Hydraena hamifera Zwick, 1977

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 : 95-96

Hydraena hamifera Zwick, 1977

(Figs. 160, 167, 219, 253)

Hydraena hamifera Zwick, 1977: 180 .

Type Material. Holotype (male): Queensland, Lever’s Plateau via Rathdowney , [ca. 28° 11' S, 152° 48' E] [labels: "Lever's Plateau, via Rathdowney, 2.iv.1965. S.E.Q. T. Weir // T. 7226. // Hydraena hamifera sp. n. det. P. Zwick 1975 Holotype "]. Deposited in the QMBA.

Differential Diagnosis. Recognized by the moderately densely punctate pronotal disc with smooth interstices, the almost parallel-sided elytra with comparatively wide explanate margin, the slightly raised plaques, and, in males, the band of recumbent setae on the inner surface of the metatibia (Fig. 160). Specimens are usually slightly less densely and less coarsely punctate than other members of the hamifera group. The aedeagus (Fig. 167) is very distinctive; in some cases it will be necessary to dissect males for certain determinations.

Description. Size: holotype (length/width, mm): body (length to elytral apices) 1.63/0.69; head 0.22/ 0.39; pronotum 0.38/0.54; elytra 1.00/0.69. Dorsum reddish brown, lateral margins of pronotum, legs and palpi lighter, head darker.

Frons punctures slightly larger than 1xef; interstices shining, 1–3xpd. Clypeus microreticulate. Mentum shining, very finely sparsely punctate; postmentum microreticulate. Genae raised, lacking posterior ridge.

Pronotal punctures on disc ca. 2xpd and deeper than those of frons, interstices shining, 1–3xpd, punctures denser at anterior; PF1 and PF4 absent; PF2 very small and shallow; PF3 microreticulate, moderately deep.

Elytra rather parallel sided, moderately explanate, posterior declivity moderately abrupt; serial punctures very regular, about equal size of largest pronotal punctures; intervals not raised, shining, width ca. 1xpd, as are interstices between punctures of a row; apices in dorsal aspect gradually rounded to subtruncate, in posterior aspect margins form shallow angle with one another.

Ratios of P2 width and plaque shape (P2/w/l/s) ca. 1/1/4/1. P1 almost laminate; median carina posterior extreme slightly more elevated than remainder. P2 narrow, l/w ca. 3/1, sides parallel, apex blunt. Plaques located in posterior 3/5 of metaventrite at margin of median depression, plaques slightly convergent anteriorly, each plaque slightly raised, gradually tapering anteriorly. AIS flat, width at arcuate posterior margin 2– 3x P2. Protibia weakly arcuate, slightly thickened in distal 1/2; metatibia with weak brush of recumbent and/ or decumbent setae on medial surface of distal 7/10. Last sternite slightly asymmetrical, margin with very small point; last tergite with deep, asymmetrical, off-center concavity.

Aedeagus (Fig. 167) main-piece with large, arm-shaped process; base very asymmetrical; three terminal processes, two of which are smaller and adjacent; parameres simple. Female last tergite with three incisions, delimiting four lobes, setae slender, tapering. Female last tergite with three incisions, delimiting four lobes, setae slender, tapering; gonocoxite as illustrated (Fig. 219).

Distribution. Widely distributed in the far eastern area, from Queensland to Victoria (Fig. 253).

Notes. Plaques of females tend to be slightly wider and slightly closer together than those of males. This species, originally described from five specimens, is one of the most commonly collected Australian Hydraena ; I have identified 927 specimens from 106 localities.

Material Examined (927): Australian Capital Territory, Mt. Ainslie , dry sclerophyll gully, leaf litter, 35° 16' S, 149° 10' E, 9 January 1968, C. G. Brooks (4 ANIC) ; New South Wales, 48 km N Singleton, Mt. Royal St. For. , rainforest litter nr. stream, FMHD #83-285 , 33° 56' S, 149° 59' E, 23 July 1983, L. E. Watrous (4 FMNH); 48 km N Singleton, Tuglo Wildlf. Ref. , damp litter at “Big Spring”, FMHD #83-282 , 33° 56' S, 149° 59' E, 23 July 1983, L. E. Watrous (5 FMNH); 48 km N Singleton, Tuglo Wildlf. Ref. , litter nr stream, FMHD #83-286 , 33° 56' S, 149° 59' E, 24 July 1983, L. E. Watrous (9 FMNH); 48 km N Singleton, Tuglo Wildlf. Ref. , rainforest litter along “Turkey Crk.”, FMHD #83-283 , 33° 56' S, 149° 59' E, 23 July 1983, L. E. Watrous (5 FMNH); 48 km N Singleton, Tuglo Wildlf. Ref. , rainforest litter, FMHD #83-250 , 33° 56' S, 149° 59' E, 9 July 1983, L. E. Watrous (10 FMNH); 48 km N Singleton, Tuglo Wildlf. Ref. , rainforest litter, FMHD #83-252 , 33° 56' S, 149° 59' E, 9 July 1983, L. E. Watrous (21 FMNH); 48 km N Singleton, Tuglo Wildlf. Ref. , swamp litter with tree ferns, FMHD #83-251 , 33° 56' S, 149° 59' E, 9 July 1983, L. E. Watrous (2 FMNH); Barrengarry Mt. , 24 km SE Mossvale, rainforest log and leaf litter, elev . 600 m, 34° 39' S, 150° 29' E, 29 August 1982, S. & J. Peck (4 ANIC); Barrington House , 40 km NW Dungog, rainforest litter, elev . 400 m, 32° 9' S, 151° 31' E, 28 August 1982, S. & J. Peck (101 ANIC); Barrington House via Salisbury, 32° 9' S, 151° 31' E, 25–28 May 1963, A. Macqueen (6 ANIC); Beaury Creek , adjacent Woodenbong State Forest , ca. 8 km SW Woodenbong, ca. 120 km SW Brisbane, Residual pools and small rock pools in river bed ( Beaury Creek ), in cultivated cattle country, 28° 24' S, 152° 32' E, 25 August 2004, M. A. Jäch (AU 14) (5 NMW); Buckenbowra S. F., WNW Nelligen , Sugarloaf Creek , gallery subtropical rainforest, wet leaves and flood debris, forest stream, FMHD #87-268 , elev. 145 m, 35° 34' S, 150° 0' E, 18 February 1987, A. Newton & M. Thayer (834) (1 FMNH); Cabbage Tree Creek, Canberra / Coast Road, gravel and sand at edge of small densely shaded stream in sclerophyll forest, elev. 85 m, 35° 34' S, 150° 2' E, 22 July 2000, N. Porch (93) (1 ANIC); Cambewarra , rainforest litter nr. stream, FMHD #83-227 , 34° 49' S, 150° 34' E, 12 June 1983, L. E. Watrous (1 FMNH); Ingalla S. F., 13 km S Macksville, flight intercept trap, sclerophyll forest (wet), elev . 40 m, 30° 41' S, 152° 56' E, 12 June–26 August 1982, S. & J. Peck (1 ANIC); Kiola Forest Pk. , 15 km N Batemans Bay, wet sclerophyll litter, elev . 20 m, 35° 42' S, 150° 11' E, 30 August 1982, S. & J. Peck (SBP 119) (28 ANIC); Lorien Wildlife Refuge, Lansdowne via Taree , flight intercept trap, 33° 53' S, 150° 58' E, 1–30 December 1986, H. & A. Howden (8 ANIC); Macquarie Pass Nt. Pk. , rainforest litter, FMHD #83-260 , 34° 34' S, 150° 40' E, 13 July 1983, L. E. Watrous (2 FMNH); Macquarie Pass Nt. Pk. , rainforest litter nr. stream, FMHD #83-258 , 34° 34' S, 150° 40' E, 13 July 1983, L. E. Watrous (1 FMNH); Mt. Keira , rainforest litter nr. stream, FMHD #83-281 , 34° 23' S, 150° 51' E, 21 July 1983, L. E. Watrous (2 FMNH); Narrabeen Lagoon, Casurina Drift , FMHD #83-288 , 33° 40' S, 151° 17' E, 26 July 1983, L. E. Watrous (1 FMNH); O’Sullivan Gap Res. , 11 km NE Buladelah, flight intercept trap, sclerophyll forest (wet), elev . 50 m, 32° 24' S, 152° 13' E, 11 June–27 August 1982, S. & J. Peck (9 ANIC); Royal N. P., Palm Gully, off Lady Wakehurst Drive , subtropical rainforest, wet leaves & flood debris, forest stream, FMHD #86-669 , elev. 80 m, 34° 9' S, 151° 2' E, 25 December 1986, A. Newton & M. Thayer (774) (6 FMNH); Royal Nat. Park, 30 km S of Sydney, ex leaf log litter, 34° 9' S, 151° 2' E, 14 June 1978, S. & J. Peck (1 ANIC); Royal Nat. Park, leaf litter with hyphae, 34° 9' S, 151° 2' E, 5 June 1978, S. & J. Peck (7 ANIC); Unnamed creek drains into Crawleys Creek , 36° 56' S, 149° 43' E, 13–22 June 1999, J. & R . Miller (site 731) (16 ANIC); Unnamed creek drains into Nullica River , 37° 4' S, 149° 46' E, 25 October 1999, J. & R . Miller (site 661) (2 ANIC); Unnamed creek drains into Old Hut Creek , 37° 1' S, 149° 46' E, 12 October 1997, J. & R . Miller (site YNP) (1 ANIC); same locality, 37° 1' S, 149° 46' E, 12 June 1999, J. & R . Miller (site YNP) (1 ANIC); Unumgar S. F. (nr. Grevillia), Coxs Rd. , subtropical rainforest, flight intercept (window) trap, FMHD #87-175 , elev. 580 m, 28° 27' S, 152° 45' E, 2–11 January 1987, A. Newton & M. Thayer (789) (2 FMNH) ; Queensland, 1 km S Mt. Lewis , berlesate ANIC 947 rainforest, elev. 950 m, 16° 35' S, 145° 17' E, 28 March 1984, A. Calder & T . Weir (1 ANIC); 1.5 km SE Mt. Spurgeon, via Mt. Carbine , open forest, flight intercept trap, elev . 1100 m, 16° 26' S, 145° 12' E, 21 December 1988 – 5 January 1989, Monteith, Thompson & ANZSES (1 QMBA); 15 km ESE Warwick, Queen Mary Falls N. P., E Killarney, elev . 300 m, 28° 20' S, 152° 22' E, 26 August 2004, M. A. Jäch (AU 15) (2 NMW); 2 km N Mt. Lewis via Julatten , rainforest, elev . 1000 m, 16° 34' S, 145° 16' E, 9 September 1981, G. Monteith & D. Cook (11 QMBA); 2.5 km N Mt. Lewis via Julatten , rainforest, elev . 1040 m, 16° 34' S, 145° 16' E, 3 November 1983, D. K. Yeates & G. I. Thompson (35 QMBA); 20 km S of Ravenshoe , elev . 800 m, 17° 36' S, 145° 29' E, 3 July 1971, Taylor Feehan (2 ANIC); 30 km NE Brisbane, Mt. Nebo Road, Pond , ca . 200 m, Sclerophyll forest , elev . 540 m, 27° 24' S, 152° 48' E, 21 August 2004, M. A. Jäch (AU 1) (9 NMW); 4.0 km W of Cape Tribulation, rainforest, moss, sieved litter, QM berlesate no. 424, elev. 720 m, 16° 5' S, 145° 26' E, 1 October 1982, Monteith, Yeates, Thompson (site 8) (2 QMBA); 4.0 km W of Cape Tribulation, rainforest, sieved litter, QM berlesate no. 497, elev. 720 m, 16° 5' S, 145° 26' E, 29 December 1982, G. Monteith (( Site 8) (2 QMBA); 4.5–5.0 km W of Cape Tribulation (Top Camp), rainforest, moss, sieved litter, QM berlesate no. 442, elev. 760–780 m, 16° 5' S, 145° 26' E, 1 October 1982, Monteith, Yeates, Thompson (2 QMBA); 4.5–5.0 km W of Cape Tribulation (Top Camp), rainforest, moss, stick brushing, QM berlesate no. 488, elev. 760–780 m, 16° 5' S, 145° 26' E, 4 October 1982, Monteith, Yeates, Thompson (1 QMBA, 2 QMBA); 4.5–5.0 km W of Cape Tribulation (Top Camp), rainforest, sieved litter, QM berlesate no. 486, elev. 760–780 m, 16° 5' S, 145° 26' E, 1 October 1982, Monteith, Yeates, Thompson (2 QMBA); 40 km SSE Brisbane, Mt. Tambourine N. P., Cedar Creek , 27° 55' S, 153° 11' E, 22 August 2004, M. A. Jäch (AU 4) (6 NMW); 5 km S by W of Millaa Millaa, rainforest, ANIC berlesate #674, 17° 30' S, 145° 37' E, 11 August 1968, I. D. Naumann & J. C. Cardale (32 ANIC); 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 & Dickinson (1 QMBA); 8 km N Cooyar, flight intercept trap, Auracaria vine forest, elev . 300 m, 26° 56' S, 151° 55' E, 18 June–19 August 1982, S. & J. Peck (19 ANIC); 90 km SW Brisbane, 40 km NE Warwick , 28° 3' S, 152° 22' E, 26 August 2004, M. A. Jäch (AU 17) (10 NMW); Bellenden Ker Range, bottom cable station, rainforest, stick brushing, QM berlesate no. 22, elev. 75 m, 17° 17' S, 145° 53' E, 12 April 1979, G. B. Monteith (4 QMBA); Bellenden Ker Range, Cableway Base Station , rainforest sieved litter; Q. M. berlesate #308, elev . 100 m, 17° 16' S, 145° 54' E, 17–24 October 1981, Earthwatch / Qld Museum (4 ANIC); Bellenden Ker Range, Cableway Base Station , rainforest sieved litter; Q. M. berlesate #363, elev . 100 m, 17° 16' S, 145° 54' E, 17–31 October 1981, Earthwatch / Qld Museum (62 ANIC); Black Mt. Rd., 11 km N Kuranda, “Turkey Pocket”, 16° 49' S, 145° 38' E, 30 October 1969, J. G. Brooks (4 ANIC); Black Mtn. , 17 km ESE of Julatten, rainforest, sieved litter and moss, QM berlesate no. 413, elev. 1000 m, 16° 39' S, 145° 29' E, 29 April 1982, Monteith, Yeates, Cook (2 QMBA); Boar Pocket Rd., c. 8 km N of Gillies Hwy., 17° 12' S, 145° 37' E, 9 December 1969, J. G. Brooks (2 ANIC); Brandy Creek Rd , Conway S. F., rainforest, sieved litter, QM berlesate no. 63, elev. 60 m, 20° 20' S, 148° 42' E, 25 April 1979, G. Monteith (1 QMBA); Broken R ., Eungella N. P., berlesate complex meso/notophyll vine forest 23, elev. 700 m, 21° 10' S, 148° 30' E, 18 November 1981, A. Gillison (1 ANIC, 2 ANIC); Bunya Mts. N. P., rainforest litter, SBP 108, elev . 1000 m, 26° 51' S, 151° 34' E, 18 August 1982, S. Peck (2 ANIC); C. Qld: Mt. Hayward , RF intercept and pitfall, elev . 350 m, 20° 20' S, 148° 45' E, 20 November 1992 – 15 April 1993, D. Cook & G. B. Monteith (1 QMBA); Chujeba Peak summit, 7 km SW Redlynch, rainforest, sieved litter, QM berlesate no. 837, elev. 1000 m, 16° 56' S, 145° 39' E, 16 December 1989, G. Monteith & G. Thompson (1 QMBA); Chujeba Peak summit, 7 km SW Redlynch, rainforest, sieved litter, QM berlesate no. 838, elev. 1000 m, 16° 56' S, 145° 39' E, 16 December 1989, G. Monteith & G. Thompson (2 QMBA); 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 (12 QPIM); same locality, 17° 10' S, 145° 39' E, 20 December 1986 – 13 January 1987, Storey & De Faveri (1 QPIM); Davies Creek , 18 km EbyS of Mareeba, rainforest, ANIC berlesate 676, 16° 58' S, 145° 25' E, 18 May 1980, I. D. Naumann 7 J. C. Cardale (1 ANIC); Eungella N. P., 21° 11' S, 148° 31' E, 1–30 August 1996, J. S. Denton (1 NMW); Eungella N. P., Broken River , rainforest, elev . 700 m, 21° 11' S, 148° 31' E, 17 April 1979, G. Monteith (2 QMBA); Eungella N. P., Broken River , rainforest, sieved litter, elev . 700 m, 21° 11' S, 148° 31' E, 18 April 1979, G. B. Monteith (8 QMBA); Eungella N. P., Palm Lookout, stick brushing, QM berlesate 32, elev. 700 m, 21° 10' S, 148° 31' E, 18 April 1979, G. Monteith (3 QMBA); Eungella National Park, end of Dalrymple Road, puddle, 21° 2' S, 148° 34' E, 16 March 1997, P. Zwick (5 PZC); Hinchinbrook Is. , Gayundah Creek , rainforest, sieved litter, QM berlesate no. 670, elev. 80 m, 18° 22' S, 146° 13' E, 12 November 1984, Monteith, Davies, Thompson, Gallon (1 QMBA); Hinchinbrook Is., Upper Gayundah Creek , rainforest, sieved litter, QM berlesate no. 673, elev. 850 m, 18° 22' S, 146° 15' E, 10–11 November 1984, G. Monteith & D. J. Cook (1 QMBA); Isley Hills , rainforest, elev . 1050 m, 17° 3' S, 145° 42' E, 1 December 1993, G. Monteith & H. Janetzki (1 QMBA); Kirrama State Forest , 32 km NW of Cardwell, rainforest log and leaf litter, 18° 10' S, 145° 38' E, 8 August 1982, S. & J. Peck (48 ANIC); Lake Eacham N. P., elev . 760 m, 17° 18' S, 145° 38' E, 23 July 1982, S. & J. Peck (1 ANIC); Lambs Head via Mareeba, pitfall trap, 17° 1' S, 145° 38' E, 2 August 1992, K. H. Halfpapp (5 QPIM); Lever’s Plateau via Rathdowney, No. T . 7226, 28° 11' S, 152° 48' E, 2 April 1965, T . Weir (2 PZC); Longlands Gap Rd. Atherton Tableland, rain forest, 17° 28' S, 145° 29' E, 21 January 1977, Walford Huggins (1 ANIC, 3 ANIC); Maalan Road , 1.5 km S Palmerston Highway, rainforest, sieved litter, QM berlesate no. 879, elev. 750 m, 17° 36' S, 145° 42' E, 26 November 1994, G. Monteith (1 QMBA); Massey Ck. , BS3, pitfall trap A2, elev . 1000 m, 17° 37' S, 145° 34' E, 1 December 1994 – 3 January 1995, P. Zborowski (2 ANIC); Millaa Millaa Falls, 17° 30' S, 145° 37' E, 16 April 1997, Monteith & Russell (2 QMBA); Mossman Bluff Track, 5–10 km W Mossman, Site 4, flight intercept, elev . 600 m, 16° 28' S, 145° 21' E, 16–30 December 1988, Monteith, Thompson & ANZSES (1 QMBA); Mt. Bartle Frere, W side, rainforest leaf and log litter, elev . 700 m, 17° 22' S, 145° 49' E, 25 July 1982, S. & J. Peck (10 ANIC); Mt. Boolbun South , rainforest leaf litter, QM berlesate no. 896, elev. 850–1000 m, 15° 57' S, 145° 8' E, 6 November 1995, G. B. Monteith (2 QMBA); Mt. Boolbun South , rainforest leaf litter, QM berlesate no. 897, elev. 850–1000 m, 15° 57' S, 145° 8' E, 6 November 1995, G. B. Monteith (1 QMBA); Mt. Demi , 7.0 km SW of Mossman, rainforest, litter, QM berlesate no. 549, elev. 900–1000 m, 16° 30' S, 145° 19' E, 26 April 1983, G. B. Monteith & D. K. Yeates (3 QMBA); Mt. Dryander , rainforest, stick brushing, elev . 500–650 m, 20° 15' S, 148° 33' E, 24 April 1979, G. Monteith (1 QMBA); Mt. Elliott N. P., Upper North Creek , flight intercept trap, elev . 1000 m, 19° 30' S, 146° 57' E, 3–5 December 1986, Monteith, Thompson, Hamlet (1 QMBA); Mt. Lewis, 20 km SW Mossman, log and leaf litter, 16° 28' S, 145° 21' E, 10 July 1982, S. & J. Peck (24 ANIC); Mt. Lewis, barracks, via Julatten , rainforest , 1000m, sieved litter, QM berlesate no. 289, elev. 1000 m, 16° 34' S, 145° 16' E, 10 September 1981, G. Monteith & D. Cook (1 QMBA); Mt. Lewis, c. 3 km above Bushy Creek, leaf litter, 16° 37' S, 145° 21' E, 25 November 1969, J. G. Brooks (8 ANIC); Mt. Lewis , rainforest, berlesate 491, elev . 970 m, 16° 33' S, 145° 13' E, 8 September 1975, R . W. Taylor (49 ANIC); Mt. Lewis , rainforest, berlesate 542, elev . 960 m, 16° 35' S, 145° 17' E, 30 October 1976, R . W. Taylor & T . A. Weir (92 ANIC); Mt. Lewis , rainforest, berlesate 543, elev . 960 m, 16° 35' S, 145° 17' E, 30 October 1976, R . W. Taylor & T . A. Weir (78 ANIC); Mt. Lewis Road, Julatten, 16° 37' S, 145° 21' E, 1 December 1975, A. Walford Huggins (1 ANIC); Mt. Mee , Upper Neurum , rainforest, sieved litter, QM berlesate 206, 27° 5' S, 152° 41' E, 3 September 1979, G. B. Monteith (1 QMBA); Mt. Mee, Upper Neurum , rainforest, sieved litter, QM berlesate 205, 27° 5' S, 152° 41' E, 3 September 1979, G. B. Monteith (10 QMBA); Mt. Williams , rainforest, elev . 1000 m, 16° 55' S, 145° 40' E, 3 December 1993, G. Monteith & H. Janetzki (3 QMBA); Nob Creek , Byfield, rainforest, sieved litter, QM berlesate 72, 22° 52' S, 150° 37' E, 27 April 1979, G. Monteith (3 QMBA); North Bell Peak , via Gordonvale, rainforest, sieved litter and moss, QM berlesate no. 300, elev. 900–1000 m, 17° 5' S, 145° 53' E, 16 September 1981, G. Monteith & D. Cook (1 QMBA); Paluma Dam Road, Paluma , rainforest log and leaf litter, elev . 850 m, 19° 0' S, 146° 12' E, 6 August 1982, S. & J. Peck (31 ANIC); Saddle between Massey and Belender Ker Ranges, rainforest, sieved litter, QM berlesate no. 576, elev. 950 m, 17° 16' S, 145° 50' E, 2 May 1983, G. Monteith & D. Cook (2 QMBA); Upper Mulgrave River , rainforest; ANIC berlesate 316, elev. 75 m, 17° 15' S, 145° 46' E, 19 June 1971, Taylor Feehan (1 ANIC); Windsor Tableland , 35 km NNW Mt. Carbine, rainforest, sieved litter, QM berlesate no. 403, elev. 1050 m, 19° 10' S, 146° 23' E, 25 April 1982, G. Monteith & G. Thompson (1 QMBA); Windsor Tableland , 35 km NNW Mt. Carbine, rainforest, sieved litter, QM berlesate no. 404, elev. 1050 m, 19° 10' S, 146° 23' E, 25 April 1982, G. Monteith & G. Thompson (1 QMBA); Windsor Tableland , 35 km NNW Mt. Carbine, rainforest, sieved litter, QM berlesate no. 405, elev. 1050 m, 19° 10' S, 146° 23' E, 25 April 1982, G. Monteith & G. Thompson (2 QMBA); 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 (1 QPIM) ; Victoria, Cann River , at crossing of WB Line , littery sand and gravel at edge of small river; dry sclerophyll forest, elev. 215 m, 37° 20' S, 149° 12' E, 10 April 2000, N. Porch (30) (1 ANIC) .