Bimaculatilla Turrisi & Matteini Palmerini

Turrisi, Giuseppe Fabrizio, Palmerini, Maurizio Matteini & Brothers, Denis J., 2015, Systematic revision and phylogeny of the genera Blakeius Ashmead, 1903 and Liomutilla André, 1907, with description of two new genera (Hymenoptera: Mutillidae, Myrmillinae), Zootaxa 4010 (1), pp. 1-78 : 29-30

Bimaculatilla Turrisi & Matteini Palmerini , gen. nov.

Type species. Myrmilla invreai Suárez, 1958 , present designation.

Etymology. The generic name is derived from the Latin noun “ macula ” (a marking) with the prefix “ bi -“ (two) and the suffix “- tilla ” (commonly used in Mutillidae ), and refers to the presence of two setal spots on T2; gender feminine.

Diagnosis. ♀. Supra-antennal tooth absent; frontal carina touching inner margin of eye; antennal rim mostly concealed within the frons, not visible dorsally; gena (lateral view) convex, bulging, not angulate, without toothlike process; mandible with inner apical tooth strongly curved; T2 with two weakly defined whitish spots of pubescence (setae moderately dense and partly erect) disposed transversely; spots far from anterior margin of T2, about in the middle of T2.

♂. Head moderately convergent toward occipital margin; longitudinal frontal furrow present; ocelli reduced; mandible with inner apical tooth strongly curved; notaulus and parapsidal line absent; tegula reduced but distinguishable; fore and hind wings reduced to narrow flap; T2 with two weakly defined (setae moderately dense and partly erect) whitish spots of pubescence disposed transversely; S8 with sides subparallel, without tooth-like process; genital capsule with cuspis of volsella elongate, finger-shaped, apex regularly rounded, weakly convex to flat toward apex, ending about at mid length of paramere harpe, with a weak longitudinal carina; digitus of volsella much shorter than cuspis, about half its length; midventral process of penis valve present, elongate and strongly curved.

Description. ♀. Head mostly blackish, sometimes lighter with antennal rim concolorous with rest of head ( Figs 15 A, 15B, 15C); mesosoma reddish orange, with lateral and ventral parts extensively dark brown to blackish ( Fig. 14 B); metasoma entirely blackish; integument of body coarsely sculptured, dull; head regularly rounded behind eyes, with dense and coarse punctures, without whitish setal spot on vertex and occiput ( Fig. 15 A); supraantennal tooth absent ( Fig.15 A); antennal rim mostly concealed within frons, not visible dorsally ( Fig. 15 A); A1 without ventro-lateral carina; A3 less than or at most twice length of A2; frontal carina touching inner margin of eye; postgena (behind oral fossa) convex (15E); occipital margin straight; occipital carina as narrow rim; gena (lateral view) convex, bulging, not angulate, without tooth-like process ( Fig. 15 B); genal carina absent; clypeus not prominent, wider than high, anterior margin wide, slightly concave with lateral tooth-like projection ( Fig. 15 D); oral fossa wider than long, roughly V-shaped ( Fig. 15 E); mandible with inner apical tooth strongly curved ( Fig. 15 D); mandible with inner basal tooth ( Fig. 15 D); pronotum about as wide as propodeum ( Fig. 14 A); pronotum with epomial carina well developed, close to pronotal spiracle; fore coxa without distal tooth-like process; mid tibia with 6–7 dorsal pre-apical spines arranged in two rows; hind tibia with 5–7 dorsal pre-apical spines arranged in two rows; T2 with two weakly defined (setae moderately dense and partly erect) whitish spots of pubescence disposed transversely, spots far from anterior margin of T2 (distance between spots and anterior margin more than diameter of each spot) ( Figs 14 A, 14B); T3 and T4 with broad pubescent band, entire ( Fig. 14 B); S6 flat.

♂. Head mostly blackish, sometimes lighter, with antennal rim concolorus with rest of head ( Figs 15 F, 15G, 15H); mesosoma reddish orange, with lateral and ventral parts extensively dark brown to blackish ( Fig. 14 D); metasoma entirely blackish; integument of body coarsely sculptured, dull; head moderately convergent posteriorly ( Fig. 15 F), with dense and coarse punctures; A1 without ventro-lateral carina; A3 shorter than A4; ocelli reduced ( Fig. 15 F); longitudinal frontal furrow present; occipital carina (lower part) as narrow rim ( Fig. 16 A); clypeus not prominent, wider than high, anterior margin wide, moderately concave with lateral tooth-like projection ( Fig. 15 J); oral fossa wide (width more than length) ( Fig. 16 A); mandible with inner apical tooth strongly curved ( Fig. 15 I); pronotum with sides subparallel ( Fig. 16 B); posterior margin of pronotum V-shaped ( Fig. 16 B); pronotum, median length less than half lateral length (pronotum short) ( Fig. 16 B); mesoscutum flat; notaulus and parapsidal line absent ( Fig. 16 B); transscutal suture well developed, evident ( Fig. 16 B); tegula subcircular, reduced but distinguishable ( Fig. 16 B); fore and hind wings reduced narrow flap ( Fig. 16 B); mesoscutellum well defined ( Fig. 16 B); metascutellum reduced ( Fig. 16 B); anterior metanotal carina well raised; posterior metanotal carina inconspicuous; propodeum (lateral view) abruptly truncated ( Fig. 14 D), as wide as pronotum (lateral view) ( Fig. 14 C); mesopleuron strongly convex, strongly rugose-punctate, width of upper part less half width of lower part; mid tibia with 2–3 dorsal pre-apical spines; hind tibia with one dorso-lateral pre-apical spine; T1 transverse ( Fig. 14 C); T2 with two weakly defined (setae moderately dense and partly erect) whitish spots of pubescence disposed transversely, spots far from anterior margin of T2 (distance between spots and anterior margin more than diameter of each spot) ( Figs 14 C, 14D); T3 and T4 with broad pubescent band, entire ( Figs 14 C, 14D); S2 with medial padlike process; S8 with sides subparallel ( Fig. 17 D), without tooth-like process ( Figs 17 D, 17E); genital capsule with cuspis of volsella elongate, finger-shaped, apex regularly rounded, weakly convex to flat toward apex, ending about at mid length of paramere harpe, with weak longitudinal carina ( Figs 17 A, 17B, 17C); digitus of volsella much shorter than cuspis, about half its length ( Figs 17 A, 17C); midventral process of penis valve present, elongate and strongly curved.

Species included. Bimaculatilla invreai (Suárez, 1958) , comb. nov.

Distribution. Western Mediterranean basin ( Spain and Morocco) ( Fig. 36 ).

Figures

FIGURE 14. Bimaculatilla invreai, habitus in dorsal and lateral views: (A – B) ♀; (C – D) ♂. Scale bars = 1.0 mm.

FIGURE 15. Bimaculatilla invreai, ♀ (A – E) and ♂ (F – J): (A, F) head, dorsal view; (B, G) head, lateral view; (C, H) head, frontal view; (D, I) mandible; (E) head ventral view; (J) clypeus. Scale bars = 0.5 mm.

FIGURE 16. Bimaculatilla invreai, ♂: (A) head, ventro-lateral view; (B) mesosoma, dorsal view. Scale bars = 0.5 mm (A); 1.0 mm (B).

FIGURE 17. Bimaculatilla invreai, ♂: (A – C) genital capsule: (A) dorsal view; (B) lateral view; (C) ventral view; (D – E) S 7 – S 8: (D) ventral view; (E) lateral view. Scale bars = 0.5 mm.

FIGURE 36. Distributions of species of Blakeius and Bimaculatilla, according to the material examined and selected and checked literature data.