New species (130) of the hyperdiverse aquatic beetle genus Hydraena Kugelann from Papua New Guinea, and a preliminary analysis of areas of endemism (Coleoptera: Hydraenidae) 2944
Perkins, Philip D.
Zootaxa
2011
2011-07-08
2944
1
1
417
3N3FG
Perkins, 2011
Perkins
2011
[151,389,1591,1617]
Insecta
Hydraenidae
Hydraena
Animalia
Coleoptera
30
31
Arthropoda
species
phainops
sp. nov.
( Figs. 31, 33, 296–297, 322–323, 390, 445)
Type Material. Holotype(male): Morobe Province: Lae–Buloloroad, Patep Creek, ex gravel bank of large fast river, [GE est.] 900–1100 m, 6° 52' S, 146° 37' E, 28 xii 1964, M. E. Bacchus(MEB 126) ( NHM). Paratypes(186): Central Province:nr. Port Moresby, Sogeri Plateau, Musgrave River, ex dead leaves caught among rocks, [GE est.] 100–200 m, 9° 46' S, 147° 41' E, 16 iii 1965, M. E. Bacchus(MEB 200b) (6 NHM); Port Moresby– Brown Riverroad, ex gravel banks of large slow muddy river, [GE est.] 50–100 m, 9° 24' S, 147° 14' E, 15 iii 1965, M. E. Bacchus(MEB 198) (3 NHM); Port Moresby– Brown Riverroad, ex gravel banks of small fast running stream, [GE est.] 50–100 m, 9° 24' S, 147° 14' E, 15 iii 1965, M. E. Bacchus(MEB 199a) (1 NHM); East Sepik Province: Prince Alexander Mts., Wewak–Maprik, 100 m, 3° 43.013' S, 143° 37.665' E, 21 iv 2006, Balke( PNG47) (5 ZSM); Madang Province: Finisterre Mts., Naho River Valley, Damanti, ex gravel banks of small fast river, 1082 m, 5° 55' S, 145° 58' E, 8 x 1964, M. E. Bacchus(MEB 37) (2 NHM); Highwaynear Madang, ford, 80 m, 5° 24.405' S, 145° 38.213' E, 26 xi–3 xii 2006, Binatang Boys( PNG117) (8 MCZ, NHM, NMW, PNG, ZSM); Keki, Adelbert Mts., 400 m, 4° 43.058' S, 145° 24.437' E, 29 xi 2006, Binatang Boys( PNG119) (3 ZSM); Keki–Sewan, Adelbert Mts., 300 m, 4° 40.558' S, 145° 27.187' E, 30 xi 2006, Binatang Boys( PNG121) (19 MCZ, NHM, NMW, PNG, ZSM); Sepik Ramu Basin, Kojé Creek, unshaded creek, small to medium cobbles, gravel and fine sand (the latter in areas of slack water), filamentous algae on stony substrates, small accumulations of leaf litter, 160 m, 5° 33' S, 145° 23' E, 1 vii–30 viii 1988, D. Dudgeon(7 NMW); Morobe Province: 5 milesW of Lae, Buins Creek, ex sand and gravel banks of clear fast river, [GE est.] 10–40 m, 6° 43' S, 147° 2' E, 28 xii 1965, M. E. Bacchus(MEB 121) (68 NHM); c. 3 m. Lae–Busuroad, ex gravel banks of small swift river, [GE est.] 50–70 m, 6° 41' S, 147° 0' E, 21 i 1965, M. E. Bacchus(MEB 155a) (14 NHM); c. 7 mi.Lae– Buloloroad, ex gravel and grass roots on bank of small stream, [GE est.] 10–30 m, 6° 41' S, 146° 54' E, 30 xii 1964, M. E. Bacchus(MEB 120) (8 NHM); Huon Pen., road to Kwapsanek, 250 m, 6° 30.27' S, 146° 59.581' E, 31 iii 2006, Balke& Sagata( PNG24) (7 MCZ, NHM, NMW, PNG, ZSM); Kassam Pass, Sing Sing Creek, [GE est.] 1300–1500 m, 6° 12' S, 146° 1' E, 14 vi 1979, W. G. Ullrich(5 MHNG); Kassam Pass, Yung Creek, [GE est.] 1300–1500 m, 6° 12' S, 146° 0' E, 14 vi 1979, W. G. Ullrich(2 MHNG); Lae–Buloloroad, ex mud and muddy gravel by small shaded creek, [GE est.] 900–1100 m, 6° 50' S, 146° 37' E, 30 xii 1964, M. E. Bacchus(MEB 135) (1 NHM); Lae–Buloloroad, ex stones and gravel bank of large river, [GE est.] 900–1100 m, 6° 52' S, 146° 37' E, 28 xii 1964, M. E. Bacchus(MEB 124) (1 NHM); Lae– Buloloroad, Patep Creek, ex gravel bank of large fast river, [GE est.] 900–1100 m, 6° 52' S, 146° 37' E, 28 xii 1964, M. E. Bacchus(MEB 126) (4 NHM); Lae–Buloloroad, Peracles Creek, ex gravel banks of small steam, [GE est.] 900–1100 m, 6° 50' S, 146° 37' E, 30 xii 1964, M. E. Bacchus(MEB 132) (3 NHM); Lae, Umg.[=environs of] Oomsis, Buang River, [GE est.] 20–30 m, 6° 53' S, 146° 57' E, 14 vi 1979, W. G. Ullrich(17 MHNG); same locality, 15 vii 1979, W. G. Ullrich(1 MHNG); Markham Valley, Lae–Kainanturoad, Erap River, ex gravel, [GE est.] 80–130 m, 6° 37' S, 146° 42' E, 26 i 1965, M. E. Bacchus(MEB 156) (1 NHM).
Differential Diagnosis.Differentiated from other PNGmembers of the genus by the combination of the very small size (ca. 1.25 mm), the dark dorsum, and especially the very large metaventral plaques ( Figs. 31, 296). The aedeagus distinctly differs from that of other members of the Manuleagroup ( Fig. 33). The metaventrite, and the very complicated chaetotaxy of the tibiae are illustrated with SEMs ( Figs. 296–297, 322–323).
Description.Size: holotype(length/width, mm): body (length to elytral apices) 1.25/0.52; head 0.21/0.32; pronotum 0.29/0.38, PA 0.34, PB 0.33; elytra 0.76/0.52. Dorsum of head piceous; pronotum piceous except anterior margin slightly lighter; elytra dark brown; legs and maxillary palpi brown, tip of palpus not darker. Frons punctures ca. 1xef, slightly larger near eyes than medially; interstices shining, 1–4xpd. Clypeus microreticulate laterally, very finely sparsely punctate medially. Mentum and postmentum very sparsely very finely punctulate, shining. Genae raised, shining, without posterior ridge. Pronotum subcordiform, median 2/3 of anterior margin emarginate; punctures on disc ca. 1xpd those of frons, interstices shining, 2–5xpd, punctures slightly larger and denser at anterior and posterior; PF1 absent; PF2 very shallow, obsolete; PF3 moderately deep; PF4 absent. Elytra with posterior declivity very gradual, summit slightly past midlength; lateral explanate margins narrow; on basal 1/3 punctures ca. 1xpd largest pronotal punctures, punctures becoming gradually smaller toward posterior. Intervals not raised, shining, on disc ca. 1–3xpd, as are interstices between punctures of a row, a few punctures subserial. Apices in dorsal aspect conjointly rounded, in posterior aspect margins forming shallow angle with one another. Ratios of P2 width and plaque shape (P2/w/l/s) ca. 3/4/8/1. P1 laminate; median carina sinuate in profile. P2 raised, l/w ca. 2/1, sides converging toward blunt apex. Plaques very large, very narrowly separated, more narrowly so at posterior than at anterior, weakly raised. Metaventrite anteriorly with very low midlongitudinal ridge. AIS width at straight posterior margin ca. 1.7x P2. All legs moderately long and slender. Profemur (male) without tubercle next to trochanter; protibia very slightly arcuate, gradually increasing in width from base to apex. Meso- and metatibia straight. Abdominal apex symmetrical; last tergite (male) notched. Aedeagus as illustrated ( Fig. 33). Female tergite X, gonocoxite, and spermatheca as illustrated ( Fig. 390).
Etymology."Bright eyes"; named in reference to the large, oval and brightly shining metaventral plaques.
Distribution.A wide distribution pattern, from the western part of Area 4 to the southeastern part of Area 11, and including records in Areas 2, 3, and 5, but no records from Area 1; elevation range 10–1500 m, but with only two records above 1100 m( Fig. 445).
1964-12-28
NHM
M. E. Bacchus
1000
-6.866667
Patep Creek
1303
146.61667
Lae - Bulolo
30
31
1
Morobe
holotype
Central Province
30
31
1
Central
paratype
1965-03-16
NHM
M. E. Bacchus
150
-9.766666
Musgrave River
1299
147.68333
Sogeri Plateau
30
31
1
National Capital
paratype
1965-03-15
NHM
M. E. Bacchus
75
-9.4
Brown River
1300
147.23334
30
31
1
National Capital
paratype
1965-03-15
NHM
M. E. Bacchus
75
-9.4
Brown River
1300
147.23334
30
31
1
National Capital
paratype
2006-04-21
ZSM
Balke
Papua New Guinea
100
-3.7168834
Wewak - Maprik
1
143.62775
Prince Alexander Mts.
30
31
1
East Sepik
paratype
[307,1431,1986,2011]
Damanti
Papua New Guinea
Naho River Valley
Finisterre Mts.
30
31
1
Madang Province
paratype
[151,997,151,175]
1964-10-08
NHM
Bacchus
1082
-5.9166665
1305
145.96666
31
32
1
[1008,1329,151,175]
Highway
31
32
1
Madang
2006-11-26
2006-12-03
2006-11-26
MCZ, NHM, NMW, ZSM
Binatang Boys
Papua New Guinea
80
-5.40675
Adelbert Mts
1
145.63689
Keki
31
32
1
[320,1274,223,248]
2006-11-29
ZSM
Binatang Boys
Papua New Guinea
400
-4.7176332
PNG
1
145.40729
31
32
1
Adelbert Mts
Papua New Guinea
Keki
31
32
1
2006-11-30
MCZ, NHM, NMW, ZSM
Binatang Boys
Papua New Guinea
300
-4.6759667
Koje Creek
1
145.45311
Ramu Basin
31
32
1
West Sepik
1988-07-01
1988-08-30
1988-07-01
NMW
Dudgeon
Papua New Guinea
160
-5.55
1305
145.38333
31
32
1
West Sepik
Papua New Guinea
Buins Creek
31
32
1
Morobe
1965-12-28
NHM
Bacchus
Papua New Guinea
25
-6.7166667
1304
147.03334
31
32
1
Morobe
[452,1216,439,463]
Papua New Guinea
3
Lae - Busu
31
32
3
Morobe
1965-01-21
NHM
Bacchus
Papua New Guinea
60
-6.6833334
1304
147.0
31
32
1
Morobe
Papua New Guinea
Bulolo
31
32
1
Morobe
[513,1432,511,535]
1964-12-30
NHM
Bacchus
Papua New Guinea
20
-6.6833334
1304
146.9
31
32
1
Morobe
[151,500,548,572]
Kwapsanek
Papua New Guinea
Huon Pen.
31
32
1
Morobe
2006-03-31
MCZ, NHM, NMW, ZSM
Balke & Sagata
Papua New Guinea
250
-6.5045
Sing Sing Creek
9
146.99301
Kassam Pass
31
32
1
1979-06-14
MHNG
Ullrich
Papua New Guinea
1400
-6.2
1305
146.01666
31
32
1
[444,850,620,644]
Papua New Guinea
Yung Creek
Kassam Pass
31
32
1
1979-06-14
MHNG
Ullrich
Papua New Guinea
1400
-6.2
1305
146.0
31
32
1
[378,1249,655,679]
Papua New Guinea
Lae - Bulolo
31
32
1
1964-12-30
NHM
Bacchus
Papua New Guinea
1000
-6.8333335
1303
146.61667
31
32
1
Papua New Guinea
Lae - Bulolo
31
32
1
[394,1367,727,751]
1964-12-28
NHM
Bacchus
Papua New Guinea
1000
-6.866667
1303
146.61667
31
32
1
Papua New Guinea
Patep Creek
Lae - Bulolo
31
32
1
1964-12-28
NHM
Bacchus
Papua New Guinea
1000
-6.866667
1303
146.61667
31
32
1
Papua New Guinea
Peracles Creek
Lae - Bulolo
31
32
1
[205,1140,836,860]
1964-12-30
NHM
Bacchus
Papua New Guinea
1000
-6.8333335
1303
146.61667
31
32
1
Oomsis
Papua New Guinea
Lae
Buang River
Umg.
31
32
1
[515,1296,871,895]
1979-06-14
MHNG
Ullrich
Papua New Guinea
25
-6.883333
1303
146.95
31
32
1
1979-07-15
MHNG
W. G. Ullrich
Papua New Guinea
25
-6.883333
1303
146.95
31
32
1
[641,1436,908,932]
Papua New Guinea
Markham Valley
Erap River
Lae - Kainantu
31
32
1
[151,1046,943,967]
1965-01-26
NHM
Bacchus
Papua New Guinea
105
-6.616667
1304
146.7
31
32
1