Pison antennatum 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 : 57-60

Pison antennatum Pulawski , species nova

Figures 59 -68.

NAME DERIVATION.– Antennatum , a Latin neuter adjective derived from antenna, which is characteristically expanded basally in the male.

RECOGNITION. – Pison antennatum is all black (apical depressions of terga brownish, hindtibia narrowly ferruginous dorsally in one female examined), with three submarginal cells, the second recurrent vein interstitial with the second intersubmarginal vein or nearly so, and setae appressed on tergum I. It is further characterized by the straight setae of the lower gena and the presence of a conspicuously areolate sulcus adjacent to both the anterior and posterior margins of the metapleuron, i.e., on the posterior margin of the mesopleuron and on the anterior margin of the propodeal side ( Fig. 62 ). The latter feature is shared with P. auriventre and P. sulcatum .

The female can be recognized from similar species by a broad clypeal lamella, with a well defined, sharp corner (the distance between corners greater than the distance between a corner and the adjacent orbit) and a narrow clypeal lamella, as long mesally as laterally. The absence of psammophores on the gena and forefemur is a subsidiary recognition feature.

The male has flagellomeres III-V conspicuously convex ventrally and in addition sternum VIII with a narrow V- shaped impression subbasally ( Fig. 64 ), a transverse preapical carina, and a non-emarginate apical margin ( Fig. 65 ). Unlike auriventre , the gena is punctate and setose adjacent to the oral fossa.

because of differently oriented setae on each side); side slightly concave, either punctate (interspaces merging into fine ridges) or ridged (punctate between ridges); posterior surface conspicuously transversely ridged to conspicuously rugose. Hindcoxal dorsum with outer margin not carinate. Punctures of tergum I less than one diameter apart. Sterna finely, uniformly punctate throughout.

Setae silvery on head, thorax, and propodeum, appressed on frons, scutum, and tergum I, suberect on lower gena (longest setae about equal to midocellar diameter), forming dorsally oriented patch on each side of frons above dorsal end of middle carina but oriented ventrally below midocellus ( Fig. 61 ), completely concealing integument on clypeus except lamella. Tergal setae with golden tinge, forming fasciae on apical depressions.

Body all black, mandible ferruginous except black basally and apically.

♀.– Upper interocular distance equal to 0.78 × lower interocular distance; ocellocular distance equal to 1.2 × hindocellar diameter, distance between hindocelli equal to 1.7-1.9 × hindocellar diameter; eye height equal to 1.08-1.10 × distance between eye notches. Free margin of clypeal lamella only slightly convex, almost straight, with well-defined lateral corner ( Fig. 59 ); distance between corners greater than between corner and adjacent orbit. Dorsal length of flagellomere I 1.8-1.9 × apical width, of flagellomere IX 1.1-1.2 × apical width. Mandible: trimmal carina with small incision at about midlength. Tergum VI obtusely rounded. Length 7.1-8.0 mm; head width 1.9-2.1 mm.

♂.– Upper interocular distance equal to 0.84-0.88 × lower interocular distance; ocellocular distance equal to 1.5 × hindocellar diameter, distance between hindocelli equal to 2.0-2.1 × hindocellar diameter; eye height equal to 1.10-1.12 × distance between eye notches. Free margin of clypeal lamella acutely angulate ( Fig. 60 ). Flagellomeres III-V conspicuously convex ventrally, flagellomere VI shallowly concave basally ( Fig. 63 ). Dorsal length of flagellomere I 1.5-1.7 × apical width, of flagellomere X 1.2 × apical width. Sternum VIII not emarginate apically, with narrow V-shaped impression subbasally ( Fig. 64 ) and transverse carina preapically ( Figs. 65 ); area posterad of carina extremely finely punctate. Genitalia: Figs. 66, 67 . Length 6.8-7.2 mm; head width 1.8-1.9 mm.

GEOGRAPHIC DISTRIBUTION (Fig. 68).–

New South Wales, Queensland.

RECORDS.– HOLOTYPE: ♂, AUSTRALIA: New

South Wales: 1 km W Eumungerie at 31°56.7ʹS

148°36.9ʹE, 19 Dec 2009, V. Ahrens and W.J.

Pulawski (AMS).

PARATYPES: AUSTRALIA: New South Wales :

Burrendong Botanic Garden at 32°42.1ʹS

149°06.2ʹE, 13 Dec 2009, V. Ahrens and W.J.

Pulawski (1 ♂, CAS); same locality and collectors as holotype, 15 Dec 2009 (1 ♀, 2 ♂, CAS), 19 Dec

2009 (3 ♀, 2 ♂, CAS), 20 Dec 2009 (2 ♂, CAS) ;

Kinchega National Park at 32°23.7ʹS 142°22.7ʹE,

V. Ahrens and W.J. Pulawski, 17 Dec 2011 (2 ♀,

1 ♂, CAS), 18 Dec 2011 (1 ♀, 1 ♂, CAS), 19 Dec FIGURE 68. Collecting localities of Pison antennatum Pulawski , sp. nov

2011 (3 ♀, CAS), and 20 Dec 2011 (2 ♀, 1 ♂, CAS) .

Queensland: Emerald , 31 Dec 1986, H. and A. Howden (1 ♀, ANIC) .

Figures

FIGURES 59–63. Pison antennatum Pulawski, sp. nov. (59) Female clypeus and mandibles; (60) Male clypeus and mandibles; (61) Upper frons of female showing pair of setal patches; (62) Female metapleuron (arrow on each side of metapleuron shows foveolate sulcus); (63) Basal flagel- lomeres of male.

FIGURES 64–67. Pison antennatum Pulawski, sp. nov., male. (64) Sternum VIII (ventral surface); (65) Sternum VIII in oblique lateral view (arrow shows V-shaped impression); (66) Genitalia in dorsal view; (67) Genitalia in lateral view.