Pison orbitale Pulawski, 2018

Pulawski, Wojciech J., 2018, A Revision of the Wasp Genus Pison Jurine, 1808 of Australia and New Zealand, New Guinea, and the Pacific Islands (Hymenoptera: Crabronidae), Proceedings of the California Academy of Sciences 65, pp. 1-584 : 317-320

Pison orbitale Pulawski , species nova

Figures 754 -763.

NAME DERIVATION.– Orbitale is a Latin neuter adjective pertaining to the noun orbita; with reference to the unusual shape of the eye orbits in this species.

RECOGNITION.– Pison orbitale shares with P. oculare (of which only the female is known) an unusually shallow eye emargination: its depth is less than half midocellar diameter ( Fig. 756 ), whereas in all other Pison the emargination is about as deep as midocellar diameter (e.g., Fig. 1176). Additionally, both species have a fine omalus, the hindtibial spines are evanescent, and the second recurrent vein joins the second submarginal cell near its midlength. Pison orbitale differs from P. oculare in having the following: clypeus above lamella with transverse, mesally interrupt- ed swelling, its punctures separated by linear interspaces; free margin of clypeal lamella slightly concave on each side of midpoint and angular laterally ( Fig. 754 ); ocellocular distance greater than hindocellar diameter (1.2-1.5 × hindocellar diameter in female and 1.3-1.5 × in male); tegula punctate throughout, totally concealing humeral plate; mesopleuron with ill-defined hypersternaulus; hindtibia without spines; gaster ferruginous, at least partly so. In P. oculare , the clypeus has no transverse swelling, its surface has well-defined punctures medially, many of which are more than one diameter apart, the free margin of the clypeal lamella is slightly, evenly arcuate, rounded laterally ( Fig. 749 ), the ocellocular distance is about equal to the hindocellar diameter, the tegula is partly impunctate, only partly concealing the humeral plate, the mesopleuron has no hypersternaulus, the hindtibia has minute spines on the outer surface; and the gaster is black.

DESCRIPTION.– Frons dull, finely punctate, punctures less than one diameter apart. Eye emargination unusually shallow, its depth less than half of midocellar diameter ( Fig. 756 ). Occipital carina slightly expanded ventrally, joining hypostomal carina. Gena narrow in dorsal view ( Fig. 757 ). Clypeal punctures separated by linear interspaces. Labrum not emarginate. Anteromedian pronotal pit transversely elongate, about as long as 1.5 × midocellar diameter. Scutum foveate along flange, with longitudinal ridges adjacent to posterior margin; scutal punctures fine, compressed against each other ( Fig. 758 ). Tegula enlarged, finely punctate throughout ( Fig. 758 ). Mesopleuron punctatorugose, with fine omaulus and ill-defined hypersternaulus. Postspiracular carina present but ill defined, about as long as midocellar diameter; integument depressed between postspiracular carina and episternal sulcus. Metapleural sulcus costulate between dorsal and ventral metapleural pits. Propodeum with irregular longitudinal carina separating side from dorsum and posterior surface and extending from gastral socket area toward spiracle; dorsum conspicuously rugose ( Fig. 759 ); side irregularly ridged; posterior surface rugose, with several conspicuous ridges radiating up from transverse carina just above gastropropodeal articulation. Forewing with three submarginal cells; second recurrent vein joining submarginal cell II near its lower gena suberect, shorter than midocellar diameter; not concealing integument on clypeus. Apical depressions of terga with silvery, mesally interrupted setal fasciae.

Head, thorax, and propodeum black, clypeus yellowish brown in some females next to lamella free margin; flagellum light brown ventrally in some specimens; mandible black basally and brown apically, varying from black to yellowish brown in between. Femora, tibiae and tarsi varying from all ferruginous to all black. Gaster all ferruginous or apical segment dark, but segments IV-VII black in most males, and only apical part of tergum I and median part of tergum II ferruginous in specimen from Cobourg Peninsula, Northern Territory.

♀.– Upper interocular distance equal to 0.92 × lower interocular distance; ocellocular distance equal to 1.2-1.5 × hindocellar diameter, distance between hindocelli equal to 1.2-1.3 × hindocellar diameter; eye height equal to 1.02-1.12 × distance between eye notches. Clypeus shortly above lamella with transverse swelling extending from orbit to orbit but interrupted mesally, slightly concave beneath carina; free margin of lamella slightly concave on each side of midpoint, angular laterally ( Fig. 754 ). Dorsal length of flagellomere I 2.0-2.3 × apical width, of flagellomere IX 0.7 × apical width. Mandible: trimmal carina without incision. Length 4.9-5.6 mm; head width 1.6-1.9 mm.

♂.– Upper interocular distance equal to 0.96-1.0 × lower interocular distance; ocellocular distance equal to 1.3-1.5 × hindocellar diameter, distance between hindocelli equal to 1.2-1.3 × hindocellar diameter; eye height equal to 1.08-1.10 × distance between eye notches. Free margin of clypeal lamella pointed mesally ( Fig. 755 ). Dorsal length of flagellomere I 2.0 × apical width, of flagellomere X 0.9-1.0 × apical width. Sternum VIII truncate apically ( Fig. 760 ). Genitalia: Figs.

761, 762. Length 4.6-4.9 mm; head width

1.4-1.6 mm.

GEOGRAPHIC DISTRIBUTION (Fig. 763).–

Northern Territory, Queensland, South Australia, Western Australia.

RECORDS.– HOLOTYPE: ♀, AUSTRALIA: Western Australia: Mount Augustus National Park at

24°18.0ʹS 116°47.6ʹE, 25 Apr – 7 May, M.E. Irwin and F.D. Parker (ANIC).

PARATYPES: AUSTRALIA: Northern Territory :

Black Point in Cobourg Peninsula at 11°09ʹS

132°09ʹE, 31 Jan 1977, E.D. Edwards (1 ♂, ANIC) ;

Fogg Dam 74 km E Darwin, 17 Sept 1979, H.E. and

M.A. Evans (1 ♀, QMB); Gregory National Park at FIGURE 763. Collecting localities of Pison orbitale 15°36ʹ43ʺS 130°24ʹ08ʺE, 6-12 June 2001, M.E. Pulawski, sp. nov .

Irwin, F.D. Parker, and C. Lambkin (1 ♀, ANIC) ,

16°00ʹ52ʺS 130°48ʹ18ʺE, 18-19 June 2001, ME. Irwin and F.D. Parker (2 ♀, 1 ♂, ANIC) , 16°03ʹ01ʺS 130°24ʹ07ʺE, 6-20 June 2001, M.E. Irwin, F.D. Parker, and C. Lambkin (1 ♀, CAS) , 16°06.6ʹS 130°25.7ʹE, 24 May – 4 June 2001 and 4-12 June 2001, same collectors (2 ♀, ANIC) , and 16°06ʹ42ʺS 130°25ʹ23ʺE, 24 May – 5 June 2001, T. Weir, K. Pullen, and P. Bouchard (1 ♀, CAS) ; Surprise Creek 45 km SSW Borroloola at 16°25ʹS 135°05ʹE, 5 Nov 1975, J.C. Cardale (1 ♀, ANIC) . Queensland: Hann River at 15°11ʹS 143°52ʹE, 20 Oct – 17 Nov 1993, P. Zborowski and M. Horak (1 ♀, ANIC) ; Split Rock 14 km SE Laura at 15°39ʹS 144°31ʹE, 24 June – 29 July 1992, P. Zborowski and E.S. Nielsen (1 ♀, ANIC) , 29 June – 24 Aug 1992, P. Zborowski and J.C. Cardale (1 ♀, ANIC) , 13 Dec 1992 – 18 Feb 1993, P. Zborowski (1 ♀, CAS) . South Australia: Monaree Station 8.8 km SE Monaree Hill at 31°59ʹ06ʺS 135°39ʹ36ʺE, 15-20 Oct 2006, WHC Monaree Survey (1 ♀, AMS) . Western Australia: Cape Range National Park: Mandu Mandu Creek at 22°08ʹS 113°52ʹE, 11-12 July 2002, D.J. Bickel (1 ♂, CAS) ; Great Northern Highway 45 km S Newman at 23°42.4ʹS 119°44.3ʹE, 24 Apr 6 – May 2003, M.E. Irwin and F.D. Parker (1 ♂, ANIC) ; Kennedy Range National Park at 24°38.7ʹS 115°10.7E, 26 Apr – 10 May 2003, F.D. Parker and M.E. Irwin (1 ♀, CAS) ; Mount Augustus National Park at 24°18.0ʹS 116°47.6ʹE, 25 Apr – 7 May 2003, M.E. Irwin and F.D. Parker (3 ♀, 3 ♂, CAS) , 24°22.8ʹS 116°54.2ʹE, 25 Apr – 7 May 2003, M.E. Irwin and F.D. Parker (1 ♀, CAS) , 9-23 May 2003, F.D. Parker and M.E. Irwin (2 ♀, CAS) ; 65 km E Nanutarra Roadhouse at 22°27.8ʹS 116°02.6ʹE, 5-12 May 2003, M.E. Irwin and F.D. Parker (2 ♀, CAS) ; Nanutarra – Wittenoom road at 22°21ʹ21ʺS 117°54ʹ16ʺE, 30 Sept – 5 Oct 2004, CVA [= Conservation Volunteers Australia] (2 ♂, SAM)

Figures

FIGURES 754-759. Pison orbitale Pulawski, sp. nov. (754) Female clypeus and mandible; (755) Male clypeus and mandible; (756) Female head in frontal view; (757) Female head in dorsal view; (758) Female tegula and adjacent scutum; (759) Propodeal dorsum of female.

FIGURES 749-752. Pison oculare Pulawski, sp. nov., female. (749) Clypeus and mandibles; (750) Head in frontal view; (751) Portion of left forewing (arrow shows second submarginal cell); (752) Portion of right forewing (arrow shows second submarginal cell). FIGURE 753. Collecting localities of Pison oculare Pulawski, sp. nov.

FIGURES 760-762. Pison orbitale Pulawski, sp. nov., male. (760) Sternum VIII (ventral surface); (761) Genitalia in dorsal view; (762) Genitalia in lateral view.