Pison dentatum 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 : 143-146

Pison dentatum Pulawski , species nova

Figures 283-291.

NAME DERIVATION.– Dentatum, Latin neuter adjective meaning with teeth; with reference to the toothed mandibular apex.

RECOGNITION.– Pison dentatum is an all black species, with three submarginal cells, the second recurrent vein interstitial with the second intersubmarginal vein, and the setae appressed on tergum I.

The female has the lower gena (on each side of the oral fossa) shiny, unsculptured, and asetose, with the unsculptured area bordered by a psammophore; a well-defined psammophore is also present on the forefemur. It differs from other such species by the combination of two characters: the inner mandibular margin with two preapical teeth ( Fig. 283 ), and the tegula entirely or largely punctate (with the marginal rim impunctate, Fig. 286 ). Subsidiary recognition features are: clypeal lamella non-tridentate, mandible black basally, wihout preapical teeth on inner margin. The mandible with two preapical teeth is also found in P. tridentatum , in which the occipital carina

0.5 × midocellar diameter. 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 obliquely ridged, microscopically punctate between ridges; side ridged (ridges conspicuous dorsally), punctate between ridges; posterior surface with well-defined, transverse ridges, punctate between ridges. Posteroventral forefemoral surface minutely, closely punctate. Hindcoxal dorsum with outer margin obtusely carinate. Punctures of tergum I about one diameter apart on horizontal part, microscopic and close to each other on apical depression. Punctation of sterna variable: in most specimens, sternum II impunctate apicomesally and sternum III aciculate and impunctate or with a few sparse punctures mesally; in specimens from 79 km NNW Renmark, most of sternum II (except basally and laterally) and sternum III with a few microscopic punctures; in specimen from 32 km N Renmark, sternum II punctate except on small apicomedian area, and sternum III punctate.

Setae silvery, suberect and as long as or shorter than midocellar diameter on upper frons, appressed on postocellar area, scutum, and tergum I; completely concealing integument on clypeus in female, nearly completely in male; see below for setae of lower gena. Apical depressions of terga I-IV in female, I-V in male, with silvery, setal fasciae

Body all black, mandible brown mesally.

♀.– Upper interocular distance equal to 0.62-0.66 × lower interocular distance; ocellocular distance equal to 0.6-0.9 × hindocellar diameter, distance between hindocelli equal to 0.9-1.2 × hindocellar diameter; eye height equal to 0.94-0.96 × distance between eye notches. Free margin of clypeal lamella arcuate in most specimens ( Fig. 283 ), but obtusely triangular in specimen from 32 km N Renmark and one from Brookfield Conservation Park. Dorsal length of flagellomere I 2.6-2.7 × apical width, of flagellomere IX 1.1-1.3 × apical width. Lower gena, mandibular posterior margin, propleural and forecoxal outer margins, and forefemoral venter with psammophores (longest setae of genal, mandibular, and forefemoral psammophores about 0.5-0.7 ×, 0.6-0.7 ×, and 0.7-0.9 ×, respectively, of greatest forefemoral width); lower gena impunctate and asetose between hypostomal carina and psammophore. Mandible tridentate apically ( Fig. 283 ), i.e., with two preapical teeth. Length 7.0- 7.2 mm; head width 2.4-2.5 mm.

♂.– Upper interocular distance equal to 0.72-0.74 × lower interocular distance; ocellocular distance equal to 0.7-1.1 × hindocellar diameter, distance between hindocelli equal to 1.1-1.3 × hindocellar diameter; eye height equal to 0.94-0.96 × distance between eye notches. Free margin of clypeal lamella either arcuate or with small median point ( Fig. 284 ). Flagellum either cylindrical or flagellomeres III-VI slightly convex ventrally ( Fig. 287 ). Dorsal length of flagellomere I 2.0 × apical width, of flagellomere X 1.0-1.3 × apical width. Mandible bidentate apically ( Fig. 284 ). Setae of lower gena erect, up to about 1.5 × as long as midocellar diameter. Sternum VIII shallowly, broadly emarginate apically ( Fig. 288 ). Genitalia: Figs. 289, 290 . Length 6.1-6.3 mm; head width 1.9 mm.

GEOGRAPHIC DISTRIBUTION ( Fig. 291 ).–

New South Wales, Northern Territory, Queensland, South Australia, Western Australia.

RECORDS.– HOLOTYPE: ♂, AUSTRALIA:

Queensland: Hann River at 15°11ʹS 143°52ʹE,

17 Aug – 15 Sept 1993, P. Zborowski and S. Shattuck (ANIC).

PARATYPES: AUSTRALIA: New South Wales :

100 km SE Broken Hill at 32°51ʹS 141°37ʹE, 3-13

Oct 1988, E.D. Edwards (2 ♀, ANIC); Northern

Territory: 22 km WSW Borroloola, 16 Apr 1976,

D.H. Colless (1 ♀, CAS); Kakadu National Park :

Ngarradj Warde Djobkeng at 12°27ʹS 132°55ʹE,

27 June 1980, I.D. Naumann (1 ♂, ANIC). Queensland: Hann River at 15°11ʹS 143°52ʹE, 17 Aug – FIGURE 291 . Collecting localities of Pison dentatum 15 Sept 1993, P. Zborowski and S. Shattuck (1 ♀, Pulawski, sp. nov.

1 ♂, ANIC) and 15 Sept – 20 Oct 1993, P. Zborowski and D. Rentz (1 ♀, ANIC) ; Heathlands at 11°45ʹS 142°35ʹE, [no day] June – 25 July 1992, P. Zborowski and E.S. Nielsen (1 ♂, ANIC) ; 3 km NE Mount Webb at 15°03ʹS 145°09ʹE, 1-30 Oct 1980, J.C. Cardale (1 ♂, ANIC; 1 ♀, CAS) ; Split Rock at 15°39ʹS 144°31ʹE, 24 June – 29 July 1992, P. Zborowski and E.S. Nielsen (1 ♀, 1 ♂, ANIC) , 29 June – 24 Aug 1992, P. Zborowski and J.C. Cardale (1 ♀, ANIC) , and 24 Aug – 21 Sept 1992, P. Zborowski and L. Miller (1 ♀, ANIC) ; same data as holotype (1 ♂, ANIC) . South Australia: Brookfield Conservation Park at 34°19ʹS 139°30ʹE, 4-20 Feb 1992, J. Stelman and S. Williams (1 ♀, ANIC; 1 ♂, CAS) ; 14 km WNW Renmark at 34°07ʹS 140°37ʹE, 28 Feb – 28 May 1995, K.R. Pullen (1 ♀, ANIC) ; 32 km N Renmark at 33°53ʹS 140°44ʹE, 9 Nov – 12 Dec 1995, K.R. Pullen (1 ♀, 1 ♂, ANIC) ; 79 km NNW Renmark at 33°31ʹS 140°24ʹE, 12 Dec 1995 – 25 Jan 1996, K.R. Pullen (1 ♀, ANIC; 1 ♀, CAS) . Western Australia: 11 km E Marble Bar at Brockman Creek at 21°09.0ʹS 119°51.7ʹE, 2-14 May 2003, M.E. Irwin and F.D. Parker (1 ♂, CAS) .

Figures

FIGURES 197–299. Pison bimbi Pulawski, sp. nov., female. (197) Clypeus and mandibles; (198) Head in dorsal view; (199) Pronotum in dorsal view. FIGURE 200. Collecting localities of Pison bimbi Pulawski, sp. nov.