Pison impressiventre 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 : 230-233

Pison impressiventre Pulawski , species nova

Figures 530 -536.

NAME DERIVATION.– Impressiventre, a neuter adjective, derived from two Latin words, impressus, impressed, and venter, gaster; with reference to the structure of male sterna.

RECOGNITION.– Pison impressiventre has three submarginal cells, the second recurrent vein contiguous with the second intersubmarginal vein or nearly so, setae of terga golden or with golden tinge, appressed on tergum I. The female is largely unspecialized: it has a well-defined middle clypeal lobe, with an obtusely angulate lamella (less projecting than in P. protrudens ); the clypeal surface not concave dorsal of the lamella; the punctures of the upper frons and mesopleuron less than one diameter apart; the gena punctate and setose on both side of the oral fossa, with no psammophore, the setae of the lower gena erect, slightly sinuous, about 1.3 × as long as midocellar diameter; the ocellocular distance equal to 1.1-1.5 × the hindocellar diameter, the distance between hindocelli equal to 1.2-1.3 × the hindocellar diameter; tergum VI without median carina; sterna III and IV punctate throughout. It shares with P. decipiens the presence of a preapical tooth on the trimmal mandibular carina ( Fig. 530 ). Pison translucens differs in lacking the preapical mandibular tooth and in having the clypeal lamella slightly broader (compare Figs. 530 and 1126); also, the ocellocular distance is 0.9-1.1 × midocellar diameter in P. translucens , but 1.1-1.5 in P. impressiventre . The females of P. decipiens and P. impressiventre are almost identical morphologically, and they can best be recognized by association with topotypical males. The most reliable recognition character is the coloration of the tergal setae, which are all silvery in P. decipiens , but golden or with golden tinge in P. impressiventre . Somewhat helpful is the color of the gaster, all black (except for the apical depressions) in P. impressiventre , and all or partly ferruginous basally in several P. decipiens . In addition, P. impressiventre is known from the Northern Territory and Western Australia, whereas P. decipiens occurs not only there, but also in New South Wales, South Australia, and Queensland.

The male is easily recognized by its unique, round posteromedian impressions on sterna IV-VI ( Fig. 532 ); the impressions are minutely punctate, whereas the adjacent preapical portions of sterna are unsculptured. In addition, the apical margin of sternum VIII is at least minimally convex mesally, combined with the acute apicolateral corner ( Fig. 533 ). Pison decipiens is nearly identical but the sterna have no posteromedian impressions and the apical margin of sternum VIII is not convex mesally.

DESCRIPTION.– Frons dull, with punctures less than one diameter apart. Occipital carina joining hypostomal carina. Labrum not emarginate. Anteromedian pronotal pit transversely elongate, about as long as midocellar diameter. Scutum not foveate along flange, without longitudinal ridges adjacent to posterior margin; scutal punctures less than one diameter apart; interspaces unsculptured, shiny. Tegula enlarged. Mesopleural punctures well defined, less than one diameter apart; interspaces at center with sparse, microscopic punctures. Postspiracular carina present, about as long as midocellar diameter. Metapleural sulcus not 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 punctate and also finely, obliquely ridged on at least part of surface; posterior surface conspicuously, transversely ridged, punctate between ridges. Punctures of tergum I fine, less than one diameter apart. Sternum II punctate throughout.

Setae silvery on head, thorax, and propodeum, golden or with golden tinge on terga, forming setal fasciae on apical depressions; frons with erect setae and also with patch of appressed, dorsolaterally oriented setae on each side below midocellus; scutum with sparse, erect setae; lower gena with erect, slightly sinuous setae about 1.3 × as long as midocellar diameter; tergum I with appressed setae only; setae completely concealing integument on clypeus except lamella.

Head, thorax, and propodeum black; mandible black basally, ferruginous subapically, dark brown apically; scape ferruginous ventrally in many males, flagellum ferruginous to brown ventrally (apex black) in many females and most males. Fore- and midfemora black, ferruginous apically (largely so in male); hindfemur varying from all black to all ferruginous in female, ferruginous in male; tibiae and tarsi ferruginous or female fore- and midtibiae partly black. Gaster black, apical depressions of terga ferruginous or brown, sternum VIII of male ferruginous (at least partly so).

♀.– Upper interocular distance equal to 0.92-0.96 × lower interocular distance; ocellocular distance equal to 1.1-1.5 × hindocellar diameter, distance between hindocelli equal to 1.2-1.3 × hindocellar diameter; eye height equal to 0.90-0.94 × distance between eye notches. Free margin of clypeal lamella obtusely angulate ( Fig. 530 ). Dorsal length of flagellomere I 2.0-2.2 × apical width, of flagellomere IX 1.1 × apical width. Mandible: trimmal carina with tooth at about two thirds of length. Length 7.6-9.8 mm; head width 2.3-3.1 mm.

♂.– Upper interocular distance equal to 0.96-1.00 × lower interocular distance; ocellocular distance equal to 1.2-1.5 × hindocellar diameter, distance between hindocelli equal to 1.2-1.5 × hindocellar diameter; eye height equal to 0.98-1.00 × distance between eye notches. Free margin of clypeal lamella acutely angulate ( Fig. 531 ). Dorsal length of flagellomere I 1.7-1.8 × apical width, of flagellomere X 1.1-1.2 × apical width. Sterna IV-VI with unsculptured, shiny zone anterior of apical depression, with round apicomedian impressions ( Fig. 532 ) that are minutely punctate; sternum VII densely, finely punctate; sternum VIII with unsculptured swelling at about midlength, finely, densely punctate between swelling and apical margin; apical margin shallowly, broadly emarginate, convex medially, apicolateral angle well defined ( Fig. 533 ). Genitalia: Figs. 534, 535 . Length 6.5-8.4 mm; head width 1.9-2.7 mm.

GEOGRAPHIC DISTRIBUTION (Fig. 536).– Northern Territory, Western Australia.

RECORDS.– HOLOTYPE: ♂, AUSTRALIA: Western Australia: Great Northern Highway at

23°02.6ʹS 118°50.2ʹE, 23 Apr – 6 May 2003, M.E.

Irwin and F.D. Parker (ANIC).

PARATYPES: AUSTRALIA: Northern Territory :

76.9 km NNE Lajamanu at 17°14ʹ30ʺS

130°54ʹ14ʺE, 11-17 June 2001, M.E. Irwin, F.D.

Parker, and C. Lambkin (1 ♀, ANIC); Native Gap

15 km S Alleron at 22°49ʹS 133°25ʹE, 11 Apr 1981,

M. Malipatil (1 ♀, NTM); Renner Springs, 25 Oct

1971, C.G. Roche (1 ♂, CAS); West MacDonnell

National Park ca 3 km W road to Simpson Gap at

23°41.8ʹS 133°41.7ʹE, Ch.M. Palmer, 27 Nov –

27 Dec 2006 (1 ♀, CAS; 1 ♀, NTM), 27 Aug –

27 Sept 2007 (1 ♀, NTM). Western Australia: M.E. FIGURE 536. Collecting localities of Pison impressiventre Irwin and F.D. Parker collectors for all following Pulawski, sp. nov.

records except as indicated: Balgo Hills, no date,

M. Golding (1 ♂, ANIC) ; 10 km W Cobra Station at 24°10.2ʹS 116°23.0ʹE, 26 Apr – 10 May 2003 (11 ♀, CAS; 22 ♂, USU) ; Great Northern Highway at 23°02.6ʹS 118°50.2ʹE (3 ♂, CAS) ; Great Northern Highway 82 km S Karijini Drive at 23°07.3ʹS 119°05.5ʹE, 23 Apr – 16 May 2003 (1 ♀, ANIC; 1 ♀, 4 ♂, CAS; 6 ♀, USU) ; Hamersley Station at 22°29ʹ10ʺS 117°41ʹ28ʺE, 22-27 Sept 2005, CVA [= Conservation Volunteers Australia] (1 ♀, AMS) ; Karijini National Park at 22°25.6ʹS 118°23.7ʹE, 21-23 Apr and 23 Apr – 4 May 2003 (2 ♂, ANIC) , at 22°26.3ʹS 118°22.9ʹE, 23 Apr – 4 May 2003, M.E Irwin and F.D. Parker (1 ♀, CAS) , at 22°28.4ʹS 118°32.6ʹE, 23 Apr – 4 May 2003 (26 ♀, 18 ♂, ANIC; 13 ♀, CAS), at 22°28.7ʹS 118°32.3ʹE, 23 Apr – 4 May 2003 (1 ♂, ANIC; 5 ♀, USU), at 22°28.8ʹS 118°21.6ʹE, 21 Apr 2003 (1 ♂, ANIC; 1 ♀, USU), at 22°29.5ʹS 118°30.1ʹE, 21-23 Apr 2003 (1 ♀, USU) , and at 22°34.5ʹS 118°30.2ʹE, 22-23 Apr 2003 (2 ♂, ANIC; 1 ♀, USU) ; Kennedy Range National Park at 24°38.7ʹS 115°10.7ʹE, 26 Apr – 10 May 2003 (2 ♀, 1 ♂, ANIC) ; 11 km SW Marble Bar at Brockman Creek at 21°09.0ʹS 119°51.7ʹE, 2-14 May 2003 (3 ♂, ANIC) ; 63 km E Marble Bat at 21°13.0ʹS 120°20.2ʹE, 2-14 May 2003 (1 ♂, ANIC; 1 ♀, CAS) ; 104 km E Marble Bar at 21°19.1ʹS 120°40.3ʹE, 2-15 May 2003 (1 ♂, ANIC; 1 ♀, CAS) ; 133 km E Marble Bar and 17 km E Woodstock station at 21°41.6ʹS 119°04.8ʹE, 3-16 May 2003 (9 ♀, 12 ♂, CAS) ; Meekatharra-Billiluna Pool , Apr 1930 – Aug 1931, Canning Stock Rte. Exped. (2 ♂, SAM) ; Mount Augustus National Park at 24°18.0ʹS 116°47.6ʹE (1 ♀, 3 ♂, USU) and 24°21.7ʹS 116°50.2ʹE, 7-9 May 2003 (1 ♀, ANIC; 3 ♀, CAS) ; Nanutarra - Wittenoom road at 22°26ʹ8ʺS 117°49ʹ56ʺE, 22-27 Sept 2005, CVA [= Conservation Volunteers Australia] (2 ♀, AMS) ; 158 km S Newman (= 9 km N Kumarina Roadhouse ) at 24°37.8ʹS 117°36.8ʹE (correctly 119°36.8ʹE), 7-18 May 2003 (8 ♀, ANIC) ; 47 km S Pardoo Roadhouse on Shay Gap Road at 20°22.7ʹS 120°01.3ʹE, 1-14 May 2003 (1 ♀, 6 ♂, CAS; 2 ♀, USU) ; 80 km S Pardoo Roadhouse on Shay Gap Road at 20°28.3ʹS 120°10.0ʹE, 5 Jan – 14 May 2003 (5 ♂, ANIC; 13 ♀, USU) ; Serpentine Falls in Darling Ranges , 20 Jan 1971, G.A. Holloway (1 ♀, AMS) ; in site Plb 94 at 22°15.04ʹS 117°53.36ʹE, M. Elliott (1 ♂, AMS) .

Figures

FIGURES 530-535. Pison impressiventre Pulawski, sp. nov. (530) Female clypeus and mandibles; (531) Male clypeus and mandibles; (532) Apical gastral segments of male in oblique lateral view; male: (533) Sternum VIII (ventral surface); (534) Genitalia in dorsal view; (535) Genitalia in lateral view.