Pison abductor 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 : 36-37

Pison abductor Pulawski , species nova

Figures 1 -4.

NAME DERIVATION.– Abductor, a noun in apposition, with reference to the well developed abductor ridge of this species.

RECOGNITION.– Pison abductor can be recognized by the erect setae of tergum I combined with a well-defined abductor ridge. A subsidiary recognition feature is the sculpture of tergum I: the anterior declivity is covered with dense, microscopic punctures and markedly larger punctures several to many diameters apart.

DESCRIPTION.– Frons dull, finely punctate, punctures nearly contiguous. Occipital carina joining hypostomal carina. Gena narrow in dorsal view ( Fig. 2 ). Labrum not emarginate. Anteromedi- an pronotal pit transversely elongate, about as long as 1.5 × midocellar diameter. Scutum not foveate along flange, without longitudinal ridges adjacent to posterior margin; scutal punctures well defined, interspaces linear, unsculptured. Tegula enlarged. Mesopleural punctures well-defined, contiguous. Postspiracular carina present, slightly shorter than 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 obliquely ridged, with middle carina in shallow sulcus; side ridged, punctate between ridges; posterior surface conspicuously, transversely ridged, punctate between ridges. Hindcoxal dorsum with outer margin obtusely carinate, inner carina produced into medium size tooth basally. Inclined part of tergum I with dense, minute punctures and with much larger, much sparser punctures (several to many diameters apart); punctures of horizontal part about one diameter apart. Punctures of sternum II mesally conspicuous, many diameters apart apicomesally, of sterna III and IV 2-3 diameters apart along midline.

Setae silvery, both appressed and erect on upper frons, erect on postocellar area, scutum, and tergum I; on lower gena sinuous, 2 × as long as midocellar diameter; largely concealing integument on clypeus. Apical depressions of terga with silvery, setal fasciae.

Body all black, mandible with dark reddish area at about apical two thirds.

♀.– Upper interocular distance equal to 0.70 × lower interocular distance; ocellocular distance equal to 0.9 × hindocellar diameter, distance between hindocelli equal to 0.8 × hindocellar diameter; eye height equal to 0.90 × distance between eye notches. Free margin of clypeal lamella roundly arcuate ( Fig. 1 ). Dorsal length of flagellomere I 3.8 × apical width, of flagellomere IX 1.2 × apical width. Mandible: trimmal carina with small incision shortly beyond midlength; outer surface with well-developed abductor ridge ( Fig. 3 ). Tergum VI with median carina, carina about as long as midocellar diameter. Length 8.1 mm; head width 2.7 mm.

♂.– Unknown.

GEOGRAPHIC DISTRIBUTION (Fig. 4).– Known from one locality in the Kakadu National Park, Northern Territory.

RECORDS.– HOLOTYPE: ♀, AUSTRALIA: Northern Territory: Nourlangie Rock, now Burrunggui, in Kakadu National Park , 18 Oct 1972, E.F. Riek ( ANIC).

Figures

FIGURES 1-3. Pison abductor Pulawski, sp. nov., female. (1) Clypeus and mandibles; (2) Head in dorsal view; (3) Mandible in lateral view (arrow shows abductor ridge). FIGURE 4. Collecting locality of Pison abductor Pulawski, sp. nov.