Ewartia roberti, Popple, Lindsay W., 2017

Popple, Lindsay W., 2017, A revision of the Ewartia oldfieldi (Distant) species complex (Hemiptera: Cicadidae: Cicadettinae) with five new species from eastern and northern Australia, Zootaxa 4263 (3), pp. 401-449: 412-422

publication ID

https://doi.org/10.11646/zootaxa.4263.3.1

publication LSID

lsid:zoobank.org:pub:389C914F-C923-47E5-8908-58E68615516A

persistent identifier

http://treatment.plazi.org/id/EF5C070C-5454-FFA5-FF1C-FB9CFC196CBD

treatment provided by

Plazi

scientific name

Ewartia roberti
status

n. sp.

Ewartia roberti  n. sp.

(Plates 1C, 1D; Figs 2View FIGURE 2 B, 7B, 8A, 9A, 10–14)

Cicadetta oldfieldi (Distant)  : Ewart, 1988: 182 –183, 191, 193, 196–197, Fig. 9View FIGURE 9 J –M, Plate 2C.

Types. Holotype: ♂ [typed] ‘ 28°59’S 151°28’E’ / ’ AUSTRALIA QLD’ / ‘ Glenlyon Dam , via’ / ‘ Texas, SEQ.’ / ’ 11–12.Mar.2004GoogleMaps  . ’ / ‘ L. & W. Popple. ’ / ‘231-0023’ / ‘QM reg. no. T207359’ (QM); Paratypes: QUEENSLAND: 1♂ Indooroopilly , Brisbane Q., 28.ii.1990  ; 2♀ Stanthorpe, 11.ii.1990, A. I. Knight; 1 M Mackellar Ra. Rd, Bungabbeee SF, 15km SE. Kyogle , NSW, 28.xii.1997, mv light, Watkins elev. 180m  ; 1♀ QLD: Mt Woowoonga ca 50mi. W. of Bundaberg via Dallarnil , 29–30.i.1972, H. Frauca  ; 1♂ NW slope of Bluff Rg. nr Biggenden QLD, 10.i.1972, H. Frauca  ; 2♂ QLD Biggenden, Bluff Range , 11.i.1971, H. Frauca, c. 1700ft  ; 1♂ same data as previous, 12.xii.1972  ; 1♂ same data as previous, 13.i.1977  ; 1♂ QLD: Biggenden, Bluff Range, South fhills, 9.xii.1972, H. Frauca  ; 2♂ same data as previous, 19–20.xii.1972, H. Frauca  ; 2♂ 1♀ QLD: Mt Walsh summit, 2200ft, Biggenden , 3.i.1972, H. Frauca  ; 1♂ Coast Ranges, 11km S. of Biggenden Q., 4.xii.1976, H. Frauca  ; 1♀ QLD: Spring Ck ca 30km S. of Bundaberg , 23.xii.1976, H. Frauca  ; 1♂ 27.33S 151.59E, Prince Henry Heights , 620m, Toowoomba Q., 19.xii.1985, I. F. B. Common (all ANIC)GoogleMaps  ; 2♂ Qld: 25.552° Sx 151.469°E, Binjour Plateau , Redvale Rd , 21.xii.1997, C. J. Burwell, open forest, 340m  ; 1♂ 1♀ SEQ: 25°42’S 151°26’E Nipping Gully, Site 6, 18– 19.xii.1998, G. Monteith, C. Gough & G. Maywald, 7532, Cicadetta oldfieldi  det. A. Ewart, 1997GoogleMaps  ; 1♂ Toowoomba , 26.x.1908, Hamlyn-Harris, Melampsalta oldfieldi    ; 1♀ Toowoomba, 1908, Hamlyn-Harris, Melampsalta oldfieldi  ; 3♂ 2♀ QLD: 26°26’ Sx 150°31’E, Barakula , 330m, 17–18.xii.2001, G.Monteith & S. Wright, M.V. light, 10311  ; 1♀ QLD: 28°03’ Sx 153°07’E ‘ Glen Witheren’ General , 26–29.xii.2001, G. Montieth, M. V. light, 10352  ; 1♂ SEQ: 24°55’ 150°59’E, Hurdle Gully , 14.8km WSW Monto, open forest, 460m, 20.xii.1997, C. J. Burwell, S. Evans  ; 1♂ 1F Gooroolba, S.E.Q., 1.xii.1952, W.W.Abell, Melampsalta oldfieldi  ; 1♂ N. of Samford , xi.1990, C. J. Burwell, Cicadetta oldfieldi  det. A. Ewart 1997 (all QM)  ; 1♂ Australia, Queensland, 4km W. of Binjour , SEQ, 24.i.2003, L. & W. Popple, mv lamp, 231-0001  ; 2♂ 1♀ Australia Queensland, 6 km west of Thane , 11.xii.2001, Hand collected, L. W. Popple, 28°09’41”S 151°57’59”E, 231-0002 to 231-0004GoogleMaps  ; 1♂ Australia Queensland, Willowvale , 5 km N. Warwick, 11.xii.2001, L. Popple, J. Moss, 231-0005  ; 1♂ Australia Queensland, 28.162S ° 151.6287°E, Thanes Creek via Warwick, L. Popple, J. Moss, 231-0004, Genitalia prep. 231-01GoogleMaps  ; 1♂ Dinmore, Ipswich , SEQ, 6.iii.1998, L. Popple, Acacia  sp., 231-0006  ; 1♂ Camp Hill, Brisbane , SEQ, 3.iii.1998, L. Popple, Acacia  sp., 231-0007  ; 1♂ Myall Park , 8km N. Glenmorgan, SEQ, 27–28.xii.2001, L. Popple, A. Strange, 231-0008  ; 1♂ Austin Rd, Crows Nest , SEQ, mv lamp, 26.xii.2001, L. Popple, A. Strange, 231-0009  ; 1♂ Highfields, via Toowoomba , SEQ, 26.xii.2001, L. Popple, A. Strange, 231-0010  ; 1♂ Lytton , SEQ, 10.xii.2000, L. Popple, S. Billington, 231-0011  ; 3♂ Carina  Heights , SEQ, 7.xi.1998, L. Popple, 231-0014-231-0016  ; 1♀ Carina  Heights , SEQ, 3.xii.1999, W. Popple, 231-0017  ; 1♂ Australia, Queensland, Carina  Heights, Brisbane , SEQ, 7–8.i.2003, L. W. Popple, Recorded L. W. Popple, 231-0018  ; 1♂ Australia, Queensland, Carina  Heights, Brisbane , SEQ, i.2003, L. W. Popple, 231-0019  ; 1♂ Australia, Queensland, Carina  Heights, Brisbane , SEQ, 21.xii.2002, R. J. Popple, 231-0020  ; 1♀ 27°18’S 152°28’E, Australia, Qld, Mount Glorious , 11.i.2004, M. Larsen, mv lamp, 231-0022GoogleMaps  ; 1♂ Australia Queensland, 28°34’S 152°49’E, Afterlee Public School, Kyogle district , rural, L. Popple, R. MacSloy, 231–0024GoogleMaps  ; 1♂ Australia Queensland, 25°22’42”S 151°07’46”E, Eidsvold, Burnett River , 28–29.xii.2004, L. W. Popple, 231-0025GoogleMaps  ; 1♂ Australia Queensland, 28.162S ° 151.6287°E, Thanes Creek via Warwick , 28.i.2005, L.Popple and R. MacSloy, 231-0027GoogleMaps  ; 1♂ Australia Queensland, 27°24’47”S 152°11’60”E, Helidon Hills, Seventeen Mile Road , 19.ii.2005, L. W. Popple, R. MacSloy, 231-0028  ; 1♂ Australia Queensland, 25°36’18”S 151°32’26”E, Mt Debatable (summit), 28.x.2005, L. W. Popple, Acacia  sp., 231-0029GoogleMaps  ; 1♂ Australia Queensland, Southwood NP, via Moonie , 5– 10.xii.2005, L. Popple, A. Ewart, 27°50’05”S 150°06’47”E, 231-0030GoogleMaps  ; 1♂ 3♀ Australia Queensland, Lake Broadwater, via Dalby , 14–15.xii.2005, L. W. Popple, mv lamp, 27°21’02”S 151°05’34”E, 231-0031 to 231-0035GoogleMaps  ; 1♂ Australia Queensland, Metroplex, Murrarie , 27°26’58”S 153°05’54”E, iii.2008, Ac. fimbriata, L. W. Popple  , 231-0036GoogleMaps  ; 1♂ Australia Queensland, Burrandoan Rd, SW of Kingaroy , 11.xii.2007, 26° 26°35’54”S 151°44’58”E, 231-0037GoogleMaps  ; 1♂ Australia QLD, Roys Rd, Beerwah (F.S. C.), 26°51’19”S 153°00’24”E, 10.xii.2007, A. flavescens, L. Popple, R. MacSloy  GoogleMaps  ; 1♂ Australia QLD, Warwick— 5 km S., parkland, Acacia  sp., 22.i.2010, L. W. Popple, 28°13’31”S 152° 01’12”E, 231-0039 (all LWP)GoogleMaps  ; 1♀ Iron Bark, Crows Nest , 6.xi.1975, [A. Ewart]  ; 2♂ 1♀ Iron Bark, Crows Nest , 22.xi.1975, [A. Ewart]  ; 2♂ Perseverance Dam , 19.x.1975, [A. Ewart]  ; 1♀ Ironbark Qld, Crows Nest , 1.xi.1977 [A. Ewart]  ; 1♂ L. Broadwater, Dalby, Qld , 12.ii.1984, [A. Ewart]  ; 3♂ 1♀ Wilkie Ck, L. Broadwater area , 21.ii.1987, A. E[wart]; 1 M Mt Nebo, SEQ, H. Horton, x.1987  ; 1♂ ‘ Rockwood’ Chinchilla, 26°55’S 150°25’E, Iron Bark Ridge , 29.i.1983GoogleMaps  ; 1♂ L. Broadwater, SW. area, on A. spectabilis  , 30km SW. Dalby, Q, 28.xi.1987, D. M. Reeves; 1♂ L. Broadwater, Acacia  , A. E[wart], ~ 30km SW Dalby , 3.xi.1990  ; 1♂ Hellhole Creek Quarry, Auburn Rd , Baracula S.F., Q, 15.xii.1997  ; 1♂ Doolandella, S. E. Qld, 7.iii.1994, [A. Ewart]; 1♂ Doolandella, S. E. Qld, 18–19.xii.1995, [A. Ewart]; 3♂ L. Broadwater, E.P., SEQ., Bush Camp Entrance, A. E[wart], I. R[attray]; 3.i.2000, 27°19.89’S 151°05.76’E; 1♂ L. Broadwater, E.P., SEQ., Bush Camp Entrance, A. E[wart], I. R[attray]; 3.i.2000, 27°19,89’S 151°05.76’E, Recorded; 1♂ Binjour Plateau , 17 km NW. Gayndah, S.E.Q. 22.xii.2000, A. E[wart], 25°31.99’S 151°30.00’E, Field recordingGoogleMaps  ; 1♂ Leslie Dam, Warwick , SEQ, 30.xi.2001, A. E[wart], 28°14.32’S 151°55.54’E, RecordedGoogleMaps  ; 1♂ Leslie Dam, Warwick , SEQ, 1.xii.2001, A. E[wart], Open woodland, 28°15.13’S 151°55.67’EGoogleMaps  ; 1♂ ‘ Allinga’ pty, N. Chinchilla SEQ. Brigalow, A. E [wart], 9.i.2002, 26°39.79’S 150°38.06’E (all AE)GoogleMaps  ; 1♀ Anstead Qld , 16.xii.1999, M. Coombs  ; 1♀ Glastonbury Qld , 31.x.1999, G. Maywald, 26°13’S 152°32’EGoogleMaps  ; 1♂ Eumundi Qld , 11.xii.2001, M. Coombs  ; 1♂ Gunalda Qld , 14.xii.2001, M. Coombs (all MC)  ; 1♂ Benarkin, Blackbutt , 7.xi.1993, R. Eastwood  ; 1♀ AU.QLD.YLC, Yarrill Ck, nr Boggabilla , 223m, 28°18.0’S 150°17.7’E, 2.i.2004, Cooley, Hill, Marshall, MouldsGoogleMaps  ; 1♂ 16 km S. of Miles , 19.xii.1987, T.A. Moulds  ; 2♀ Kinbombi Falls, near Goomeri , 19.xii.1976, M.S. & B.J. Moulds  ; 2♂ 2♀ Jimna, N. of Kilcoy , 17.xii.1979, A. Hiller  ; 1♂ Isla Gorge, 22.x.1989, R. Eastwood  ; 1♂ 2♀ Coominglah Range, 24 km N. of Monto , 6.i.1975, M.S. & B.J. Moulds  , ♂ genitalia prep C66; 1♂ St Lucia, Brisbane , 10.viii.1980, I. Gynther  ; 1♂ 1♀ Wyberba, S. of Stanthorpe, ex. Coll. Vernon Fanning, purchased 1984, no other data; 1♂ Kenmore , 26.x.1984, J. North  ; 1♂ St Lucia , 24.ix.1983, J. North  ; 1♂ St Lucia, Brisbane , 10.x. 1987, R. Van Barneveld  ; 1♂ Ashgrove, Brisbane , 5.x.1983, J.T. North  ; 4♂ Leslie Dam, Warwick , 1.i.1993, R. Eastwood  ; 1♂ [damaged], same data as previous, 7.i.1990  ; 1♂ Lake Broadwater, nr Dalby , site A, 27°21’S 151°06’E, 25.x.1986, G. and A. DanielsGoogleMaps  ; 1♂ same data as previous, 26.xii.1986GoogleMaps  ; 1♂ same data as previous, site B, 30.i.1987GoogleMaps  ; 1♂ same data as previous, 30.ii.1987GoogleMaps  ; 1♀ St Lucia , 9.xii.1983, C. E. Hagan  ; 1♂ Canningvale via Warwick , 13.i.1993, R. Eastwood  ; 1♂ same data as previous, 6.ii.1993  ; 1♀ AU.QL.LBW, nr Lake Broadwater , 27°18.846’S 151°5.962’E, 357 m, 10.i.2002, Cooley, Hill, Marshall, Cowan & MouldsGoogleMaps  ; 2♂ 1♀ foot of Blackbutt Rg., 13 km E. of Blackbutt , 26°53.34’S 152°12.88’E, 9.i.2002, Cooley, Cowan, Hill, MarshallGoogleMaps  ; 1♀ S. Gympie, 23.xi.1986, R. Eastwood; 1♂ AU.QL. SUN, Sundown N.P., E. of Texas, 28°55.184’S 151°34.9’E, 385 m, 4.i.2009, Hill, Marshall, Moulds, OwenGoogleMaps  ; 1♂ AU.QL.TXN, ~ 28 km S. of Inglewood , 28°40.369’S 151°8.958’E, 347 m, 3.i.2009, Hill, Marshall, Moulds, OwenGoogleMaps  ; 3♂ Wildash, Warwick , 14.i.1993, R. Eastwood  ; 1♂ same data as previous, 20.ii.1995  ; 1♂ same data as previous, 22.ii.1995  ; 1♂ same data as previous, 9.xii.1994  ; 1♂ Blackbutt , 21.i.1989, R. Eastwood  ; 1♂ Connolly Dam, Warwick , 10.i.1990, R. Eastwood  ; 1♂ Queensland University, St Lucia, Brisbane , 27°30’S 153°06’E, 29.ii.1998, G. DanielsGoogleMaps  ; 1♂ Capalaba, Brisbane , 8 Jan 2002, Cooley, Cowan, Hill, Marshall, Moss, Moulds; ( MSM); NEW SOUTH WALES  : 1♂ Australia, N.S.W., Oaky Hill via Legume , 1.xi.2003, L. Popple, R. MacSloy, 231-0021  ; 1♂ Australia NSW, 4 km SSE. of Stannum , 4.i.2016, SL 100704View Materials, L. W. Popple, Recorded, 29.35249°S 151.803142°E, 231-0040 (both LWP)GoogleMaps  ; 3♂ Tamworth NSW, 16.i.1992, M. Coombs, 1 M Inverell NSW, 4.ii.1995, M. Coombs (all MC)  ; 4♂ 1♀ Warrumbungle NPk, 31°29.22’S, 149°00.76’E, 420m, 16.ii.15, N. & D. EmeryGoogleMaps  ; 1♂ Whitegum Lookout, Warrumbungle NPk, 31°18.14’S, 149°02.05’E, 680 m, 12.i.14, C. & D. EmeryGoogleMaps  ; 1♂ Spring Ridge , 31°39.11’S  ; 150°25.48’E, 15.ii.15, N. & D. Emery; 1♂ 64 km E Ebor , 30°04.08’S, 152°38.08’E, 654m, 4.i.13, N., C. & D. EmeryGoogleMaps  ; 2♂ 1♀ Killarney Gap, nr Bingara , 30°08.12’S, 150°04.33’E, 600m, 02.xii.13, N., C. & D. Emery (all DE)GoogleMaps  ; 5♂ 1♀ NSW.MRE, 50km S. of Moree, N.S.W., 29°53.0’S 149°47.3’E, 1.i.2004, Cooley, Hill, Marshall, Moulds; 1♂ same data as previous, VOUCHER 04. NSW.MRE.14, T. oldfieldi  GoogleMaps  ; 1♂ AU.NSW.INX ~ 15km E. of Delungra, N.S.W., 29°43.837’S 150°56.804’E, 700m, 1.i.2005, Hill, Marshall, Moulds; 1♀ AU.NSW.INW, C. 19km E. of Delungra, N.S.W., 29°44.097’S 150°59.147’E, 707m, 1.i.2005, Hill, Marshall, Moulds; 1♂ same data as previous, VOUCHER: SIMON LAB 05.AUGoogleMaps  .NSW.INW.02, Cicadetta oldfieldi  ; 1♂ AU. NSW.ROP, c. 3km W of Warialda , N.S.W, 29°33.076’S 150°35.263’E, 591m, 1.i.2005, Hill, Marshall, MouldsGoogleMaps  ; 6♂ 11 km N. of Baradine , 1.i.1974, M.S. & B.J. Moulds  ; 2♂ 3♀ Afterlee near Kyogle , 10.i.1975, M.S. & B.J. Moulds  ; 1♂ Inverell , 2.i.1985, M.S. & B.J. Moulds  ; 1 ♂ Kyogle , 7.i.1985, W. Rixon ( MSM). 

Etymology. Named after Mr Robert MacSloy of Alexandra Hills, Queensland. Mr MacSloy is one of only a small number of people who have the ability to recognise cicada species from their calls, and he has used this skill to contribute extensively to the current knowledge of the distributions and seasonality of cicadas over many years, particularly in south-east Queensland.

Diagnosis (Plate 1C, 1D; Figs 2View FIGURE 2 B, 8A, 9A).

Male and female specimens match the description given for E. oldfieldi  , though with some differences, as follows. Ventral surface of head mostly green to pale yellow-brown; postclypeus green, often with some dark brown coloration along midline; anteclypeus green to pale brown; rostrum pale brown anteriorly, becoming brown to dark brown towards apex. Dorsal surface of head green to olive-brown with a black band extending between the eyes and surrounding the interior margins of ocelli, though not extending to anterior margin; ocelli pink. Eyes deep red in living specimens, faded to brown in preserved specimens. Antennae dark brown, paler towards apex. Thorax green, sometimes fading to olive in dried specimens. Pronotum green with a thin, brown midline extending from the back of the head. Mesonotum green to olive-brown; midline broad, brown to pale brown, with lateral edges distinctly yellow; submedian sigilla darker than midline, brown to dark brown and typically darkest along parapsidal sutures; lateral sigilla green to olive-brown, sometimes indistinct. Legs with coxae and femora green or olive brown; tibia olive to pale brown; tarsi pale brown, becoming darker brown towards apex of claws. Wings with fore wing costal veins pale green to pale brown; pterostigma light brown. Hind wing veins pale brown or light green, becoming darker on posterior side of apical cells. Abdomen with tergites green or faded to olive-green; midline approximately 1 mm wide, brown, bordered by pale brown or yellow. Sternites pale green to yellow brown. Female abdominal segment 9 green, with a brown midline; ovipositor sheath extends approximately 1 mm beyond the termination of abdominal segment 9.

Measurements. N= 26♂ 8♀. Means and ranges (in parentheses), mm; BL: ♂ 17.1 (15.3–18.6), ♀ 21.4 (19.9– 23.1); FWL: ♂ 22.2 (19.3–25.9), ♀ 25.7 (23.7–26.5); FWW: ♂ 7.5 (6.8–8.0), ♀ 8.6 (8.2–9.0); HW: ♂ 6.1 (5.3– 7.0), ♀ 6.8 (6.4–7.0); PW: ♂ 5.2 (4.5–6.2), ♀ 5.9 (5.6–6.3); AW: ♂ 5.2 (4.8–5.8), ♀ 5.7 (5.3–6.0).

Distinguishing features. Ewartia roberti  n. sp. has a conspicuous, brown stripe medially along the dorsum, which extends from the proximal edge of the pronotum posteriorly to the apex of the abdomen. The stripe is distinctly narrow on the pronotum and to some extent along the abdomen, but is contrastingly broad on the mesonotum. This feature distinguishes it readily from E. brevis  , E. carina  n. sp. and E. cuensis  . A similar stripe is also present in E. etesia  n. sp., E. lapidosa  n. sp., E. oldfieldi  and E. thamna  n. sp.; however, its presentation in E. roberti  n. sp. is subtly unique. In E. roberti  n. sp., the stripe is narrower than the distance between the inner margins of the lateral ocelli. This distinguishes it from both E. oldfieldi  and E. lapidosa  n. sp., in which the stripe is conspicuously broader than the distance between the lateral ocelli, and most conspicuously broader at the anterior margin of the pronotum (compare Figs 2View FIGURE 2 A, 2B, 2C). It also distinguishes it from E. etesia  n. sp., in which the stripe is equal to or broader than the distance between the inner margins of the lateral ocelli ( Figure 2View FIGURE 2 D). In E. roberti  n. sp., the black colouration on the dorsal side of the head is extensive, and, in particular, it surrounds the lateral ocelli. This distinguishes it from E. thamna  n. sp., which has no black colouration on the dorsal side of the head. In addition, females of E. roberti  n. sp. can be distinguished from E. oldfieldi  and E. etesia  n. sp. by their short ovipositor length, which extends <1 mm beyond the apex of abdominal segment 9. In E. oldfieldi  , this extends 2.0– 2.5 mm, and in E. etesia  n. sp., it extends approximately 3 mm.

Distribution and habitat. This species occurs from near Monto and Isla Gorge in south-east Queensland south to near Macksville, Spring Ridge and the Warrumbungle National Park in northern New South Wales ( Fig. 10View FIGURE 10). Adults are present from late August until April. It occurs in association with various wattles ( Acacia  spp.) in dry sclerophyll forests, heathlands and also in urban environments, including road verges. Acacia fimbriata  is a major adult food plant in Brisbane. In Brisbane Forest Park, A. glaucocarpa  is inhabited. In the inland, specimens have been collected from A. spectabilis  . Other wattle species with small phyllodes tend to be favoured. Acacias with large, fleshy phyllodes (e.g. A. concurrens  ), are only utilised occasionally. In most seasons, E. roberti  n. sp. is a common species throughout its range. Local congregations of singing males are often prominently scattered throughout areas of suitable habitat. Adults are active from Late August or September to May, being most common from October to February.

This species overlaps in geographical distribution with E. oldfieldi  and E. lapidosa  n. sp., and sometimes occurs in sympatry with each of these taxa.

Calling song. The complex calling song mode of E. roberti  n. sp. ( Figs 11–13View FIGURE 11View FIGURE 12View FIGURE 13) contains repeated, exceptionally long subphrases (25.3– 36.6 s duration; all statistics n = 70 recordings). Each subphrase is composed of a long series of discrete macrosyllables (each 2–5 syllables, 0.029– 0.080 s duration), each separated by a (typically increasing) set of 1–5 discrete syllables (each 11–13 ms duration, gaps 0.053– 0.092 s duration), which is then followed by series of 3–4 echemes of increasing duration (0.107– 0.441 s), each punctuated by syllable sequences of decreasing duration (each between 0.337 and 1.234 s, containing intersyllable gaps of 0.009– 0.045 s duration), a climatic echeme (0.296– 2.351 s duration) and, finally, a long syllable sequence (4.416– 7.407 s duration, with intersyllable gaps of 0.031– 0.084 s duration). An accentuation then follows the syllable sequence at the end of most subphrases. This comprises typically 3–4 macrosyllables (each containing 2–5 syllables), each separated either by a syllable sequence (1–5 syllables, with intersyllable gaps of 0.031– 0.086 s duration) or, more rarely, an uninterrupted gap (0.142– 0.201 s), and followed by a final gap (0.123– 0.155 s duration). This calling song mode is typically produced at intervals throughout the day.

The simple calling song mode of this species ( Fig. 14View FIGURE 14) contains monotonously repeated phrases (0.3– 1.1 s duration). Each phrase typically contains a single echeme (0.25– 1.07 s duration) followed by a gap (0.053– 0.118 s duration); however, as the call progresses, the long echemes may be preceded by 1–2 discrete syllables or macrosyllables (each 0.011– 0.062 s duration), each followed by gaps (0.026– 0.064 s duration). This calling song mode predominates at dusk and is also produced occasionally at intervals during the day.

The presentation of the frequency spectra does not change between song modes. In each mode the calling song typically has a highest amplitude frequency plateau between 10.0 and 14.5 kHz, with a dominant frequency between 11.3 and 13.5 kHz (mean=12.3, n =22; e.g. Fig. 7View FIGURE 7 B).

The structure of the calling song of E. roberti  n. sp. is remarkably consistent across its wide distribution. The echeme, syllable sequence and subphrase durations do exhibit some variation, but this variation appears to be present within and among individuals in the broader population, without exhibiting any clear spatial pattern. Much of this variation considered likely to be at least partly temperature dependent.

NSW

Royal Botanic Gardens, National Herbarium of New South Wales

ANIC

Australian National Insect Collection

SUN

Sunderland Museum

MSM

Marine Science Museum, Tokai Univ.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hemiptera

Family

Cicadidae

Genus

Ewartia

Loc

Ewartia roberti

Popple, Lindsay W. 2017
2017
Loc

Cicadetta oldfieldi

Ewart 1988: 182
1988