Pison angustivertex 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 : 54-57

Pison angustivertex Pulawski , species nova

Figures 51 -58.

NAME DERIVATION.– Angustivertex is derived from two Latin words: angustus, narrow, and vertex; with reference to the narrow vertex of many specimens; a noun in apposition to the generic name.

RECOGNITION.– Pison angustivertex is an all black, small species (length 4.4-7.1 mm in female, 4.6-6.0 mm in male), with three submarginal cells, the second recurrent vein interstitial with the second intersubmarginal vein or nearly so, and setae appressed on terga. It differs from similar species except brachyceras by the following combination: setae of the lower gena appressed or nearly so, shorter than the midocellar diameter, the tegula not extending beyond the anterior margin of the axilla, mesopleural punctures less than one diameter apart, the propodeum without the longitudinal carina separating the side from the dorsum and the posterior surface and extending from the gastral socket area toward the spiracle, and the propodeal dorsum obliquely ridged (ridges becoming evanescent toward margin), punctate between ridges. Unlike brachyceras , the ocellocular distance of angustivertex is smaller than the distance between the hindocelli ( Fig. 54 ), the dorsal length of flagellomere I is 1.8-2.2 × apical width in the female and 1.6-2.0 × in the male, and the frontal punctures are minute ( Fig. 53 ). In brachyceras , the ocellocular distance is greater than the interocellar distance, the dorsal length of flagellomere I is 1.5-1.7 × apical width in the female and 1.4-1.5 × in the male, and the frontal punctures are larger.

DESCRIPTION.– Frons dull, minutely punctate, punctures less than one diameter apart ( Fig. 53 ), middle supraantennal carina shorter than midocellar diameter, present only shortly above antennal insertion, more dorsally replaced by minute sulcus. Gena narrow in dorsal view ( Fig. 54 ). 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 fine, averaging about one diameter apart; interspaces miscrosculptured, dull. Tegula not enlarged. Mesopleural punctures fine, inconspicuous except well defined in female from 10 km W Cobra, Western Australia, less than one diameter apart; interspaces microscopically areolate, dull. Postspiracular carina present, slightly shorter than midocellar diameter. Metapleural sulcus impressed between dorsal and ventral metapleural pits. Propodeum without longitudinal carina separating side from dorsum and posterior surface and extending from gastral socket area toward spiracle; dorsum obliquely ridged (ridges becoming evanescent toward margin), punctate between ridges; side somewhat irregularly ridged, punctate between ridges; posterior surface ridged, punctate between ridges. Hindcoxal dorsum with outer margin obtusely carinate. Punctures of tergum I fine, averaging about one diameter apart. Sterna punctate throughout.

Setae silvery, appressed on frons, thorax, and tergum I, inconspicuous on frons, oriented

♀.– Upper interocular distance equal to 0.75-0.77 × lower interocular distance; ocellocular distance equal to 0.3-0.5 × hindocellar diameter, distance between hindocelli equal to 1.0-1.2 × hindocellar diameter (but 1.0 and 1.5, respectively, in specimen from 10 km W Cobra, Western Australia); eye height equal to 1.08-1.12 × distance between eye notches. Free margin of clypeal lamella obtusely angulate ( Fig. 51 ). Dorsal length of flagellomere I 1.8-2.0 × apical width, of flagellomere IX 1.2-1.5 × apical width. Mandible: trimmal carina with small incision shortly beyond midlength. Length 4.4-7.1 mm; head width 1.2-1.9 mm.

♂.– Upper interocular distance equal to 0.60-0.78 × lower interocular distance; ocellocular distance equal to 0.7-0.8 × hindocellar diameter, distance between hindocelli equal to 1.0-1.1 × hindocellar diameter; eye height equal to 1.02-1.06 × distance between eye notches. Free margin of clypeal lamella obtusely angulate ( Fig. 52 ). Dorsal length of flagellomere I 1.6-2.2 × apical width, of flagellomere X 1.0-1.1 × apical width. Sternum VIII with apical margin broadly emarginate ( Fig. 55 ). Genitalia: Figs. 56, 57 . Length 4.9-6.0 mm; head width 1.5-1.6 mm.

GEOGRAPHIC DISTRIBUTION (Fig. 58).– Australian Capital Territory, Queensland, South Australia, Western Australia.

RECORDS.– HOLOTYPE: ♀, AUSTRALIA: Queensland: Coen at 13°57ʹS 143°12ʹE, 20 Oct – 16 Nov 1993, P. Zborowski and M. Horak ( ANIC).

PARATYPES: AUSTRALIA: Australian Capital Territory: Black Mountain at 35°16ʹS 149°06ʹE, Feb 1982 , I.D. Naumann, J.C. Cardale, and M.E. Matthews (1 ♀, ANIC), Feb 1982 , J.R.T. Short and C. Tidemann (1 ♀, ANIC), Mar 1982 , I.D. Naumann and J.C. Cardale (2 ♀, ANIC), Nov 1982 , I.D. Naumann and J.C. Cardale (1 ♀, 2 ♂, ANIC), Dec 1982 , I.D. Naumann and J.C. Cardale (1 ♀, ANIC), 2 Jan 1987 , I.D. Naumann (1 ♀, ANIC), and 4-10 Dec 1987 , M.I. Irwin (1 ♀, CAS), and D.H. Colless , 30 Nov – 20 Dec 1979

(1 ♀, ANIC), 4-17 Feb 1980 (1 ♂, ANIC) ,

18-29 Feb 1980 (1 ♀, ANIC) , 15-31 Mar 1980 (2 ♀,

ANIC). Queensland: 7 km S Batavia Downs at

12°43ʹS 142°42ʹE, 24 May–17 June 1993,

P. Zborowski and I.D. Naumann (1 ♀, ANIC); 3 km

W Batavia Downs at 12°40ʹS 142°39ʹE, 16 Feb–

8 Mar 1993, I. Cunningham (1 ♂, CAS); Cockatoo

Creek Crossing 17 km NW Heathland at 11°39ʹS

142°27ʹE, 7 June – 25 July 1992, P. Zborowski and

E. Nielsen (1 ♀, ANIC); Edungalba, 1 Jan 1987 ,

H. and A. Howden (1 ♀, ANIC); 24 km NNW

Heathlands at 11°33ʹE 142°28ʹE, 19 June 1993, I.D.

Naumann and P. Zborowski (1 ♀, CAS); 12 km SSE

Heathlands at 11°51ʹS 142°38ʹE, P. Feehney, 26 Jan

– 1 Mar 1992 (1 ♂, ANIC) and 22 Mar – 25 Apr FIGURE 58. Collecting localities of Pison angustivertex 1992 (1 ♀, ANIC); Homevale National Park at Pulawski, sp. nov .

21°26.9ʹS 148°32.4ʹE, V. Ahrens and W.J. Pulawski,

27 Nov 2012 (1 ♀, CAS); 14 km NW Hope Valley Mission at 15°16ʹS 144°59ʹE , 8-10 Oct 1989, J.C. Cardale (1 ♀, ANIC). South Australia: Aroona Ruins in Flinders Ranges National Park at 31°17ʹS 138°35ʹE , 9 Nov 1987, I.D. Naumann and J.C. Cardale (2 ♀, ANIC); Gammon Ranges National Park at 30°24ʹ57ʺS 139°10ʹ06ʺE , 20-23 Oct 1999, Flinders Range Survey (2 ♀, SAM); Mitcham, a southern suburb of Adelaide , 17 Nov 1979, R.Y. Southcott (1 ♀, SAM); 2 km SSW Spring Mount at 35°27ʹ26ʺS 138°31ʹ54ʺE , 6-10 Mar 1998, S.E.G. Flerieu (1 ♀, SAM); Wilpena in Flinders Ranges National Park at 31°31.7ʹS 138°36.2ʹE, V. Ahrens and W.J. Pulawski , 21 Dec 2010 (2 ♀, CAS) and 27 Jan 2011 (1 ♀, CAS); 3 km ENE Wilpena at 31°31.0ʹS 138°36.6ʹE , 26 and 27 Jan 2011, V. Ahrens and W.J. Pulawski (2 ♀, CAS); Wilpena Pound Gap at 31°33ʹS 138°36ʹE , 5-6 Nov 1987, I.D. Naumann and J.C. Cardale (1 ♂, ANIC). Western Australia: 10 km W Cobra Station 24°10.2ʹS 116°23.0ʹE , 26 Apr – 10 May 2003, M.E. Irwin and F.D. Parker (1 ♀, CAS); 82 km S junction with Karijini Drive on Great Northern Highway at 23°07.3ʹS 119°09.5ʹE , 23 Apr – 16 May 2003, M.E. Irwin and F.D. Parker (2 ♀, ANIC, USU) .

Figures

FIGURES 51–54. Pison angustivertex Pulawski, sp. nov. (51) Female clypeus and mandibles; (52) Male clypeus and mandibles; (53) Female frons; (54) Female head in dorsal view.

FIGURES 55–57. Pison angustivertex Pulawski, sp. nov., male. (55) Sternum VIII (ventral surface); (56) Genitalia in dorsal view; (57) Genitalia in lateral view.