Hydraena queenslandica, Published, 2007

PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), Zootaxa 1489 (1), pp. 1-207 : 107-109

Hydraena queenslandica new species

(Figs. 179, 184, 223, 259)

Type Material. Holotype (male): Queensland, Laceys Creek , 10 km SE El Arish, flight intercept trap, rainforest, elev. 40 m, 27° 11' S, 152° 47' E, 23 June–5 August 1982, S. & J. Peck. Deposited in the ANIC . Paratypes (615): Queensland, 11 km up Mt. Lewis Road, via Julatten, MDPI intercept trap, site No. 1, flight intercept trap, 16° 37' S, 145° 21' E, 9–23 November 1982, Morgan, Brown, Storey (3 QMBA) ; same locality, elev. 900 m, 16° 37' S, 145° 21' E, 11 November–25 December 1987, Storey & Walford-Huggins (2 QMBA) ; 15 km S Ravenshoe, nr. Tully Falls , rainforest, 17° 47' S, 145° 34' E, 9 December 1990, D. Larson (37 MCZ) ; 17 km NE of Mt. Molloy , 16° 40' S, 145° 19' E, 20 December 1986, H. & A. Howden (2 ANIC) ; 17 km up Mt. Lewis Road , 16° 37' S, 145° 21' E, 1 November 1990, S. DeFaveri & R. Storey (1 QPIM) ; 2 km SE Mt Spurgeon, via Mt Carbine , rainforest, flight intercept trap, elev. 1100 m, 16° 26' S, 145° 12' E, 20 December 1988 – 4 January 1989, Monteith, Thompson & ANZSES (3 QMBA) ; 21 km up Mt. Lewis Road , 16° 37' S, 145° 21' E, 1 November 1990, S. DeFaveri & R. Storey (4 QPIM) ; 4 km NNW of Kuranda, MDPI intercept trap, site No. 22, 16° 47' S, 145° 36' E, 20 September–6 November 1984, Storey & Halfpapp (1 QPIM) ; 4 km S Yungaburra , 17° 17' S, 145° 34' E, 6 November 1990, D. Larson (38 MCZ) ; 40 km up Windsor Tableland road, 16° 13' S, 145° 2' E, 12 November 1990, Storey, DeFaveri & Halfpapp (1 QPIM) ; 40 km W Ingham, near Wallaman Falls , flight intercept trap, rainforest, elev. 600 m, 18° 36' S, 145° 48' E, 22 June–7 August 1982, S. & J. Peck (2 ANIC) ; 5 km NNW of Kuranda, MDPI intercept trap, site No. 24, flight intercept trap, 16° 46' S, 145° 36' E, 20 February–20 March 1985, Storey & Halfpapp (4 QPIM) ; same locality, 16° 46' S, 145° 36' E, 20 March–1 May 1985, Storey & Titmarsh (2 QPIM) ; 6 km NW of Kuranda, MDPI intercept trap, site No. 21, flight intercept trap, 16° 48' S, 145° 35' E, 6 November–10 December 1984, Storey & Halfpapp (1 QPIM) ; 6 km SW of Kuranda, MDPI intercept trap, site No. 20, flight intercept trap, 16° 51' S, 145° 36' E, 20 September–6 November 1984, Storey & Halfpapp (1 QPIM, 2 QPIM) ; 7 km WNW of Paluma, MDPI F. I. T. Site 32, flight intercept trap, 19° 0' S, 146° 12' E, 30 November–16 December 1988, Storey & Brown (2 QMBA) ; same locality, 19° 0' S, 146° 12' E, 16 December 1988 – 13 January 1989, Storey & Dickinson (1 QMBA) ; 7.5 km NNW of Kuranda, MDPI intercept trap, site No. 23, flight intercept trap, 16° 45' S, 145° 36' E, 15 January–20 February 1985, Storey & Halfpapp (1 QPIM, 4 QPIM) ; 9 km NE Julatten , flight intercept trap, 16° 37' S, 145° 21' E, 26 December 1986, H. & A. Howden (2 ANIC) ; Birthday Ck., 6 km NWbyW of Paluma , leaf and log litter; berlesate ANIC 682 , 19° 0' S, 146° 12' E, 25 September 1980, T. Weir (3 ANIC) ; Boar Pocket Rd. , c. 8 km N of Gillies Hwy., 17° 12' S, 145° 37' E, 26 December 1969, J. G. Brooks (1 ANIC) ; Boar Pocket Rd. , c. 8 km N of Gillies Hwy., at light, 17° 12' S, 145° 37' E, 21 February 1970, J. G. Brooks (1 ANIC) ; Cape Tribulation, Daintree N. P., Turpentine Road, elev. 120 m, 16° 9' S, 145° 22' E, 8 November 1996, L. Hendrich (18) (2 NMW) ; Charmillin Creek , elev. 940 m, 17° 42' S, 145° 31' E, 1 December 1997, Monteith, Cook, Burwell (1 QMBA) ; Charmillin Creek Xing, Tully Falls Rd. , pitfall and intercept traps, elev. 950 m, 17° 42' S, 145° 31' E, 8 December 1989 – 5 January 1990, Monteith, Thompson, Janetzki (3 QMBA) ; Cow Bay, N of Daintree River, MDPI intercept trap site No. 10, intercept trap, 16° 13' S, 145° 27' E, 25 October–15 November 1987, Storey & Cunningham (1 QPIM) ; Cow Bay, N of Daintree River, MDPI intercept trap site No. 11, intercept trap, 16° 13' S, 145° 27' E, 15 November–14 December 1987, Storey & Cunningham (1 QPIM) ; same locality, 16° 13' S, 145° 27' E, 14 December 1987 – 6 January 1988, Storey & Cunningham (2 QPIM) ; same locality, 16° 13' S, 145° 27' E, 6 January–5 February 1988, Storey & Cunningham (1 QPIM) ; same locality, 16° 13' S, 145° 27' E, 6 February–23 March 1988, Storey & Cunningham (2 QPIM) ; Danbulla S. F., 13 km NE Yungaburra, MDPI intercept trap site No. 27, flight intercept trap, 17° 10' S, 145° 39' E, 1 December 1986 – 30 November 1987, Storey & De Faveri (21 QPIM) ; Douglas Shire, Ellis Beach , 30 km N Cairns, 16° 55' S, 145° 46' E, 11 January 1991, D. Larson (1 MCZ) ; Flaggy Creek, 30 km N Kuranda, Black Mtn. Rd. , 16° 49' S, 145° 38' E, 29 November 1990, D. Larson (185 MCZ) ; Gadgarra State Forest , 10 km E Lake Eacham, pitfall and flight intercept, elev. 700 m, 17° 16' S, 145° 44' E, 9–31 December 1989, Monteith, Thompson, Janetski (2 QMBA) ; Hann Tableland ( North end), rainforest, elev. 950–1000 m, 16° 49' S, 145° 11' E, 11–14 December 1995, Monteith, Thompson, Cook (6 QMBA) ; Hugh Nelson Ra., 21 km S. Atherton , MDPI Intercept Trap No. 16, flight intercept trap, 17° 26' S, 145° 28' E, 1 December 1983 – 9 January 1984, Storey & Brown (1 QMBA) ; Hunter's Creek , 5 km NE Mt. Mullay, 18° 7' S, 145° 8' E, 15 November 1990, D. Larson (1 MCZ) ; Kauri Creek, Tinaroo L., NE Atherton , 17° 24' S, 145° 29' E, 24 October 1990, D. Larson (2 MCZ) ; Kirrama Range , 22 km NE Kennedy, blacklight, elev. 800 m, 18° 6' S, 145° 42' E, 11 December 1986, H. & A. Howden (1 CMNO) ; Kuranda, Rain forest , malaise trap, elev. 1000 m, 16° 47' S, 145° 36' E, 17–24 February 1984, L. Masner (1 CMNO) ; Laceys Creek , 10 km SE El Arish, flight intercept trap, rainforest, elev. 40 m, 27° 11' S, 152° 47' E, 23 June–5 August 1982, S. & J. Peck (28 ANIC) ; Lake Eacham N. P., elev. 760 m, 17° 18' S, 145° 38' E, 23 July 1982, S. & J. Peck (4 ANIC) ; Massey Ck., BS3, F. I. Trap JCU ( West ), elev. 1000 m, 17° 37' S, 145° 34' E, 3 January–4 February 1995, P. Zborowski (1 ANIC) ; Millaa Millaa Falls, MDPI F. I. T. Site 34, flight intercept trap, 17° 30' S, 145° 36' E, 7 February–13 March 1990, Storey & Halfpapp (3 QPIM) ; Mt. Boolbun South , elev. 850–1000 m, 15° 57' S, 145° 8' E, 4–6 November 1995, Monteith, Cook, Roberts (7 QMBA) ; Mt. Finnigan summit, flight intercept, site 4, elev. 1060 m, 15° 48' S, 145° 17' E, 4 December 1990 – 17 January 1991, Qld. Mus. & ANZSES (14 QMBA) ; Mt. Finnigan summit, flight intercept, site 5, elev. 1080 m, 15° 48' S, 145° 17' E, 4 December 1990 – 17 January 1991, Qld. Mus. & ANZSES (1 QMBA) ; Mt. Lewis , elev. 1010 m, 16° 37' S, 145° 21' E, 20 June 1971, Taylor Feehan (1 ANIC) ; Mt. Lewis , 20 km SW Mossman, flight intercept trap, rainforest, elev. 1000 m, 16° 28' S, 145° 21' E, 26 June–1 August 1982, S. & J. Peck (3 ANIC) ; Mt. Lewis , 8 km NW of Julatten, 16° 37' S, 145° 21' E, 8 January–2 February 1987, R. Storey & H. Howden (2 ANIC) ; Mt. Lewis , flood debris and leaf litter, elev. 960 m, 16° 37' S, 145° 21' E, 19 August 1982, J. & N. Lawrence (2 ANIC) ; Nelson Range , 19 km NW Millaa Millaa, flight intercept trap, rainforest, elev. 1080 m, 12° 38' S, 143° 15' E, 24 June–2 August 1982, S. & J. Peck (2 ANIC) ; Nigger Cr. trib., 23 km S Atherton, 17° 16' S, 145° 24' E, 18 October 1990, D. Larson (3 MCZ) ; Paluma Dam Rd. , site 1, flight intercept trap, elev. 900 m, 19° 0' S, 146° 12' E, 8 December 1990 – 5 February 1991, Monteith & Seymour (1 QMBA) ; Paluma Dam Road, via Paluma , rainforest flight intercept trap, elev. 850 m, 19° 0' S, 146° 12' E, 22 June–6 August 1982, S. & J. Peck (86 ANIC) ; Polly Creek , pitfall traps, elev. 50 m, 17° 28' S, 146° 1' E, 25 November 1994 – 10 January 1995, Monteith & Hasenpusch (1 QMBA) ; Ravenshoe S. F., Tully Falls Road, rainforest intercept trap, 17° 47' S, 145° 34' E, 15 November–12 December 1987, A. Walford-Huggins (3 ANIC) ; Rocky Creek , small flowing, clear stream, sandy bottom with rocks, full shade: rainforest, 16° 35' S, 145° 17' E, 16 December 1994, P. Zborowski (9 ANIC) ; Tully Falls S. F., 11 km SSW Ravenshoe, MDPI intercept trap site No. 29B, flight intercept trap, elev. 900 m, 17° 42' S, 145° 31' E, 1 October–5 November 1987, Storey & Dickinson (1 QPIM) ; same locality, elev. 900 m, 17° 42' S, 145° 31' E, 5 January–7 February 1988, Storey & Dickinson (1 QPIM) ; same locality, elev. 900 m, 17° 42' S, 145° 31' E, 9 February–3 March 1988, Storey & Dickinson (2 QPIM) ; same locality, elev. 900 m, 17° 42' S, 145° 31' E, 5 November–7 December 1988, Storey & Dickinson (1 QMBA, 2 QPIM) ; Tully Falls S. F., 18 km SSW Ravenshoe, malaise trap, elev. 730 m, 17° 45' S, 145° 32' E, 1 October–5 November 1987, Storey & Dickinson (1 QPIM) ; Tully Falls S. F., 18 km SSW Ravenshoe, MDPI intercept trap site No. 29C, flight intercept trap, elev. 730 m, 17° 45' S, 145° 32' E, 20 April–25 May 1988, Storey & Dickinson (2 QPIM) ; Tully Falls S. F., 9.5 km SSW Ravenshoe, MDPI intercept trap site No. 29A, flight intercept trap, elev. 900 m, 17° 41' S, 145° 30' E, 7 December 1987 – 7 January 1988, Storey & Dickinson (1 QPIM) ; Windsor Tableland , 38 km from main road, intercept trap, site no. 14C, flight intercept trap, 16° 15' S, 145° 3' E, 5 March–8 May 1986, Storey & Brown (3 QPIM) ; Windsor Tableland , flight intercept trap, 16° 13' S, 145° 2' E, 28 February–6 March 1992, J. Hasenpusch (2 QPIM) ; Windsor Tableland via Mt. Carbine , intercept trap, site no. 14a, flight intercept trap, 16° 15' S, 145° 2' E, 12 November–26 December 1983, Storey & Walford-Huggins (1 QPIM) ; Windsor Tablelands, Foxwood Stn. , 16° 13' S, 145° 2' E, 6 February 1991, D. Larson (36 MCZ) ; Windsor Tablelands , km 40 access road, 16° 13' S, 145° 2' E, 12 November 1990, D. Larson (8 MCZ) ; Windsor Tablelands , roadside pond, 16° 13' S, 145° 2' E, 7 February 1991, D. Larson (26 MCZ) ; Wongabel S. F., 6 km S of Atherton, MDPI Intercept Trap No. 18, flight intercept trap, 17° 19' S, 145° 28' E, 10 November–1 December 1983, Storey & Brown (1 QMBA) ; Wongabel S. F., 6 km S of Atherton, MDPI Intercept Trap No. 18, flight intercept trap, 17° 19' S, 145° 28' E, 9 January–10 February 1984, Storey & Brown (1 QMBA) .

Differential Diagnosis. Recognized by the combination of the large body size (ca. 2.00 mm), the very coarsely and densely punctate pronotum, the coarsely punctate elytra, and, in males, the very large metatibial brush, with undulating tips. H. queenslandica is differentiated from H. pilipes , the males of which also have large metatibial brushes, by the differently shaped and less densely punctate pronotum, and the more regular elytral series near the scutellum (Figs. 177–179). The male genitalia of the two species differ markedly (Figs. 181–184).

Description. Size (length/width, mm) holotype: body (length to elytral apices) 2.02/0.81; head 0.32/ 0.42; pronotum 0.48/0.61, PA 0.50, PB 0.57; elytra 1.25/0.81. Dorsum brown to dark brown, head and pronotal disc darker, palpi light brown, not darkened apically.

Frons punctures ca. 1.5xef, each with short seta; interstices 0.5–1xpd. Clypeus microreticulate laterally, finely sparsely punctate medially. Mentum microreticulate, dull; postmentum microreticulate. Genae raised, lacking posterior ridge. Pronotum densely coarsely punctate, punctures on disc deep, slightly elongate, ca. 3xpd those of frons, interstices usually less than 1xpd, often narrow walls forming reticulate pattern; PF1, PF2 and PF4 absent; PF3 moderately deep, broad.

Elytral punctures slightly larger than largest pronotal punctures. Intervals not raised, shining, width ca. 1xpd or less, as are interstices between punctures of a row. Apices in dorsal aspect conjointly rounded, in posterior aspect margins forming marked angle with one another.

Ratios of P2 width and plaque shape (P2/w/l/s) ca. 2/1/1/3. P1 laminate; median carina angulate in profile. P2 moderately narrow, l/w ca. 2/1, sides slightly diverging toward blunt apex. Plaques small ovals located at posterior margins of deep, median depression. No midlongitudinal carina between mesoventral intercoxal process and plaques. Cuticle asperite under hydrofuge pubescence. AIS flat, width at straight posterior margin 2x P2. Profemur (male) with small tubercle on median surface near basal 1/3; protibia straight, not widened subapically; mesotibia simple; metatibia slender, medial surface very weakly sinuate and with large brush of dense and strong setae over distal 3/4. Abdominal apex asymmetrical.

Aedeagus (Fig. 184) main-piece with large, finger-shaped lobe on ventral surface, near base; left paramere very large, with three groups of setae, medioventral part flexible and with minute processes along margin; right paramere lobe-shaped apically, with setae in two groups; distal piece with large, somewhat human headshaped process. Female last tergite with three incisions, delimiting four lobes, setae slender, tapering; gonocoxite as illustrated (Fig. 223).

Etymology. Named in reference to the geographical distribution.

Distribution. Currently known from many localities in and around the Atherton Tablelands, and two disjunct localities, one each in far northern and far southern Queensland (Fig. 259).

Remarks. Females have simple legs; the metaventral depression and small plaques do not differ notably from those of males.