Hydraena luminicollis Published 2007, new species
Creators: name: PERKINS, PHILIP D.
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Hydraenidae
Hydraena
Hydraena luminicollis

description: <i>Hydraena luminicollis</i> new species (Figs. 48, 55, 259) <b>Type Material.</b> Holotype (male): <b>Queensland</b>, Lamington N. P., stream at head of Moran's Falls, ex. decaying leaves on bedrock at stream margin, 28° 14' S, 153° 8' E, 2 January 1998, P. D. Perkins. Deposited in the QMBA. <b>Paratypes</b> (189): <b>New South Wales</b>, Dorrigo N. P., Callicoma Falls, wet leaves and flood debris, elev. 750 m, 30° 20' S, 152° 24' E, 5 March 1980, A. Newton &amp; M. Thayer (1 USNM); Wiangaree SF, Brindle Creek, wet leaves and flood debris, subtrop. forest, elev. 740 m, 28° 22' S, 153° 0' E, 29 February–3 March 1980, A. Newton &amp; M. Thayer (182 USNM); Wiangaree SF, Isaksson Ridge, berl. forest leaf &amp; log litter, N. moorei rainfor., elev. 1050 m, 28° 22' S, 153° 0' E, 29 February–3 March 1980, A. Newton &amp; M. Thayer (6 USNM); <b>Queensland</b>, 40 km SSE Brisbane, Mt. Tambourine N. P., Cedar Creek, 27° 55' S, 153° 11' E, 22 August 2004, M. A. Jäch (AU 4) (11 NMW); 90 km SW Brisbane, 40 km NE Warwick, 28° 3' S, 152° 22' E, 26 August 2004, M. A. Jäch (AU 17) (1 NMW); Bunya Mtns. N. P., Barker Creek, downstream of Little Falls, ex decaying leaves, drift, 26° 52' S, 151° 35' E, 3 February 1998, P. D. Perkins (1 MCZ); Bunya Mts., 26° 51' S, 151° 34' E, 16 October 1973, Neboiss (1 ANIC); Lamington N. P., Moran's Creek, 80 km S Brisbane, elev. 760–820 m, 28° 14' S, 153° 8' E, 24 August 2004, M. A. Jäch (AU 9) (18 NMW); Lamington N. P., stream at head of Moran's Falls, ex. decaying leaves on bedrock at stream margin, 28° 14' S, 153° 8' E, 2 January 1998, P. D. Perkins (7 MCZ); Natural Bridge N. P., Cave Creek, ex. bare rocks in splash zone, 28° 14' S, 153° 15' E, 31 January 1998, P. D. Perkins (1 MCZ). <b>Differential Diagnosis.</b> Similar to <i>H</i>. <i>antaria</i> and <i>H</i>. <i>spinissima</i> in body size, dorsal punctation, and general coloration; differing from both by the wider and completely testaceous pronotum (Figs. 45, 47, 48); additionally differing from <i>H</i>. <i>antaria</i> by the shorter, non-carinate plaques, and from <i>H</i>. <i>spinissima</i> by the pronotal shape and more convex elytra. Based on aedeagal similarities, <i>H</i>. <i>luminicollis</i> is clearly more closely related to <i>H</i>. <i>antaria</i> than to <i>H</i>. <i>spinissima</i> (Figs. 52, 53, 55). <b>Description.</b> Size (length/width, mm) holotype: body (length to elytral apices) 1.59/0.68; head 0.27/ 0.38; pronotum 0.42/0.53, PA 0.42, PB 0.46; elytra 0.94/0.68. Head dark brown to piceous, lateral areas of frons lighter; labrum and mentum testaceous; pronotum testaceous; elytra mostly dark brown, shoulders and posterior 1/2 light brown to testaceous; legs and palpi testaceous, tip of palpi not darker. Frons punctures ca. 1xef; interstices shining, 3–5xpd. Clypeus microreticulate laterally, finely sparsely punctate medially. Mentum shining, very finely sparsely punctate; postmentum microreticulate. Genae raised, lacking posterior ridge. Pronotal punctures on disc slightly larger than those of frons, interstices shining, anteriorly and posteriorly 1–2xpd, on disc 2–4xpd; PF1 and PF4 absent; PF2 moderately deep; PF3 moderately deep, broad. Elytral punctures slightly smaller than largest pronotal punctures. Intervals not raised, shining, width about 2xpd, as are interstices between punctures of a row. Apices in dorsal aspect conjointly rounded, in posterior aspect margins form very weak angle with one another. Ratios of P2 width and plaque shape (P2/w/l/s) ca. 2/2/5/6. P1 laminate; median carina angulate in profile. P2 narrow, l/w ca. 5/2, sides parallel, apex blunt. Plaques parallel or nearly so, slightly raised, located in posterior 1/2 of metaventrite on sides of deep median depression. AIS flat, width at arcuate posterior margin 3x P2. Protibia gradually widened to about distal 1/4, then markedly excavate, a prominent spine at base of excavation; mesotibia slender; metatibia slender, weakly emarginate and flattened on medial margin for most of length, small tuft of setae at apex. Last tergite with circular concavity. Aedeagus (Fig. 55) main-piece very wide in lateral view, distally with large process on right side joined to median enlargement that broadly abuts lobe of distal piece; distal piece left side (ventral view) with two or three rounded lobes and one curving process; left paramere narrowed apically, setae apically and along distal 1/2 of ventral margin, and second group of very short setae on dorsal margin; right paramere deeply bifid, setae in three groups. Female last tergite with apicomedian incision delimiting two lobes, setae slender, tapering. <b>Etymology.</b> Named in reference to the bright pronotum. <b>Distribution.</b> Currently known from northern New South Wales and southernmost Queensland (Fig. 259).
description: Published as part of <i>PERKINS, PHILIP D., 2007, A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae), pp. 1-207 in Zootaxa 1489 (1)</i> on pages 38-39, DOI: 10.11646/zootaxa.1489.1.1, http://zenodo.org/record/5087337