Revision of Australian Parathyginus with description of two new species, along with first detailed description of aedeagus in the family Heterogastridae (Hemiptera: Heteroptera: Lygaeoidea) Malipatil, M. B. Zootaxa 2021 2021-08-09 5016 4 503 522 8QM66 Malipatil, 2021 Malipatil 2021 [151,464,151,178] Insecta Heterogastridae Parathyginus Animalia Hemiptera 13 516 Arthropoda species acuminatus sp. nov.  ( Figs. 43–55)   Type specimens:  Holotypemale, AUSTRALIA, South Australia, Near Victory Well, Everard Pk Stn., at light,  3 xi. 1970, G.F. Gross,  Paratypes, 50 male, 43 female, same data as holotype, all in SAM.  Other specimens examined:  SOUTH AUSTRALIA: 9 male, 8 female, Musgrave Ra., NG04,  8 kmNE Mt Woodroofe, 26 17 10 S 131 48 20E, Pitjantjatjara Landssurvey, at light,  14.x.1994, in SAM;  2 male, 1 female, Musgrave Ra., NG03, 7 kmNE, 26 16 42S 131 47 44E, at light,  15.x.1994, in SAM;  1m,  Blue Hills Bore, 27 7 52S 132 51 58E, Pitjantjatjara Landssurvey, pitfall,  22.iii.1993, in SAM;  1 female, 0.6 ESE Mt Lindsay, gorge access, 27 02 04S 129 53 23E, Pit Landssurvey WAT0103, at light,  20.x.1996, in SAM,  4 female, same data as above,  2.xi.1970, EG Matthews, in SAM;  3 male, 2 female, Everard Rgs SAto Warburton RgsWA, A. Brumby, in SAM.  NORTHERN TERRITORY: 4 male, 5 female, Tindal, 14 31S 132.22E, light trap,  1-20 xii.1967, W.J.M. Vestjens, in ANIC;  1 female, Horn Islet, Sir Edward Pellew Group,  25-31. i. 1968, B. Cantrell, in QM;  1 male, 1 female, same locality and collector,  15-21.ii.1968, in QM,  4 female, same locality and collector,  22-28.ii.1968, in QM;  1 male, 3 female, 16 40S 135 51E, Bessie Springs  8 kmESE Cape Crawford,  26.x.1975, M.S. Upton, in ANIC;  1 female, 16.34S 135.41E,  14 kmNW Cape Crawford,  6.xi.1975, M.S. Upton, in ANIC;  1 female, Stuart Hwy,  26 kmS Tennant Creek,  29.xi.1972, D.H. Colless, in ANIC;  1 female, Aileron,  5-6.xi.1974, at light, E.M. Exley& R.I. Storey, in QM;  1 male, 48 miles[ca 77 km] WEW Alice Springs,  10.ii.1966, Britton, Upton& McInnes, in ANIC;  1 female, west of Mulga Park, at light,  22.x.1960, J. Findlay, in SAM.  WESTERN AUSTRALIA: 1 female, 14.49S 126.49E Carsonescarpment, Drysdalesurvey 1975-site B1,  9-15.viii.1975, I.F.B. Common& M.S. Upton, in ANIC;  2 male, 1 female, 21.20S 117.15EGPS Millstream-ChichesterN.P. Black Hill Pool,  1.v.2003, T. Weir, in ANIC;  1 male, 2 female, W side North West Cape, N of Cape Range Park,  27-28.vii.1978, H. & A. Howden, in ANIC.  QUEENSLAND: 1 male, 1 female, Bucasia,  11.xii.2003, K.J. Sandery, in ANIC,  2 female, same locality and collector,  14.i.2004, in ANIC,  1 female, same locality and collector,  11.xi.2005, in ANIC,  1 female, same locality and collector,  21.xi.2005, in ANIC;  1 female, 23.83554, 151.26086, Gladstone, central port entrance, panel trap(-pinene-EtoH lure),  29.xi.-13.xii.2016, D. O’Hara, in QDPI;  1 female, 26 16S 151 25E, Koyproperty, Brigooda,  15.xii.1994, Monteith& Thompson, in QM.   Description. Colour. Male( Figs. 45, 46, 49, 50): Body ground colour white-stramineous, with following dark brown: head above and below, most of anterior lobe of pronotum, most of basal area of scutellum, apical 1/3 of corium, small irregular patch along claval commissure, short diffuse streak along costal vein, thoracic pleura, and subapical incomplete ringlike area on hind femora. Antennae with most of 4 th, apical about ½ of 3 rd, and apical area of 2 nddarker than remainder. Bases of hind tibiae and all claws dark brown. Membrane with transverse dark fascia as in Fig. 45. Abdomen ventrally castaneous. Female( Figs. 43, 44, 47, 48): generally, slightly darker than male. Fore and mid femora also with subapical incomplete fuscous rings. Abdominal venter like thoracic pleura, connexiva of each segment with yellow brown patches ( Fig. 48).  Body(measurements are of holotypemale, followed by ranges of 5 specimens(male and female) in parentheses). Elongate ovate, slightly shiny above. Body investiture as in  P. signifer, golden pubescence, short dense bristly setae all over, and long sparse bristly setae that are less prominent on legs and corium; length including wings 5.46 (4.60–6.86); maximum width across abdomen 1.52 (1.97–2.12).  Head. Juga with carina faintly developed, eyes not stylate in males, head length 0.87 (0.76–1.06); width across eyes 1.22 (1.10–1.48); interocular space 0.72 (0.57–0.87); interocellar space 0.40 (0.27–0.49); eye-ocellar space 0.08 (0.07–0.08); eye length 0.38 (0.34–0.45); eye width 0.30 (0.26–0.34). Lengths of antennal segments: I 0.38 (0.35–0.45), II 0.98 (0.87–1.17), III 0.83 (0.72–0.95), IV 0.95 (0.83–0.98). Labium extending to middle coxae in males, to hind coxae in females, 1 stsegment reaching to or almost to base of head, lengths of labial segments: I 0.63 (0.70–0.91), II 0.72 (0.72–0.95), III 0.57 (0.57–0.72), IV 0.42 (0.41–0.49).  Thorax.Pronotum short, subequal to head length, median length of pronotum 0.95 (0.83–1.10); width at anteri- or margin 0.91 0.83–1.06; width at posterior margin 1.48 (1.29–1.90). Length of scutellum 1.1.7 (1.10–1.52), width 0.91 (0.76–1.14). Hemelytra well exceeding abdomen, clavus punctate with 3 rows and some irregular punctures between middle and inner rows, all punctures similar sized; length of hemelytra 3.50 (3,26–4.60); length of corium 2.31 (2.16–2.96); claval commissure 0.26 (0.26–0.38).  Abdomen.All terga and sterna moderately dark except for connexival area that is pale. Terga II–VI medially with dense fine punctures ( Fig. 49). Scent gland scars between terga IV–V and V–VI of subequal width ( Fig. 49). Inner laterotergites absent (but in some Northern Territoryspecimens very narrow inner laterotergites present between tergites III–V). Trichobothria reduced, trichobothrial bases surrounded by small pale areas.  Male genitalia.Male with sterna narrowly pale along connexiva of segments II to VI, but not VII ( Fig. 50). Posterolateral angles of segments IV, V and VI without acute spinules. Pygophore roundish in overall shape, posterior margin with a median small pointed process (visible in undissected specimen) ( Fig. 51, arrowed). Paramere with blade broad ( Fig. 52), tip narrowly rounded and with a subapical indentation on outer surface, and without tooth on inner surface. Aedeagus as in  P. signifer, except slightly reduced ejaculatory reservoir, and vesica as in Figs. 53, 54.  Female genitalia.Spermatheca ( Fig. 55).   Etymology.The specific epithet “  acuminatus” is Latin adjective = pointed, sharpened, alludes to the pointed median projection on posterior margin of the pygophore, a major diagnostic character of this species.   Comments.There is slight variation in coloration in examined specimens, even within one series of specimens. For example, Bucasia ( Queensland) specimens are slightly darker overall ( Figs. 47, 48); in some female specimens, most of the posterior pronotal lobe is also dark like the anterior lobe, and connexiva have intersegmental areas with broad dark bands; and in male specimens the abdominal venter is dark. Most of the specimens examined were collected from arid interior regions, often along escarpment and mountain ranges in South Australia, Western Australia, and Northern Territory. Some specimens were collected by light trapping and from pit traps.   Distribution. Australia( South Australia, Western Australia, Northern Territoryand Queensland). 1970-11-03 G. F. Gross Australia Near Victory Well 13 516 1 South Australia holotype [355,1095,295,322] 1970-11-03 SAM G. F. Gross Australia Near Victory Well 13 516 93 43 50 South Australia paratype 1994-10-14 SAM Musgrave Ra., NG -26.28611 Pitjantjatjara Lands 20 131.80556 13 516 17 8 9 South Australia 1994-10-15 SAM 1 -26.278334 Musgrave Ra. 20 131.79556 13 516 3 1 2 SOUTH AUSTRALIA 1993-03-22 SAM -27.131111 Pitjantjatjara Lands 20 132.86612 Blue Hills Bore 13 516 1 SOUTH AUSTRALIA 1996-10-20 SAM -27.034445 Pit Lands 20 129.88972 Mt Lindsay 13 516 1 1 SOUTH AUSTRALIA 1970-11-02 SAM Matthews -27.034445 Pit Lands 20 129.88972 Mt Lindsay 13 516 4 4 SOUTH AUSTRALIA [546,1432,511,538] SAM Everard Rgs SA & Warburton Rgs & A. Brumby 13 516 5 2 3 SOUTH AUSTRALIA 1967-12-01 1967-12-20 1967-12-01 ANIC W. J. M. Vestjens -14.516666 Tindal 1070 132.22 13 516 9 5 4 Northern Territory [266,1223,583,610] 1968-01-25 1968-01-31 1968-01-25 QM B. Cantrell Sir Edward Pellew Group Horn Islet 13 516 1 1 NORTHERN TERRITORY 1968-02-15 1968-02-21 1968-02-15 QM B. Cantrell Sir Edward Pellew Group Horn Islet 13 516 2 1 1 NORTHERN TERRITORY [729,1410,619,646] 1968-02-22 1968-02-28 1968-02-22 QM B. Cantrell Sir Edward Pellew Group Horn Islet 13 516 4 4 NORTHERN TERRITORY 1975-10-26 ANIC Upton -16.666666 Bessie Springs 1281 135.85 13 516 4 3 1 NORTHERN TERRITORY 1975-11-06 ANIC Upton -16.34 14 km NW Cape Crawford 769 135.41 13 516 1 1 NORTHERN TERRITORY 1972-11-29 ANIC D. H. Colless Stuart Hwy 13 516 1 1 NORTHERN TERRITORY 1974-11-05 1974-11-06 1974-11-05 QM E. M. Exley & R. I. Storey Aileron 13 516 1 1 NORTHERN TERRITORY 1966-02-10 ANIC Britton & Upton & McInnes Alice Springs 13 516 1 1 NORTHERN TERRITORY [234,1011,799,826] 1960-10-22 SAM J. Findlay Mulga Park 13 516 1 1 NORTHERN TERRITORY 1975-08-09 1975-08-15 1975-08-09 ANIC Common & Upton -14.49 Drysdale 772 126.49 Carson 13 516 1 1 Western Australia 2003-05-01 ANIC T. Weir -21.2 Black Hill Pool 758 117.15 Millstream-Chichester 13 516 3 1 2 WESTERN AUSTRALIA 1978-07-27 1978-07-28 1978-07-27 ANIC H. & A. Howden North West Cape 13 516 3 2 1 WESTERN AUSTRALIA [233,1123,943,970] 2003-12-11 ANIC Sandery Bucasia 13 516 2 1 1 Queensland 2004-01-14 ANIC Sandery Bucasia 13 516 2 2 QUEENSLAND [496,1161,979,1006] 2005-11-11 ANIC Sandery Bucasia 13 516 1 1 QUEENSLAND 2005-11-21 ANIC Sandery Bucasia 13 516 1 1 QUEENSLAND 2016-11-29 2016-12-13 2016-11-29 QDPI O'Hara 23.83554 Gladstone 1 151.26086 13 516 1 1 QUEENSLAND 1994-12-15 QM Monteith & Thompson -26.266666 Brigooda 1242 151.41667 Koy 13 516 1 1 QUEENSLAND