 4 11.iv.2006, LT, AvH. Sharjah- Khor Kalba, near tunnel, 1 ex., v.2006, LT, AvH. Wadi Bih dam, 1 ex., 24.iv 1.v.2007, LT, AvH. Wadi Fara, Al-Ghail env., 266 m, 21 ex., 17.iii.2007, leg. J. Batelka & H. Pinda. Wadi Maidaq, 2 ex., 27.xi 22.xii.2005, LT, AvH; 1 ex., 27.iv 4.v.2006, LT, AvH; pool, 6 ex., 28.xi. 2006, leg. J. L. Gattoliat. Wadi Shawkah, residual pools, 318 m, 1 ex.; 23.i.2010, leg. M.A. Jäch. Wadi Tarabat, springfed pools, 450 m, 24 ex., 27.i.2010, leg. M.A. Jäch. Distribution: A species described recently from the area of the Persian Gulf. It was previously misidentified as Hydroglyphus major (Sharp, 1882) (cf. Sharp, 1882; Biström, 1986).

11 136 J. Hájek & M. Brancucci Plates : Glareadessus stocki Wewalka & Biström (1.9 mm); 10: Hydroglyphus angularis (Klug) (2.8 mm); 11: Hydroglyphus hormuzensis nov. spec. (2.1 mm); 12: Hydroglyphus signatellus (Klug) (2.0 mm); 13: Hydroglyphus sinuspersicus Hájek & Wewalka (3.1 mm).

12 Order Coleoptera, family Dytiscidae 137 Hydroglyphus sinuspersicus is known from several localities in the UAE, northern Oman, and south-western Iran (Hájek & Wewalka, 2009). Hydroglyphus signatellus (Klug, 1834) Plate 13 Specimens examined: Al-Ajban, 2 ex, x.2005, LT & MT; 13 ex., 9.xi 7.xii.2005, LT & MT; 6 ex., 28.xii i.2006, LT; 10 ex., 26.ii 27.iii.2006, LT; 30 ex., 6 22.v.2006, LT; 36 ex., 5 12.vi.2006, LT; 18 ex., vi.2006, LT; all AvH. Bithnah, 8 ex., 31.xii ii.2006, LT, AvH. SSW of ad-dhaid, 32 ex., xii.2005, LT; 2 ex., 29.xii i.2006, LT; 27 ex., v.2006, LT; all AvH. Fujairah, 13 ex., 24.ii 5.iii.2005, LT; 49 ex., 13.xi 10.xii.2005, LT; 9 ex., 28.ii 1.iv.2006, LT; 3 ex., iv.2006, LT; 284 ex., v.2006, LT; all AvH. Fujairah, in tank at farm, 7 ex., 28.xi.2006, leg. J.-L. Gattolliat. Hatta, 1 ex., i.2006, LT; 7 ex., 4 11.iv.2006, LT; 18 ex., 8 26.iv.2006, LT; 31 ex., v.2006, LT; 1 ex., viii.2006, LT; all AvH. Jebel Hafit, Green Mubazarat, thermal spring, 25 ex., 5.xii.2006, leg J.-L. Gattolliat; 39 ex., 27.i.2010, leg. M.A. Jäch & K. Mahmood. E of Jebel Hafeet, shallow pools in desert, 318 m, 1 ex., 27.i.2010, leg. M.A. Jäch & K. Mahmood. Khatham, 1 ex., end vii.1995, LT, leg. B.J. Tigar (BMNH). Khor al-khwair, 3 ex., iv.2007, LT; 2 ex., 24.iv 1.v.2007, LT; 1 ex., 2 13.v.2007, LT; all AvH. Near Mahafiz, 4 ex., iii.2006, LT; 1 ex., 4 11.iv.2006, LT; 1 ex., iv.2006, LT; 5 ex., viii.2006, LT; all AvH. Ra s al-khaimah, Khuzam, 2 m, ground water pool, 28 ex., 25.i.2010, leg. M.A. Jäch & K. Mahmood. Sharjah Desert Park, 6 ex., 22.ii 9.iii.2005, LT; 10 ex iii.2005, LT; 41 ex., 20.x 8.xi.2005, LT; 1 ex., 13.xi 11.xii.2005, LT; 9 ex., 18.i 25.ii.2006, LT; 8 ex., 25.ii 25.iii.2006, LT; 2 ex., 21.xii i.2007, LT; 2 ex., 17.ii 3.iii.2007, LT; 1 ex., 3 10.iii.2007, LT; 1 ex., iii.2007, LT; 12 ex., 8 15.iv.2007, LT; 1 ex., iv.2007, LT; 6 ex., 20.x 24.xi.2007, LT; 5 ex., 25.v 15.vii.2008, LT; 2 ex., 30.i 3.iii.2009, LT; all AvH. Sharjah-Khor Kalba, near tunnel, 34 ex., v.2006, LT; 6 ex., 31.v 7.vi.2006, LT; 5 ex., 7 14.vi.2006, LT; all AvH. NARC, near Sweihan, 4 ex., 16.xi 21.xii.2005, LT, AvH. Wadi Bih dam, 53 ex., iii.2007, LT; 7 ex., 24.iv 1.v.2007, LT; 2 ex., 30.v 5.vi.2007, LT; 1 ex., 29.vi 8.vii.2008, LT; all AvH. Wadi Maidaq, 9 ex., 27.xi 22.xii.2005, LT; 3 ex., 22.xii ii.2006, LT; 83 ex., 2 16.ii.2006, LT; 27 ex., 27.iv 4.v.2006, LT; 122 ex., 1 8.vii.2006, LT; all AvH. Wadi Maidaq, residual pools, 386 m, 24 ex., 26.i.2010, leg. M.A. Jäch & K. Mahmood. Wadi Fara, al-ghail env., 266 m, 1 ex., 28.ix.2007, leg. J. Batelka & H. Pinda. Wadi Safad, 7 ex., 20.xii i.2006, LT; 21 ex., 2 26.i.2006, WT; 26 ex., 31.i 21.ii.2006, LT; 7 ex., iv.2006, LT; 5 ex., v.2006, LT; 17 ex., vi.2006, LT; 3 ex., 1 8.vii.2006, LT; all AvH. Wadi Safad, in stream, 1 ex., 28.xi.2006, leg. J.-L. Gattolliat. Wadi Shawkah, in pool, 10 ex., xi.2006, leg. J.-L. Gattolliat; in stream and residual pools, 318 m, 18 ex., 23.i.2010, leg. M.A. Jäch & K. Mahmood. Wadi Siji, 6 ex., 24.ix 12.x.2006, WT, AvH. Wadi Wurayah, 6 ex., iii.2007, MT, AvH; in pool and stream, 2 ex., 4.xii.2006, leg. J.-L. Gattolliat. Wadi Wurayah farm, 1 ex., 8 15.iii.2009, LT; 5 ex., iii.2009, LT; 75 ex., 1 8.iv.2009, LT; all AvH. Distribution: This is a widely distributed species. In northern Africa it occurs from Senegal and Morocco to Egypt, Sudan, Ethiopia and Kenya (Biström, 1986); in Europe from the whole Mediterranean area, and in Asia east to Kyrgyzstan and Pakistan (Nilsson, 2009). New to the UAE. Tribe Hydroporini Aubé, 1836 Nebrioporus mascatensis (Régimbart, 1897) Plate 14 Specimens examined: Fujairah, 1 ex., v.2006, LT, AvH. Hatta, 1 ex., 30.xi.2006, leg. J.-L. Gattolliat. Wadi Maidaq, pool, 13 ex., 28.xi.2006, leg. J.-L. Gattolliat. Wadi Shawkah, residual pools, 318 m, 5 ex., 23.i.2010, leg. M.A. Jäch. Wadi Wurayah, 3 ex., 26.xi.2006 ; in pool and stream, 1 ex., 4.xii.2006 ; all leg. J. L. Gattolliat. Distribution: This species was originally described from Oman, and subsequently recorded also from Iran and Afghanistan (Nilsson, 2009). New to the UAE.

13 138 J. Hájek & M. Brancucci Plates : Nebrioporus mascatensis (Régimbart) (5.1 mm); 15: Herophydrus musicus (Klug) (3.6 mm); 16: Hygrotus (Coelambus) confluens (Fabricius) (3.4 mm); 17: Hygrotus (Coelambus) inscriptus (Sharp) (4.1 mm).

14 Order Coleoptera, family Dytiscidae 139 Tribe Hygrotini Portevin, 1929 Herophydrus musicus (Klug, 1834) Plate 15 Specimens examined: Wadi Wurayah farm, 1 ex., iii.2009, LT, AvH. Distribution: This is a widely distributed Palaearctic species. It occurs in the whole Mediterranean area and subtropical parts of Asia eastward to western China and India (Nilsson, 2009). New to the UAE. Hygrotus (Coelambus) confluens (Fabricius, 1787) Plate 16 Specimens examined: Khor al-khwair, 1 ex., 2 13.v.2007, LT, AvH. Distribution: A Palaearctic species distributed in the whole of Europe (except the most northern parts), northern Africa, and Asia eastward to Afghanistan and Kashmir (Nilsson, 2009). New to the UAE. Hygrotus (Coelambus) inscriptus (Sharp, 1882) Plate 17 Specimens examined: Al Ajban, 1 ex., x.2005, LT & MT; 4 ex., 9.xi 7.xii.2005, LT & MT; 3 ex., 28.xii i.2006, LT; 42 ex., 26.ii 27.iii.2006, LT; 2 ex., 2 9.iv.2006, LT; 45 ex., 6 22.v.2006, LT; 35 ex., 5 12.vi.2006, LT; 13 ex., vi.2006, LT; all AvH. Dubai, Jebel Ali-Dubai city, salt water pools, 4 m, 2 ex., 28.i.2010, leg. K. Mahmood. Fujairah, 1 ex., 1 8.iv.2006, LT, AvH. NARC, near Sweihan, 1 ex., 16.xi 21.xii.2005, LT; 4 ex., 26.ii 2.iv.2006, LT; all AvH. Wadi Bih dam, 1 ex., 19.ii 29.iii.2007, LT, AvH. Wadi Safad, 1 ex., 27.xi 22.xii.2005, LT, AvH. Wadi Wurayah, 8 ex., iii.2007, MT, AvH. Distribution: This species is known from Egypt, Saudi Arabia, Syria, Iraq, Kuwait, Iran, and Turkmenistan and Uzbekistan in Central Asia (Nilsson, 2009). New to the UAE. Tribe Hyphydrini Sharp, 1882 Hyphydrus pictus Klug, 1834 Plate 18 Specimens examined: Hatta, 1 ex., i.2006, LT, AvH. Wadi Tarabat, Jebel Hafeet, springfed pools, 450 m, 2 ex., 27.i.2010, leg. M.A. Jäch. Distribution: This species is known from Ethiopia and Egypt in north-eastern Africa, the Arabian Peninsula and Iran in Asia (Biström, 1982). New to the UAE. Subfamily Laccophilinae Gistel, 1856 Tribe Laccophilini Gistel, 1856 Laccophilus maindroni maindroni Régimbart, 1897 Plate 19 Specimens examined: Al-Hayl, 2 ex., 3.xii.2006, leg. J.-L. Gattolliat. Sharjah Desert Park, 2 ex., 29.xi.2006, leg. J. L. Gattolliat. Sharjah-Khor Kalba, near tunnel, 1 ex., 7 14.vi.2006, LT, AvH. Wadi Fara, al-ghail env., 266 m, 1 ex., 17.iii.2007; 22 ex., 28.ix.2007; all leg. J. Batelka & H. Pinda. Wadi Maidaq, pool, 1 ex., 28.xi.2006, leg. J.-L. Gattolliat; residual pools, 386 m, 13 ex., 26.i.2010, leg. M.A. Jäch. Wadi Safad, 1 ex., 21.ii 4.iii.2006, LT, AvH. Wadi Shawkah, residual pools, 318 m, 17 ex., 23.i.2010, leg. M.A. Jäch. Wadi Tarabat, Jebel Hafeet, springfed pools, 450 m, 27.i.2010, 2 ex., leg. M.A. Jäch. Wadi Wurayah, in pool and stream, 3 ex., 4.xii.2006, leg. J.-L. Gattolliat; in stream, 222 m, 2 ex., 24.i.2010, leg. M.A. Jäch. Wadi Wurayah farm, 1 ex., 1 8.iv.2009, LT, AvH. Distribution: The nominotypical subspecies was described and is so far known only from Oman. L. maindroni persicus Brancucci, 1983, was described from the Iranian province of Hormozgan, and subsequently recorded also from Baluchistan province in Pakistan (Hájek, 2006). New to the UAE.

15 140 J. Hájek & M. Brancucci Plates : Hyphydrus pictus Klug (4.5 mm); 19: Laccophilus maindroni Régimbart (4.5 mm). ACKNOWLEDGEMENTS We are indebted to Antonius van Harten (Sharjah, United Arab Emirates) for the opportunity to join the UAE Insect Project. We are also obliged to all colleagues mentioned in the material section for the opportunity to study their specimens. The study was partly supported by the Ministry of Culture of the Czech Republic (grant MK ). REFERENCES Abdu, R.M. & N.F. Shaumar (1985): A preliminary list of the insect fauna of Qatar. Qatar University Science Bulletin, 5: Balfour-Browne, J. (1951): Coleoptera: Haliplidae, Dytiscidae, Gyrinidae, Hydraenidae, Hydrophilidae. Expedition to South West Arabia, 1(16): pls. 10, 11. Balke, M. (2005): 7.6. Dytiscidae Leach, Pp in: R.G. Beutel & R.A.B. Leschen (eds.): Handbook of zoology. A natural history of the phyla of the animal kingdom. Volume IV. Arthropoda: Insecta. Part 38. Coleoptera, Beetles. Volume 1: Morphology and systematics (Archostemata, Adephaga, Myxophaga, Polyphaga partim.). Walter de Gruyter, Berlin, New York, xi pp. Biström, O. (1982): A revision of the genus Hyphydrus Illiger (Coleoptera, Dytiscidae). Acta Zoologica Fennica, 165:

16 Order Coleoptera, family Dytiscidae 141 Plates Wadi Bani Awf (Oman), the type locality of Copelatus antoniorum nov. spec. (Photographs by A. Reiter)

17 142 J. Hájek & M. Brancucci Biström, O. (1986): Review of the genus Hydroglyphus Motschulsky (= Guignotus Houlbert) in Africa (Coleoptera, Dytiscidae). Acta Zoologica Fennica, 182: Brancucci, M. (1979): Insects of Saudi Arabia. Coleoptera: Fam Haliplidae, Dytiscidae, Gyrinidae. Fauna of Saudi Arabia, 1: Brancucci, M. (1980): Insects of Saudi Arabia. Coleoptera: Fam. Haliplidae, Dytiscidae, Gyrinidae. Part 2. Fauna of Saudi Arabia, 2: Brancucci, M. (1981): Insects of Saudi Arabia. Coleoptera: Fam. Dytiscidae (Part 3). Fauna of Saudi Arabia, 3: Brancucci, M. (1985): Insects of Saudi Arabia. Coleoptera: Fam. Haliplidae, Noteridae, Dytiscidae, Gyrinidae (Part 4). Fauna of Saudi Arabia, 6: Gahan, C.J. (1895): On the Coleoptera obtained by Dr. Andersons collector during Mr. T. Bent s expedition to the Hadramaut, South Arabia. Journal of the Linnean Society of London, Zoology, 25: Guignot, F. (1951): Hydaticus nouveaux de la collection Régimbart. Revue Française d Entomologie, 18: Guignot F. (1961): Revision des hydrocanthares d Afrique (Coleoptera Dytiscoidea), troisième partie. Annales du Musée Royal du Congo Belge, Série 8vo (Sciences Zoologiques), 90: Hájek, J. (2006): The westernmost record of Oriental Neptosternus circumductus, and the review of Dytiscidae (Coleoptera) of Baluchistan (Iran, Pakistan). Acta Entomologica Musei Nationalis Pragae, 46: Hájek, J. & G. Wewalka (2009): New and little known species of Hydroglyphus (Coleoptera: Dytiscidae) from Arabia and adjacent areas. Acta Entomologica Musei Nationalis Pragae, 49: Harten, A. van (2005): The insects of the United Arab Emirates. A check list of published records. Dar Al Ummah Printing, Publishing, Distribution & Advertising, Abu Dhabi, 88 pp. Klug, J.C.F. (1834): Symbolae physicae seu icones et descriptiones insectorum quae ex itinere per Africam borealem et Asiam occidentalem Friderici Guilelmi Hemprich et Christiani Godofredi Ehrenberg. Decas quarta. Officina Academica, Berolini, 42 pp. Miller, K.B. (2002): Revision of the genus Eretes Laporte, 1833 (Coleoptera: Dytiscidae). Aquatic Insects, 24: Miller, K.B., J. Bergsten & M.F. Whiting (2009): Phylogeny and classification of the tribe Hydaticini (Coleoptera: Dytiscinae): partition choice for Bayesian analysis with multiple nuclear and mitochondrial protein coding genes. Zoologica Scripta, 38: Nilsson, A.N. (2001): Dytiscidae (Coleoptera). World Catalogue of Insects, 3: Nilsson, A.N. (2009): Catalogue of Palearctic Dytiscidae (Coleoptera). Update distributed as a PDF file via Internet; version 31.XII Available from: Pederzani, F. (2003): Hydaticus satoi dhofarensis n. ssp. from Oman (Insecta Coleoptera Dytiscidae). Quaderno di Studi e Notizie di Storia Naturale della Romagna, 17 (Supplementum): Régimbart, M. (1897): Dytiscides recueillis à Mascate par M. Maurice Maindron. Bulletin de la Société Entomologique de France, 1897: Rocchi, S. (1985): Insects of the Yemen Arab Republic. Coleoptera: Fam. Haliplidae, Dytiscidae, Gyrinidae. Fauna of Saudi Arabia, 6: Sharp, D. (1882): On aquatic carnivorous Coleoptera or Dytiscidae. Scientific Transactions of the Royal Dublin Society, (2) 2:

18 Order Coleoptera, family Dytiscidae 143 Shaverdo, H., M.T. Monaghan, D. Lees, R. Ranaivosolo & M. Balke (2008): A new genus of Malagasy endemic diving beetles and description of a highly unusual species based on morphology and DNA sequence data (Dytiscidae: Copelatinae). Systematics and Biodiversity, 6: Tigar, B.J. & P.E. Osborne (1999): Patterns of biomass and diversity of aerial insects in Abu Dhabi s sandy deserts. Journal of Arid Environment, 43: Walker, F. (1871): List of Coleoptera collected by J. K. Lord esq. in Egypt, Arabia and near the African shore of the Red Sea. With characters of the undescribed species. E.W. Janson, London, 19 pp. Walker, D.H. & A.R. Pittaway (1987): Insects of Eastern Arabia. MacMillan, London, xvi pp. Wewalka, G. (1974): Systematische und faunistische Bemerkungen zu einigen paläarktischen Dytisciden. Koleopterologische Rundschau, 51: Wewalka, G. (1992): Revisional notes on Palearctic species of the Hydroporus planus group (Coleoptera: Dytiscidae). Koleopterologische Rundschau, 62: Wewalka, G. (2004): Dytiscidae (Insecta: Coleoptera) of the Socotra Archipelago, with descriptions of two new species. Fauna of Arabia, 20: Wewalka, G. & O. Biström (1998): Glareadessus gen.n. with description of two new species from the Persian Gulf region (Coleoptera: Dytiscidae). Koleopterologische Rundschau, 68: Authors addresses: J. Hájek, Department of Entomology, National Museum, Kunratice 1, CZ Praha 4, Czech Republic; jiri_hajek@nm.cz M. Brancucci, Natural History Museum, Entomology, Augustinergasse 2, CH-4001 Basel, Switzerland; Department of Environmental Sciences, Section Biogeography, University of Basel, St. Johanns-Vorstadt 10, CH-4056 Basel, Switzerland; michel.brancucci@unibas.ch