Leiodytes migrator ( Sharp, 1882 ) Hendrich & Wang & Balke, 2021

Hendrich, Lars, Wang, Liang-Jong & Balke, Michael, 2021, Taxonomic revision of Australasian diving beetles in the genus Leiodytes Guignot 1936 (Coleoptera: Dytiscidae, Bidessini), Zootaxa 4990 (1), pp. 23-44 : 26-29

Leiodytes migrator ( Sharp, 1882) comb. nov.

( Figs 1A, B , 2A , 3A , 4A–C, F , 5 , 8 , 10 , 11 , 12 , 13 )

Bidessus migrator Sharp, 1882: 345 (orig. descr.); Zimmermann 1920: 47 (cat.).

Clypeodytes migrator ( Sharp, 1882) : Watts 1978: 34 (designation of lectotype); Watts 1985 (cat.): 24; Lawrence et al. 1987: 335 (check list, cat.); Biström 1988: 30 (check list); Larson 1993: 51 (ecol., faun.); Larson 1997: 272 (ecol., faun.); Hendrich 1999: 65 (ecol., faun.); Hendrich 2008 (ecol., faun.): 317; Nilsson & Hájek 2021: 108 (cat.).

Leiodytes migrator ( Sharp, 1882) : Hendrich et al. 2019: 49 (cat., tax.). Note: At that time, transfer to Leiodytes not available, disclaimer given.

Bidessus loriae Régimbart, 1892: 989 (orig. descr.) syn. n.

Clypeodytes loriae ( Régimbart, 1892) : Régimbart 1899: 218 (comb. nov).

Type locality. Australia, Queensland, Brisbane.

Type material of Bidessus migrator . Lectotype, female: “ Lectotype ” [printed label with violet margin], “Type” [printed label with red margin], “ Australia Brisbane” [handwritten label by Sharp ], “Sharp Coll 1905-313” [printed label], “ Bidessus migrator n.sp. ” [handwritten label by Sharp], “ Bidessus migrator Sharp Det. C. Watts 1978 ” [handwritten label by Watts] ( BHMN).

Paralectotypes (5 specimens): 1 female, “Cotype” [printed label with yellow margin], “Sharp Coll 1905-313” [printed label], “99. Australia Brisbane” [handwritten label by Sharp ], “ Clypeodytes migrator Shp D.S. ” [handwritten label by Watts], “ Syntype ” [printed label with blue margin], “ Bidessus migrator Shp. Det. C. Watts 1978 ” [handwritten label by Watts] ( BHMN) ; 1 female, “Cotype” [printed label with yellow margin], “Sharp Coll 1905- 313” [printed label], “Type 99. Australia ” [handwritten label by Sharp ], “ Clypeodytes migrator Shp D.S. ” [handwritten label by Watts], “ Syntype ” [printed label with blue margin], “ Bidessus migrator Shp. Det. C. Watts 1978 ” [handwritten label by Watts] ( BHMN) ; 2 males, “ Sharp Coll 1905-313” [printed label], “ Cotype ” [printed label with yellow margin], “ Clypeodytes migrator Shp D.S. ” [handwritten label by Watts], “ Syntype ” [printed label with blue margin] ( BHMN) ; 1 female, “ Sharp Coll 1905-313” [printed label], “ Syntype ” [printed label with blue margin], “ Clypeodytes migrator Shp D.S. ” [handwritten label by Watts], ( BHMN) .

Type material of Bidessus loriae : Lectotype (by present designation), male: “N. GUINEA MER. RIGO, Luglio 1889, L. LORIA” [printed white label with black margin], “Museum Paris Coll Maurice Régimbart 1908” [printed white label], “ Loriae Rég” [handwritten white label], “TYPE” [printed red label], “ Leiodytes migrator (Sharp) det. L. J. Wang 2002” [printed white label], “ LECTOTYPE Bidessus loriae Régimbart, 1892 Hendrich, Wang & Balke des. 2021” [printed red label], “ Leiodytes migrator ( Sharp, 1882) Hendrich, Wang & Balke det. 2021” [white printed label] ( MNHN).

Paralectotype: Male, “N. GUINEA MER. RIGO, Luglio 1889, L. LORIA” [printed white label with black margin], “Museum Paris Coll Maurice Régimbart 1908” [printed white label], “TYPE” [printed red label], “ Leiodytes migrator (Sharp) det. L. J. Wang 2002” [printed white label], “ PARALECTOTYPE Bidessus loriae Régimbart, 1892 Hendrich, Wang & Balke des. 2021” [printed red label], “ Leiodytes migrator ( Sharp, 1882) Hendrich, Wang & Balke det. 2021” [white printed label] ( MNHN).

Notes : 2 exs., “Clarence River, NSW, Lea” [mounted on separate cards on same pin] ( AM). These two specimens bear type labels which appear to have been attached by Guignot in 1955 who added a label “ Clypeodytes (s. str.) clarenticus n. sp. Holotype et paratype ”. This is a manuscript name that Guignot never published. The specimens also bear a determination label added by C.H.S. Watts in 1981 identifying them as C. migrator .

Additional material studied (1,054 specimens). Australia, Northern Territory. 46 exs., “ Australia: NT, Manton Dam Recr. Area, 46 km S Darwin, 35m, 19.VIII.2006, 12.50.270S 131.08.050E, L. & E. Hendrich leg. (NT 1)” ( CLH, ZSM); 2 exs., “ Australia: NT, Litchfield NP, Shady Creek, Florence Falls, 92m, 20.VIII.2006, 13.06.116S 130.47.195E, L. & E. Hendrich leg. (NT 3)” ( ZSM); 21 exs., “ Australia: NT, Anniversary Creek, 12 km S Adelaide River Scenic Route, 43m, 22.VIII.2006, 13.19.252S 131.08.271E, L. & E. Hendrich leg. (NT 7)” ( CLH, ZSM); 57 exs., “ Australia: NT, Kakadu NP, Old Jim Jim Road, Barramundi Creek, 50m, 26.VIII.2006, 12.59.652S 132.22.928E, L. & E. Hendrich leg. (NT 19)”, one specimen with “MB1680” [green printed label] ( CLH, ZSM); 3 exs., “ Australia: NT, Magela Creek downstream, Jabiru East, 31m, 30.VIII.2006, 12.38.312S 132.53.441E, L. & E. Hendrich leg. (NT 23)” ( ZSM, CLH); 8 exs., “ Australia NT, Kakadu N.P., Nourlangie District, Gubara, 50 m, 25.X.1996, S12°50.101´E132°52.501´, Hendrich leg. (loc. 1)” ( CLH); 1 ex., “ Australia NT, Kakadu N.P., Jim Jim District, Jim Jim Falls Camping Area, Jim Jim Creek, 60 m, 26. & 27.X.1996, S13°16.218´E132°49.276´, Hendrich leg. (loc. 2b)” ( CLH); 170 exs., “ Australia NT, Kakadu N.P., East Alligator District, Ubirr Rock Camping Area, 30 m, 27.& 28. X.1996, S12°26.506´E132°57.304´, Hendrich leg. (loc. 4)” ( CLH); 4 exs., “ Australia NT, Kakadu N.P., Nourlangie District, Arnhem Highway, 12 km WNW Jabiru, 50 m, 29.X.1996, S12°37.937´E132°38. 134´, Hendrich leg. Loc. 5” ( CLH); 2 exs., “ Australia NT, Kakadu N.P., Mary River District, Old Darwin Road, Black Jungle Spring, 30 m, 30.X.1996, S13°02.908´E132°09.715´, Hendrich leg. Loc. 7” ( CLH); 12 exs., “ Australia NT, Kakadu N.P., Jim Jim District, Old Darwin Road, Barramundi Creek, 30 m, 30.X.1996, S12°59.652´E132°22.928´, Hendrich leg. Loc. 8” ( CLH); 4 exs., “ Australia NT, Kakadu N.P., Jim Jim District, Barramundie Gorge, Maguk, 50 m, 31.X.1996, S 13°18.823´E132°26.198´, Hendrich leg. Loc. 9” ( CLH); 5 exs., “ Australia NT, Kakadu N.P., Jim Jim District, Barramundie Gorge, Maguk, 50 m, 31.X.1996, S 13°18.823´E 132°26. 198´, Hendrich leg. Loc. 10” ( CLH); 103 exs., “ Australia NT, Kakadu N.P., Jim Jim District, Gungurul Lookout, 50 m, 1.XI.1996, S13°59.359´E132°19.904´, Hendrich leg. Loc. 11” ( CLH, CDB); 2 exs., “ Australia NT, Old Stuart Hwy Scenic Drive, Robin Falls, Creek, 50 m, 7.VII.1999 Hendrich leg. Loc. 37/137” ( CLH); 2 exs., “ Australia NT, Old Stuart Hwy, Scenic Drive, Anniversary Creek south of Adelaide River, 50 m, 8.7.1999, Hendrich leg. Loc. 38/138” ( CLH); 2 exs., “ Australia NT, 6 km SE Mt. Borradaile station, 8.X.1998, C.H.S. Watts leg.” ( SAMA); 5 exs., “ Australia NT, Kakadu N.P., Sth. Johnston river creek, Old Jim Jim Road, 10.X.1998, C.H.S. Watts leg.” ( SAMA); 4 exs., “ Australia NT, Kakadu N.P., Barramundi Creek, 18.III.1998, C.H.S. Watts leg.” ( SAMA); 4 exs., “ Australia NT, Kakadu N.P., VI.1988, C.G. Watts leg.” ( SAMA); 1 ex., “ Australia NT, Kakadu N.P., Jabiru, 22.III.1998, C.H.S. Watts leg.” ( SAMA); 2 exs., “ Australia NT, Kakadu N.P., 10 km SW Jabiru, 22.III.1998, C.H.S. Watts leg.” ( SAMA); 2 exs., “ Australia NT, Kakadu N.P., 12 km NE Jabiru, 19.III.1998, C.H.S. Watts leg.” ( SAMA); 1 ex., “ Australia NT, Australia NT, 2 km S Adelaide River, 1.II.1999, C.H.S. Watts leg.” ( SAMA); 16 exs., “ Australia NT, Manton Dam, 2.II./ 23.III.1998, C.H.S. Watts leg.” ( SAMA). Queensland. 2 males und 2 females, “Australien, QL (26) 10 km S Tully S Innisfajl [Innisfail], 30 m 25.1.1993 leg. Wewalka” [printed], “ Clypeodytes migrator (Sharp) det. Wewalka [19]94” ( CHF); 1 ex., “N QLD, south of Cook, 3 km WNW Captain Billy Landing, -11.61667 142.8333, 3/04/1993, Zborowski, P. leg.” ( ANIC); 5 exs., “N QLD, south of Napranum, Wheeler Creek, 11/09/1993, at light, Zborowski, P. & Shattuck, S.O. leg.” ( ANIC); 1 ex., “N QLD, south of Cook, Batavia Downs, 1993-03-03 / 1993-03-10, at light, Cunningham, I.C. leg.” ( ANIC); 4 exs., “N QLD, south of Cook, Irone Range, 10/05/1971, Brooks, J.G” ( ANIC); 1 ex., “N QLD, Archer River, 26/10/1993, at light, Zborowski, P. & Rentz, D.C.F. leg.” ( ANIC); 1 ex., “N QLD, south of Cook, Silver Plains, Cape York Pen., 1/04/1965, Wassell, J.L. leg.” ( ANIC); 2 exs., “N QLD, south of Cook, Marina Plains , via Musgrave, 17/11/1982, Storey, Brown & Jacobson leg.” ( ANIC); 2 exs., “N QLD, south of Cook, Endeavour River, 19/01/1994, at light, Zborowski, P. & Edwards, E.D” ( ANIC); 1 ex., “N QLD, south of Cook, Hann River, 14/01/1994, Zborowski, P. & Edwards, E.D. leg.” ( ANIC); 1 ex., “N. QLD Tolga 22.X.85 J.D. Brown light trap” ( CLH); 1 ex., “ Australia n. Qld. 15 km WNW of South Johnstone, light trap, 1.XI.1985 Fay & Halfpapp” ( CLH); 1 ex., “ 12 km S Normanton, VI.1988, C.G. Watts leg.” ( SAMA); 2 exs., “ 20 km N Townsville, Bushland Beach, 30.III.1998, A.J. Watts leg.” ( SAMA); 1 ex., “Greenvale, 70 km SW at light, 14–24.III.1995, A.J. Watts leg.” ( SAMA); 2 exs., “Greenvale, 70 km SW at light, 1–10.III.1996, A.J. Watts leg.” ( SAMA); 8 exs., “SE QLD, 60 km S Brisbane, 10 km NNW Canungra, 27°57’18.1”S 153°08’56”E, 25.VIII.2004, leg. Jäch (AU11)” ( NMW); 5 exs. “ Australia: N QLD, 20 km NE Mareeba, Hodzic Road, 361m, 12.IX.2006, 16.49.556S 145.27.211E, L. & E. Hendrich leg. (QLD 28)” ( CLH, ZSM); 30 exs., “N QLD, Cape Tribulation Road S of ferry station, forest swamp, 12m, 15.IX.2006, 16.17.469S 145.19.122E, L. & E. Hendrich leg. (QLD 35)” ( ZSM, CLH); 114 exs., “ Australia: N QLD, 4 km NW Cardwell, Ellerbeck Road, 13m, 19.IX.2006, 18.14.520S 145.58.458E, L. & E. Hendrich leg. (QLD 38)” ( ZSM, CLH); 5 exs., “N QLD, 5 km NW Cardwell, street to Carruchan, 7m, 20.IX.2006, 18.14.316S 145.59.257E, L. & E. Hendrich leg. (QLD 39)” ( ZSM, CLH); 12 exs. “ Australia: C QLD, 10 km S Mirani, Lake Kinchant, seapage, 48m, 24.IX.2006, 21.11.580S 148.53.522E, L. & E. Hendrich leg. (QLD 46)” ( ZSM, CLH); 110 exs., “ Australia: C QLD, Mackay, 33 km S Sarina, Bolingbroke Road at Railway Cross., 221m, 24.IX.2006, 21.38.378S 149.08.183E, L. & E. Hendrich leg. (QLD 48)”, six specimens with “MB2813”, “MB2814”, “MB1989”, “MB1990”, “MB1991”, “MB2812” [green printed label] ( ZSM); 3 exs., “ Australia: S QLD, 8 km SE Miriam Vale, road to Agnes Water, Oyster Creek, 18m, 25.IX.2006, 24.20.393S 151.46.436E, L. & E. Hendrich leg. (QLD 50)” ( ZSM); 2 exs., “ Australia: S QLD, 15 km S Agnes Water, entrance Errimbula NP, 15m, 25.IX.2006, 24.15.193S 151.49.222E, L. & E. Hendrich leg. (QLD 51)” ( ZSM); 1 ex., “ Australia: S QLD, 40 km E Bundaberg, Tusky Creek, 9m, 26.IX.2006, 24.39.139S 152.01.477E, L. & E. Hendrich leg. (QLD 52)” ( ZSM); 3 exs. “ Australia: S QLD, 23 km SE Maryborough, road to Poona, Scrubby Creek, 3m, 28.IX.2006, 25.43.419S 152.52.214E, L. & E. Hendrich leg. (QLD 59)” ( ZSM, CLH); 7 exs., “ Australia: S QLD, Tuan State Forest near Poona Crk., water point 9, Scrubby Crk. upstream, 20m, 29.IX.2006, 25.44.449S 152.51.316E, L. & E. Hendrich leg. (QLD 60)” ( CLH, ZSM); 3 exs., “ Australia: S QLD, N Brisbane, Caboolture/Beerburrum road, near King John Creek, 29m, 9.X.2006, 27.03.014S 152.57.021E, L. & E. Hendrich leg. (QLD 62)”, “MB2406”, “MB2309”, “MB2310” [green printed label] ( ZSM). New South Wales. 10 exs., “ Australia: N NSW, 30–35 km S Casino, road to Grafton, rest pool of creek, 103m, 13.X.2006, 29.13.047S 152.59.296E, L. & E. Hendrich leg. ( NSW 71)” ( CLH, ZSM); 1 ex. “ Australia: N NSW, 10 km SE Grafton, road to Wooli, Picaninny Creek, 19m, 15.X.2006, 29.47.106S 153.02.070E, L. & E. Hendrich leg. ( NSW 76)” ( ZSM); 16 exs., “NSW Failford, 8 km N 18.IX.1997, C.H.S. Watts leg.” ( SAMA). Western Australia. 2 exs., “East Kimberley, Gibb River Road, Durack River Crossing, 250 m, 13.VI.1999, Hendrich leg. Loc. 6/106” ( CLH); 1 ex., “East Kimberley Gibb River Road, Dawn Creek Crossing, 300 m, 13.–14.VI.1999, Hendrich leg. Loc. 7/107” ( CLH); 8 exs., “ Western Australia, East Kimberley, Gibb River Road, Drysdale River Crossing, 380 m, 14.VI.1999, Hendrich leg./loc. 9/109” ( CLH); 5 exs., “East Kimberley, Gibb River Road, King Edward River Crossing, 280 m, 15.VI.1999, Hendrich leg. Loc. 10/110” ( CLH); 1 ex., “ Western Australia, East Kimberley, Gibb River Road 10 km W Hann River, Snake Creek 470 m, 19.VI.1999 Hendrich leg./loc. 16/116” ( CLH, ZSM); 3 exs., “ Australia WA, East Kimberley, Gibb River Raod, Barnett River Gorge, 450 m, 19.VI.1999, Hendrich leg./loc. 17/117” ( CLH); 2 exs., “West Kimberley, Gibb River Road, Galvans Gorge, 420 m, 21.VI.1999, Hendrich leg. Loc. 19/119” ( CLH); 1 ex., “ Western Australia, West Kimberley, Gibb River Road, Bell Gorge/Bell Creek, 340 m, 22.VI.1999, Hendrich leg./loc.21/121” ( CLH); 2 exs., “East Kimberley N.N. Creek 40 km W Kununurra, 50m, 29.VI.1999, Hendrich leg. Loc. 30/130” ( CLH). Papua New Guinea. 2 exs., “ Papua New Guinea: Western Province, Balimo, 9.–11.XI.2008, 08.01.823 S 142.57 .458, 0m, Posman (PNG185)” ( ZSM); 2 exs., “ Papua New Guinea: Central, Moreguina, 18.VIII.2008, 08.01.823 S 142.57 .458, Om, Posman” ( ZSM); 6 exs., “ Papua New Guinea: Central, Kokoda Trek, 590 m, i.2008, 14.33, 9 S 147.36 .920, Posman, (PNG 170)” ( ZSM); 5 exs., “ Papua New Guinea: Madang Trans Gogol, 30m, ii.2008, 5 1809.15S 145 3645.32E, BRC leg. (PNG 179)”, “M. Balke 3123” [green printed label] “M. Balke 4104”, “M. Balke 4106”, “M. Balke 4107”, “M. Balke 4108”, “M. Balke 4109” [green printed label] ( ZSM); 12 exs. “ Papua New Guinea: Sandaun, Mianmin, Fak River, 775m, 15.xi.2003, 4 53 53.00S 141 3639.40E. K. Sagata (WB27), “M. Balke 4201” [green printed label], “M. Balke 4202” [green printed label] ( ZSM). New Guinea. 2 exs., “Papua, Rouaffer, Iratoi, hill in forest, 164m, 6.ix., -3,2403086 137,332 9744, Sumoked ( PAP 028)”,“MB6479”, “MB6480” [green printed label] ( MZB, ZSM); 2 exs., “W.-Neuguinea/Paniai Prov. Wanggar-Kali Bumi/IR14, 30.9.- 1.10.1990 leg. Balke & Hendrich” ( CLH); 2 exs., “Papua Merauke, Wasur, pools, 20m, 15.–16.x.2011 14.42.748S 141.36.096E, tim UNCEN (Pap02)”, “MB5019”, “MB5020” [green printed label] ( MZB, ZSM). 6 exs., “Papua Merauke, Wasur, pools, 20m, 15.–16.x.2011 14.42.748S 141.36.096E, tim UNCEN (Pap02)” ( ZSM); 3 exs., “W-Papua Raja Ampat Prov. Salawati Isl. or., 2–4 km N Kalobo 01°00’56”S 131°04’58”E 26.1.2004 leg. A. Skale” ( ZSM). Aru Islands. 2 exs., “Temporary/Sago pools, Primary mixed forest”, “Aru Islands, Trangan, 1 km S. of Popjotur, 6°48’S 134°4’E, 10.VIII.1994, 90m, A.H. Kirk-Spriggs” ( CLH).

Description of male. Externally characterized by a widely oval body outline smooth at junction of pronotum and elytra, dense elytral punctation and almost testaceous to pale ferruginous body with indistinct darker markings. Dorsoventrally rather domed. Elytron with a well-marked ridge continuing line of pronotal lateral margin backwards, ridge obsolete in the middle of the elytron.

Measurements. TL = 1.9–2.25 mm, TL-H = 1.7–1.9 mm; TW = 1.1–1.3 mm.

Head. Ferruginous, alongside eyes almost black. Cervical line present. Rather shiny, with scattered small punctures ( Fig. 3A ). Punctures weak and smaller anteriorly and larger posteriorly between eyes. Microreticulation weak along eyes and posterior margin of head. Antennae ferruginous, antennomeres 2–10 almost as wide as long.

Pronotum. Yellowish, posterior margin with two blackish markings, broadest at base, shiny and microsculpture absent. Punctation of varying size, almost evenly distributed, Sides of pronotum margined and almost evenly rounded. Basal pronotal plicae present. Striae well defined, almost 1/2 length of pronotum, strongly incurved.

Elytra. Yellowish, with indistinct darker markings ( Figs 1A, B ). Coarsely and densely punctate, with silky shine, microsculpture absent. Striae strongly impressed, same length as basal pronotal striae but straighter. Elytron with wellmarked ridge continuing line of pronotal lateral margin backwards, ridge obsolete in the middle of elytron.

Ventral surface. Ferruginous ( Fig. 2A ). Metacoxae and metaventrite covered with numerous strong punctures, surface shiny, without microreticulation ( Fig. 4C ). Abdominal ventrites 1 and 2 with dense strong punctures, microreticulation absent. Metacoxal lines raised, subparallel, well separated ( Fig. 4C ). Epipleuron testaceous, with few punctures, shiny, lacking microsculpture, and without transverse epipleural carina at humeral angle ( Fig. 2A ). Legs completely ferruginous.

Male. Median lobe of aedeagus in ventral and lateral view as in Fig. 5A, B . Paramere bi-segmented as in Fig. 5C .

Affinities. This species can be easily distinguished by its roundish body ( Figs 1A, B ) and the shape of the median lobe of aedeagus ( Figs 5A, B ).

Notes on synonymy of Bidessus loriae Régimbart, 1892 . After examining various morphological characters (especially the male genitalia) of the syntypes of B. loriae , it is clear that B. loriae is identical to L. migrator . Combining the morphological characters of these types and cox1 DNA sequence data from different populations of L. migrator in Australia and New Guinea, it can be confirmed that Bidessus loriae Régimbart, 1892 is a junior subjective synonym of L. migrator Sharp (1882) .

Collecting notes. In Australia collections of single specimens or small numbers of beetles were made from almost all habitat types. The largest series were collected from flooded meadows, isolated residual and side pools of more open seasonal rivers and streams without any aquatic vegetation. The bottom of these habitats consisted of gravel, sand and a layer of decaying sedges and leaves ( Figs 11 , 12 ). In New Guinea the species was collected in the shallow and well vegetated flood zone of a slowly flowing lowland stream ( Fig. 13 ). In many places, also on New Guinea, sympatric if not syntopic with L. surianiae sp. nov. and L. wattsi sp. nov. Leiodytes migrator is also attracted to light. The range of latitude of this species is from near sea level in Australia up to 775 m in New Guinea.

Distribution. Australia, northern parts of Western Australia (Kimberley Region), the Northern Territory, Queensland, north-eastern New South Wales ( Watts 1978, Lawrence et al. 1987), New Guinea and Aru Islands ( Fig. 8 ). First record for Western Australia and New Guinea.

Figures

FIGURE 1. Body outline and colour pattern of: (A) L. migrator from North Queensland, near Cardwell; (B) L. migrator from Ubirr Rock, Kakadu NP, Northern Territory; (C) L. surianiae sp. nov.; (D) L. wattsi sp. nov. (Scale bar = 1 mm)

FIGURE 2. Ventral surface of: (A) L. migrator; (B) L. surianiae sp. nov.; (C) L. wattsi sp. nov. (Scale bar = 1 mm)

FIGURE 3. Dorsal surface of head of: (A) L. migrator; (B) L. surianiae sp. nov.; (C) L. wattsi sp. nov. (Scale bar = 0.5 mm)

FIGURE 4. Morphological details of: L. migrator (A–C): (A) Head, pronotum and basal part of elytra with striae und punctation; (B) Prosternal process; (C) Metacoxae and metacoxal lines with metacoxal processes. L. wattsi sp. nov. (D): Metacoxae with numerous quite strong punctures, and metacoxal lines with metacoxal processes. Clypeodytes larsoni (E): Epipleuron anteriorly with a basal cavity posteriorly limited by a transverse carina (yellow arrows). L. migrator (F): Epipleuron anteriorly lacking a basal cavity posteriorly limited by a transverse carina (yellow arrows).

FIGURE 5. Leiodytes migrator: Median lobe of aedeagus: (A) ventral view, (B) lateral view; right paramere (inner surface): (C) lateral view. (Scale bar = 0.15 mm)

FIGURE 8. Distribution of L. migrator.

FIGURE 10. Maximum likelihood tree for Australasian Leiodytes. Neighbour joining tree (p-distances) calculated with Geneious (11.0.4.) software. The stars mark those specimens distributed over two divergent clades of L. migrator, which, however, occur syntopically.

FIGURE 11. Habitat of L. migrator: (A) Northern Territory, Kakadu NP, Old Jim Jim Road, rest pool of Barramundi Creek (NT 19); (B) Queensland, Cardwell, sandy and exposed pool, without emergent vegetation near Ellerbeck Road (QLD 38).

FIGURE 12. (A) Creek at Manton Dam, Northern Territory (NT 1), habitat of L. wattsi sp. nov. and L. migrator; (B) Queensland, Forest swamp near Cape Tribulation Road, south of Daintree ferry station (QLD 35), habitat of L. surianiae sp. nov., L. wattsi sp. nov. and L. migrator (B).

FIGURE 13. (A) Shallow and exposed pools on a forest clearing near Kali Bumi, Wanggar, Nabire, W New Guinea, habitat of L. migrator; (B) Rest pool, bottom with very thick layer of leaves (up to 70 cm), and margins with area of wet leaves that form small open water once stepped on, open savanna forest in Wasur, S New Guinea, habitat of L. migrator and L. wattsi sp. nov.