Maurillus Smith, 1855

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 : 3-7

publication ID 10.1111/aen.12530


persistent identifier

treatment provided by


scientific name

Maurillus Smith, 1855


Maurillus Smith, 1855

Maurillus Smith, 1855: 170 (type species: Maurillus australis Smith, 1855 , by monotypy).

Species included

The genus includes two species, which occur in Australia: Maurillus argenticapitis Pitts & Shimizu , sp. nov. and M. australis Smith, 1855 .


This genus differs from other Australian ‘Ctenocerini’ sensu Evans (1972) by the following female features: clypeus much narrower than lower frons, truncate apically ( Figs 1a View Fig and 2a View Fig ); labrum fully exserted, directed backward at right angle to clypeus ( Figs 1b View Fig and 2b View Fig ); lower frons laterally to antennal sockets with deep depressions continuous with sublateral depressions of clypeus; vertex abnormally convex, extended far above eye tops and ocelli, distance from eye top to vertex crest, in profile, at least two-fifths of eye height ( Figs 1c View Fig and 2c View Fig ); scape unusual in structure ( Figs 1b,d View Fig and 2d View Fig ) with triangular or rectangular in cross-section, its apicomedial corner subacutely produced beyond origin of flagellum, with medial face flattened or concave, smooth and polished and lateral face strongly concave; gena in dorsal view very thick, roughly rectangular ( Figs 1d View Fig and 2e View Fig ); and pronotum with anterior face vertical, flattened and polished, forming right angle with disc ( Figs 1c View Fig and 2c View Fig ), and anterior margin of pronotal disc truncate, tuberculate submedially, depressed medially.



Medium-sized wasps, 15 to 20 mm in length. Colour black, occasionally partly dark ferruginous on head ( Fig. 2a View Fig ). Pubescence on body and legs black, coppery, silvery-white or golden, forming paired golden or silvery patches on T1–5 posterolaterally ( Figs 1e View Fig and 2f View Fig ). Mid and hind tibial spurs ivory-white. Wings uniformly infuscate, occasionally with paler spots or bands ( Figs 1f View Fig and 2g View Fig ).

Headnot wider than high. Vertex withsurface rather flattened ( Figs 1c View Fig and 2c View Fig ) and posterior margin, in dorsal view, broadly and shallowlyemarginate ( Figs 1d View Fig and 2e View Fig ). MID/TFD> 0.6; upper frons flattened and polished; lower frons medially sloping downward between antennal sockets. Ocellar triangle flat ( Figs 1d View Fig and 2e View Fig ). Posterior ocelli situated below level of eye tops ( Figs 1a View Fig and 2a View Fig ). Clypeus roundly elevated medially, depressed sublaterally, slightly inflexed upward laterally. Malar space short. Mandible long and broad with tooth subapically on inner margin and lamina delimited by fimbriate groove from major part on outer margin ( Fig. 2b View Fig ). Antenna short and slender. OOcD/POD> 2. Gena, in profile, at least as thick as eye, strongly narrowing above and below ( Figs 1c View Fig and 2c View Fig ). Uppermost portion of occipital suture situated immediately below vertex crest ( Fig. 1g View Fig ). Occiput large and strongly concave.

Pronotum with dorsum flattened and declivous ( Figs 1c View Fig and 2c View Fig ), in anterior view V-shaped emargination above; shoulder swollen ( Fig. 1d,g View Fig ). Mesoscutum flattened, not reflexed posterolaterally. Discs of scutellum and metanotum flattened at same level as mesoscutum. Propodeum short, rugose on both dorsum and posterior declivity, latter being flattened for reception of anterior face of T1, longer than dorsum, separated from dorsum by sharp carina ( Figs 1e View Fig and 2h View Fig ).

Legs relatively short. Fore femur thinner than mid femur. Fore tibial apex dorsally with short, stout, decurved spines medially and laterally ( Figs 1h View Fig and 2i View Fig ). Fore tarsomeres 2–4 combined much shorter than fore tarsomere 1 ( Fig. 1i View Fig ). Mid and hind tibia with three rows of short spines dorsally, not serrate ( Fig. 2j View Fig ). Tarsomere 5 of all legs without spines beneath. Tarsal claws unidentate ( Fig. 1j View Fig ).

T1 abruptly narrowing anteriorly with anterior face vertical and flat, fitting against propodeal declivity. Transverse groove on S2 well developed at about basal third of S2. Apical metasomal segments compressed laterally and bristly. S6 without median carina.
















Maurillus Smith, 1855

Shimizu, Akira, Pitts, James P, Rodriguez, Juanita, Wahis, Raymond & Yoshimura, Jin 2021


Smith 1855: 170

Maurillus australis

Smith 1855