Riethia cinctipes Freeman 1961
Riethia Pe
Riethia (Kieffer 1917) (Diptera: Chironomidae) revised for the Austro-Pacific region
Cranston, Peter S.
Zootaxa
2019
2019-07-25
4646
3
461
500
4T32L
Freeman
Freeman
[151,472,1003,1030]
Insecta
Chironomidae
Riethia
Animalia
Diptera
6
467
Arthropoda
species
cinctipes
( Figs. 2B, 3E, 3J, 4I, 5A, E, 6E)
Riethia cinctipes Freeman 1961; Cranston 1966, 2000. RiethiaPe‘Brisbane’ Cranston 1966, 2000
Type material. Paratypes, ♂, pinned, separate hypopygium on celluloid mount, ‘ F.C.T. Blundells’[ AUSTRALIA, Australian Capital Territory, Blundell’s Farm] 18.2.1931, A.L.Tonnoir[ANIC]. Riethia cinctipesFreemandet. Freeman1960 (2 labels); ♀, pinned, ‘ Stanwell Pk’[ New South Wales], 2 Mar 23[1923]; second label as ♂above. Other material(collected Cranston, deposited ANIC, unless otherwise stated): Queensland, 2♂♂, 1 ♀, McIlwraith Range, 15 kmWNW Bald Hill, 13°43’S 143°19’E, 27.vi.–12.vii.1989( Naumann, ANIC expedition); 1 ♂, 7 milesN. Hope Vale Mission, 4.x.1980(at light) ( Colless) #2542; 5 Pe, Emmagen Ck., 16°02.7”S 145°27.0”E, 9/ 10.ix.1997( McKie) #2068; 2Pe, Mason Ck., 16°05.08”S 145°27.36”E, 23.iv.1999; 3 Pe, Oliver Ck.,16°08.3”S 145°26.7”E, 9/ 10.ix.1997( McKie) #2073,4, 7 Pe, 23.–23.iv.1999; L, 6Pe, Mossman, Rex Ck., 16°28’S 145°19’E, 5–6.iv.1997, #2543, 5; 6 Pe, same except 27–28.viii.1997, #2546; 6 Pe, same except 17–18.xii.1997, #2544; 2L, Le/P ♂, Pe, 19–20.x.1998( Cranston& Dimitriadis) #2076-8; 10 Pe, Mt. Lewis, trib. Churchill Ck., 16°34’S 145°20’E, 6–7.iv.1997, #2547-8; 3 Pe, Clohesy R., 7–8.ix.1997( McKie) #2067; 5Pe, Mareeba, Davies Ck., above falls, 17°01’S 145°35’E, 11–12.iv.1997#2549; 2 Pe, same except 19–20.vi.1997; Pe, same except 27–28.viii.1997, # 2065-66; 2 Pesame except 17–18.xii.1997, #2066; 2 Pe, Kauri Ck., 11.vi.1997( McKie) #2069; 2 Pe, Mt. Haig,?U. Emerald Ck., 17°06’24”S 145°36’52”E, 17–18.xii.1997, #2550; Pe, Tinaroo, unnamed Ck., 17°09’S 145°37’E, 11– 12.vi.1997( McKie) #2075; 4Pe, Bartle Frere, Junction Ck., 17°16’S 145°55’E, 1–4.iv.1997, #2553; Pe, same except 27–28.viii.1997, #2551; 5 Pe, same except 17–18.xii.1997,, #2552; 2Pe, Herberton, Carrington Falls Ck., 17°20’S 145°27’E, 9–10.iv.1997, #2554; Pe, Nigger Ck., 17°27’S 145°29’E, #2555; P ♂, 8 Pe, Palmerston N.P., Learmouth Ck., 17°35’S 145°42’E, #2062, -2556; Tchooratippa Ck., 17°37’S 145°45’E, 8–9.iv.1997, #2557; 2 Pe, Python Ck., 17°46.2’S 145°35.4’E, 2–3.xi.1997( McKie) #2072; Pixies Ck., 2–3.ix.1997, 17°47’S 145°41’E( McKie), #2070-1; Le/ Pe/ ♂, 2 Le/ Pe/ ♀, nr Cardwell, 5-mile Ck., 17.xii.1997, 18°19’S 146°02.55’E, #2064; L, same except 17.xiii.1997; Le/ Pe/ ♀, Paluma, Birthday Ck., 18°58’S 146°09’E, 24.x.1998( McKie); 3 Pe, Paluma, unnamed Ck. S. Paluma, 25–26.iii.1998, #2558; Le/ Pe/ ♀, Paluma, Camp Ck., 18°68’S 146°09’E, 5.v.1999( Dimitriadis); Le/P ♂, Yaccobine Ck., 17.v.1988( Edward), #2061; 2Pe, N.W. Brisbane, Bundaroo Ck., 26°42’S 152°34’E, 27.ix.1989, #2559. New South Wales: 5 Pe, Chaelundi N.P., Chandlers Ck., 30°02.22’S 152°29.26’E, 11.iv.1996, #2560; 9 Pe, nr Dorrigo, Eve Ck., 30°16’S 152°50’E, 9.x.1996, #2056; 2 Pe, Barren Ground N.P., Redback Stream, 34°40’S 150°44’E, 9.iv.1994, #2055; Pe, Endrick R., 6 kmNE Nerriga, 35°05’S 150°08’E, 1.ix.1988, #2053; Pe/ ♂, Rutherford Ck., 11.xi.1961( Brundin) ( ZSM). Australian Capital Territory( ACT): Pe, Brindabellas, Lees Ck., 35°22’S 148°50’E, 12–13.i.1998( Willis& Cranston) #2058; same except 24.i.1998( Willis) #2057. Northern Territory: 4 ♂, Pe, Kakadu N.P., Radon Spring, 12°45’S 132°55’E, 13–14.iv.1989, #2051; 2Pe, Litchfield N.P., Wongi Falls, 13°10’S 130°41’E, 6.viii.1990, #2054. Victoria: L., nr Anglesea, Angahook Forest, AV#82.1, 19.iii.1972( Martin). Molecular ( MV) larvae. Queensland, 2L, Emerald Ck., 16°58.50’S 145°34.00’E, 8.ix. 2007, 360 m a.s.l. ( Krosch) ( MV FNQDE1R, DE1.24); L, Atherton, Nigger Ck., 17°26’S 145°28’E, 1.ix.2005( Krosch) ( MVN7); 2L, Paluma, Birthday Ck., 18°58.35’S 146°09.26’E, 24.ix. 2008, 700 m a.s.l. ( Krosch) ( MV FNQBC8R1-2); L, Paluma, Little Birthday Ck./ Camp Ck., 18°58’22”S 146°09’52”E, 850 ma.s.l., 21.ix.2008( Krosch) ( MV FNQC- C4R1); L( 3i) same except 22.ix.2008( MV FNQBC7R1), L, same except 21.ix.2008( MV PAa2, 15); 2L, Cloudy Ck., 18°59.50’S 146°12.30’E, 25.ix. 2008, 720 m a.s.l. ( Krosch) ( MV FNQCCR1, 2,3);. 3L, Cooloola N.P., Frankis Gulch, 26°02.50’S 153°04.44’E, 18.iv.2009( Krosch) ( MV AU09FG3, 4, 10). Northern Territory, 4L, Kakadu N.P., Burdulba Ck., 5.i.2007(Hanley et al.) ( MV NT11B1R1-4, all 3i) [possibly unknown larva of R. kakadu].
Description. Male.Thorax yellow, with distinct brown vittae (dark area may be restricted to anterior of median vitta and lateral edges of lateral vittae) and transverse pleural stripe. Legs with dark band on mid-femur, femoral apex, base, mid and apex of all tibia, apices of all tarsomeres ( 5th maybe all dark). Wing membrane infuscate, with transverse dark patch including both ‘forks’. Abdomen with posterior third of tergite II with dark transverse band; all succeeding segments with dark postero-lateral areas, genitalia brown. Setae of TIX long, slender, arranged in two clusters, separated medially by non-setose strip. Gonostylus relatively short, not tapered at gonocoxite junction, bearing essentially simple setae, some with fine branches, all distally pointed. Superior volsella ( Fig. 2B) without microtrichia in basal or medial area, proximo-laterally with 4–6 long setae, without posterior projection, medially-directed lobe-shaped digitus without microtrichia, with 7–12 simple seta, ending in narrowed lobe or notched; inferior volsella small, mainly appressed to inner contour of gonocoxite and linked to superior volsella, without pectinate scales, with long simple setae and dense microtrichiae extending from distal area linking to superior volsella. Pseudovolsella no more than weak bulge with strong setae not differentiated from linearly aligned on inner gonocoxite ( Fig. 2B). Mensural features as in Table 1. Female(n=3, part teneral). Colour similar to male, yellow with median vitta anteriorly brown oval, lateral vittae pale brown with darker outline anteriorly and laterally, extending from mid-scutum to just anterior to pale scutellum; central postnotum brown. anepisternum with broad brown linear ‘smear’. Wing with infuscate band over cross-veins, paler apically and at base. Legs with transverse band at 2/3 on forefemora, dark brown at distal apices of femora and proximal base of tibia (‘knees’); tibial apices darkened near spurs; apices of tarsomeres brown; foreleg with darkest pigment, mid and hind legs less intense. B.l. 6.0 mm, W.l. 2.5 mm. Antenna flagellomeres 140–180, 105–115, 100–105, 95–100, 140–165; AR 0.32–0.34. 38–40 clyp, 16 multiserial orbitals. Palpomeres 50, 50–55, 170–300, 180–280, 260–360. Thorax. Ac?7–9, Dc 14, Pa 2–3, Scts 14–15. Wing V.R. 1.12. Vein setation: R 28–37, R 124–34, R 4+558–67; sq. 11–19. Leg lengths: P 11400, 1440, 1440, 800, 640, 480, 220; P 21560, 1380, 780, 440, 320, 200, 110; P 31400, 1380, 940, 600, 420, 240, 120. Ratios: LR 11.01, LR 20.56, LR 30.68;, BV 12.04, BV 23.4, BV 32.7; SV 11.97, SV 23.77, SV 32.96. Foretibial comb, 50 with 5–6 lateral teeth each side; midtibials 65, 75, rear 65, 70, with strongly developed lateral teeth. Pupa. Brown with dark dorsal thorax, anterior wing sheaths and lateral apophyses on all abdominal segments; comb brown-black. Cephalothorax with strong frontal warts, thorax rugose with multiserial rows of dark tubercles on dorsum. Hook row on II continuous [one exception, see remarks], occupying c 50% of tergite width. Conjunctival spinule bands on III–V narrowly separated to almost completely contiguous with posterior tergal armament, on V narrower and maybe medially sparse. Pedes spurii B absent, vortex strong.Abdomen ( Fig. 3E): Tergite II with triangular area of spinules anterior to and narrower than hookrow, without any more anterior spinules, TIII–V largely infilled with spinules, TVI with anterior-median oval area, separated from posterior transverse band; TVII and VIII with anterior and posterior areas of fine spinules. Comb ( Fig. 3J, 4I) variable, often with “windows” of pale cuticle within, with 1 strong, inner spine directed postero-medially and 3–4 subordinate spines. Larva. Head capsule yellow including postmentum and genae, with dark occipital margin, mandible golden yellow, bases of inner 4 mandibular teeth and mental teeth golden-brown. Clypeus lozenge-shaped, elongate-ovoid, 3× as wide as long ( Fig. 5A, 6E). Antenna ( Fig. 5E) with 3 rdsegment longer than 2 nd, characteristically narrowed basally and with thin wall on one side; segment 4 <2/3rds length of segment 2 (14–18μ to 21–25μ). Ventromental plate variable, with specimens from Cloudy Ck 20% longer than mentum width, with all others close to 100%. Mensural features as in Table 2. Diagnosis.Adults of R. cinctipeshave distinctively ‘banded’ legs and pigmented wings, but both vary in intensity perhaps associated with tenerality. Amongst the males of the 5 taxa with patterned-legs, geographic distribution and male genitalia provide discriminatory features. Riethia cinctipesis an eastern Australian species as is R. stictoptera, the others are from Western Australia or New Caledonia. The characteristic gonostylus of R. stictopteradiffers from the conventional one of R. cinctipes. The digitiform appendage of the superior volsella, absent in R. stictoptera, differs in each of the other banded-leg species, see key and Figures 2B, 2C, 2G. Specifically, the medially-directed digitus has a notch or apical tooth on the anterior margin in R. cinctipeswhereas the digitus tapers evenly to a point in R. donedwardi. The pupa of R. cinctipesalso resembles that of R. stictopterawith undivided hookrow and only conjunctives III and IV with continuous rows of spinules and with sparse spinules on the posterior of TII. The pupa of R. cinctipeslacks pedes spurii B and tergite II has a moderate-sized spinule area, about as wide as the hook row, in contrast to a smaller spinulose area in R. stictoptera.Some southern exuviae and those from N.T. have the conjunctival bands more distinctly separated from the tergal spinulation. None of these are reared, and for the present they are treated as variants of R. cinctipes. Larvae of R. cinctipeshave a low AR (<1.2) as does R. donedwardi, but the mentum and inner mandibular teeth are brown compared to the yellow-gold teeth in R. donedwardiwhich is a species restricted to Western Australia. The 3 rdantennal segment is much longer than the 2 ndbut is subequal in R. donedwardiand also is narrowed, seemingly thinner-walled, medially ( Fig. 5E). Further differentiation comes from the lozenge-shaped (elongate-ovoid) clypeus, 3× as wide as long. Remarks.There is substantial variation in the setosity of the male thorax. For example, a reared male from 5- mile Creek has multiple rows of dorsocentrals, but unreared males from further north in Queenslandhave fewer near uniserially arranged. The ventromental plate with respect to the width of the mentum falls in to two classes: close to equal (ratio=1.0) or greater (ratio = 1.2 for same width of mentum). This partially conforms to variation seen in molecular barcode patterns—unfortunately only 1 specimenproduced 4 genes. DIstribution and ecology. R. cinctipesis an eastern Australian species with a range extending from 13°S- 14°Sin Kakadu and Litchfield National Parks, Northern Territoryand north Queensland, southwards to an isolated record from south coastal Victoria. Most reports are from the north to central parts of this range, with no specimens from Tasmania. Most sites are from running waters, but this habitat is over-represented due to use of drift nets in lotic conditions. Larvae do occur in billabongs and standing waters in rivers, usually with good to excellent water quality.
2423807405
1931-02-18
F.C.T. Blundells' & A.L.Tonnoir
Australia
Freeman
6
467
1
1
Australian Capital Territory
paratype
2423807430
[389,1092,1266,1293]
1923-03-02
Australia
6
467
1
1
New South Wales
2423807480
[1104,1383,1266,1293]
Australia
6
467
1
1
New South Wales
2423807445
[199,1093,1302,1329]
6
467
2423807464
1989-06-27
-13.716666
143.31667
6
467
3
1
2
Queensland
2423807581
1980-10-04
6
467
1
1
Queensland
2423807444
1997-09-10
Emmagen Ck.
6
467
Queensland
2423807679
[493,1119,1409,1436]
1999-04-23
6
467
Queensland
2423807569
1999-04-23
Oliver Ck. & McKie
6
467
Queensland
2423807671
1997-04-05
-16.466667
145.31667
6
467
Queensland
2423807407
[420,899,1480,1508]
1997-08-27
6
467
Queensland
2423807615
[913,1384,1480,1508]
1997-12-17
6
467
Queensland
2423807505
1998-10-19
Pe & Cranston & Dimitriadis
6
467
1
1
Queensland
2423807389
1997-04-06
Pe & Churchill Ck.
-16.566668
145.33333
6
467
Queensland
2423807477
[531,1046,1553,1579]
1997-09-07
Clohesy R. & McKie
6
467
Queensland
2423807443
1997-04-11
-17.016666
145.58333
6
467
Queensland
2423807564
[686,1053,1588,1615]
1997-06-19
6
467
Queensland
2423807412
1997-08-27
6
467
Queensland
2423807508
[274,726,1624,1651]
1997-12-17
6
467
Queensland
2423807547
[738,1213,1624,1651]
1997-06-11
Kauri Ck. & McKie
6
467
Queensland
2423807544
1997-12-17
Pe & Emerald Ck.
-17.106667
145.61446
6
467
Queensland
2423807456
1997-06-11
Pe & Tinaroo & Ck.
-17.15
145.61667
6
467
Queensland
2423807488
[461,1247,1695,1722]
1997-04-01
-17.266666
145.91667
6
467
Queensland
2423807591
1997-08-27
6
467
Queensland
2423807578
[428,903,1730,1758]
1997-12-17
6
467
Queensland
2423807557
1997-04-09
-17.333334
145.45
6
467
Queensland
2423807415
[520,998,1766,1794]
Pe & Nigger Ck.
-17.45
145.48334
6
467
Queensland
2423807572
Pe & Palmerston N.P. & Learmouth Ck.
-17.583334
145.7
6
467
1
1
Queensland
2423807592
[589,1237,1802,1829]
1997-04-08
-17.616667
145.75
6
467
Queensland
2423807563
1997-11-02
Pe & Python Ck.
-17.77
145.59
6
467
Queensland
2423807459
[739,1431,1838,1865]
1997-09-02
-17.783333
145.68333
6
467
Queensland
2423807675
[151,1115,1873,1901]
1997-12-17
-18.316668
146.0425
6
467
2
1
1
Queensland
2423807408
[1124,1432,1874,1901]
6
467
Queensland
2423807447
[151,968,1909,1937]
1998-10-24
Paluma & Birthday Ck.
-18.966667
146.15
6
467
1
1
Queensland
2423807377
1998-03-25
Ck. S. Paluma
6
467
Queensland
2423807493
[414,1218,1945,1972]
1999-05-05
Le & Paluma & Camp Ck.
Pe
146.15
Dimitriadis
6
467
1
1
Queensland
2423807494
1988-05-17
Yaccobine Ck. & Edward
6
467
1
1
Queensland
2423807616
[527,1365,1981,2008]
1989-09-27
-26.7
152.56667
6
467
Queensland
2423807432
[199,1372,2017,2044]
1996-04-11
Chaelundi N.P. & Chandlers Ck.
-30.037
152.48767
6
467
New South Wales
2423807667
1996-10-09
Eve Ck.
7
468
-30.266666
152.83333
6
467
New South Wales
2423807542
1994-04-09
Barren Ground N.P.
-34.666668
150.73334
7
468
New South Wales
2423807606
1988-09-01
ZSM
Endrick R. & Rutherford Ck.
-35.083332
150.13333
7
468
1
1
New South Wales
2423807376
1998-01-12
ACT
Lees Ck. & Willis & Cranston
-35.366665
148.83333
7
468
Australian Capital Territory
2423807436
[357,781,296,323]
1998-01-24
Willis
7
468
Australian Capital Territory
2423807560
[151,1258,332,359]
1989-04-13
Pe & Kakadu N.P. & Radon Spring
-12.75
132.91667
7
468
4
4
Northern Territory
2423807562
1990-08-06
Litchfield N.P.
-13.166667
130.68333
7
468
Northern Territory
2382714496
[199,1034,405,431]
1972-03-19
Angahook Forest, AV
Angahook Forest
Anglesea
7
468
1
Victoria
2423807426
2007-09-08
MV
-16.975
145.56667
7
468
Queensland
2423807580
[582,1432,476,503]
2005-09-01
MVN
-17.433332
145.46666
7
468
Queensland
2423807448
[151,1396,512,539]
2008-09-24
MV
-18.9725
146.15433
7
468
Queensland
2423807467
2008-09-21
MV
-18.972778
146.16444
7
468
Queensland
2423807546
[244,1295,584,612]
2008-09-22
MV
7
468
Queensland
2423807479
2008-09-25
MV
-18.991667
146.205
7
468
Queensland
2423807501
2009-04-18
MV
-26.041666
153.074
7
468
Queensland
2423807638
2007-01-05
MV
7
468
Northern Territory