Maurilloides nigrisoma Pitts & Shimizu, 2021

Shimizu, Akira, Pitts, James P, Rodriguez, Juanita, Wahis, Raymond & Yoshimura, Jin, 2021, Systematics and convergent evolution in three Australian genera of Pepsinae spider wasps (Hymenoptera: Pompilidae), Austral Entomology 60 (2), pp. 301-316 : 9-10

publication ID 10.1111/aen.12530


persistent identifier

treatment provided by


scientific name

Maurilloides nigrisoma Pitts & Shimizu

sp. nov.

Maurilloides nigrisoma Pitts & Shimizu , sp. nov.

( Fig. 3 View Fig ) 489E-BD20-B2186B8DB7F6

Specimens examined

Holotype ♀ ‘ WESTERN AUSTRALIA; Karijini Natl Park, Dale Gorge Road ; malaise in large dry wash; 23.IV / 4.V.2003; M E Irwin, F D Parker; 668 m; 22°28.4′S, 118°32.6′E ( GPS)’ ( ANIC). GoogleMaps

Paratypes 2♀ Same data as holotype ( EMUS); 1♀ ‘ Australia Western Australia Tom Price, 36 km N, Hamersley Iron Rd 22°32.5′S, 117°37.2′E 610 m 23Apr–4 May 03 F.D.Parker, M.E.Irwin WA04 FDP69968’ ‘ Maurillus sp. 2 Det. Pitts 2016’ ‘VCE141’ ( EMUS). GoogleMaps



Body and legs wholly black; and gena, in profile, about half of eye width ( Fig. 3e View Fig ).



(Measurements of the holotype are given in parentheses.) Length: body 12.5–13.9 (13.5) mm; fore wing 9.3–10.8 (10.8) mm. Body and legs black. Apical two-thirds of mandible dark rufous. Following dark ferruginous: clypeus apically, labrum except apically, pronotum lateroventrally, and mid and hind tarsal claws. Following yellowish brown: labrum apically, flagellomeres 2–10 anteroventrally, palpi, fore tibial spur, fore tarsomere 5 and fore tarsal claw. Fore wings strongly infuscate but paler immediately exterior to SMC3 and discal cell 2 ( Fig. 3h View Fig ); hind wing similarly infuscate with narrow off-white streaks immediately posterior to vein Sc + R + Rs and along radial fold.

Pubescence mainly coppery, but silvery-white on lower frons laterally to antennal sockets, basal two-thirds of clypeus, gena, T1–4 posterolaterally, and S2 and 3 posterolaterally (sometime patches of silvery-white pubescence on metasoma absent). Setae scarce; coppery to dark brown setae sparsely on upper frons along inner orbits, vertex, clypeus, labrum, mandible, gena, pronotum, mesonotum, metanotum, propleuron (fairy dense), mesopleuron and metapleuron ventrally, coxae, trochanters, femora, T4–6 and metasomal sterna, those on vertex, labrum, mandible, propleuron, T6 and S6 long.

Head and vertex with minute dense punctures, together with larger sparse punctures.

Head 1.1–1.2 (1.2)× as broad as high ( Fig. 3a View Fig ). Frons except laterally to antennal sockets and below them, and vertex medially smooth and polished. MID 0.57–0.58 (0.57)× TFD. Frons with median sulcus faint or obsolete. Labrum truncate apically. Antennocular line barely inclined from antennal base to eye ( Fig. 3b View Fig ). Inner orbits convergent above, divergent below ( Fig. 3a View Fig ). UID:MID:LID = 8.2–8.5 (8.2):10:9.6–9.8 (9.8). POL:OOL = 1:0.59–0.73 (0.73). Clypeus 2.2–2.4 (2.4)× as wide as long; anterior rim not depressed but smooth. OOcD/ POD = 1.2–1.4 (1.4). Gena, in profile, 0.4–0.5 (0.4)× as broad as eye ( Fig. 3e View Fig ). Medial face of scape with several irregularly spaced punctures ( Fig. 3d View Fig ). Scape:pedicel:fl1:fl2 = 1.2:0.23– 0.27 (0.24):1:0.77–1.0 (0.87). Fl1 2.9–3.2 (3.2)× as long as wide, 0.55–0.58 (0.58)× UID.

Pronotum with posterior margin subangulate medially. Side of metanotum with several oblique striae. Metapostnotum 0.3–0.7 (0.4)× as long as metanotum at midline, weakly constricted medially with a few inconspicuous transverse striae and median groove. Propodeum in dorsal view 1.2–1.3 (1.3)× as wide as long; dorsum weakly and broadly elevated medially with coarse, strong, transverse rugae and median groove ( Fig. 3g View Fig ); sides parallel-sided; declivity with a few strong sparse rugae anterolaterally and fine, dense, arcuate rugae posteromedially.

Anterior bases of spines in middle row of hind tibia very slightly raised but scarcely serrate.

Fore wing as shown in Fig. 3h View Fig . Marginal cell removed from wing tip by 0.65–0.80 (0.80)× its own length. SMC2: SMC3 = 1:1.1–1.3 (1.2) on vein M, 1:0.61–0.70 (0.61) on vein Rs. SMC2 narrowed on vein Rs by 0.73–0.88 (0.88)× its length on vein M, receiving crossvein 1m-cu at basal 0.51–0.61 (0.61). SMC3 narrowed on vein Rs by 0.41–0.45 (0.44)× its length on vein M, receiving crossvein 2m-cu at basal 0.41–0.54 (0.50). Crossvein 2rs-m nearly straight. Hind wing crossvein rs-m nearly straight and oblique. Crossvein cu-a originating at or slightly posterior to point of separation of vein M + CuA.




Pilbara Region, Western Australia.


The species name is derived from the wholly black body.


Australia, Australian Capital Territory, Canberra City, CSIRO, Australian National Insect Collection


USA, Utah, Logan, Utah State University