Traumatomutilla angustata ( André, 1906 )

Bartholomay, Pedro R., Williams, Kevin A., Cambra, Roberto A. & Oliveira, Marcio L., 2021, Revision of the Traumatomutilla gemella species-group (Hymenoptera, Mutillidae) with the description of its hitherto unknown males, Zoosystema 43 (1), pp. 1-28 : 5-9

Traumatomutilla angustata ( André, 1906)

( Figs 2-4 )

Ephuta (Traumatomutilla) angustata André, 1906: 43 .

Traumatomutilla angustata – Casal 1969: 286. — Nonveiller 1990: 75.

Traumatomutilla rastra Casal, 1969: 285 , n. syn.

TYPE MATERIAL. — Syntypes of M. angustata . Brazil • ♀; Brasilia [Brazil]; Rio Grande [do Sul]; id. 153106, Hym. coll.; HNHM • ♀; Bresil [Brazil]; Rio Grande do Sul; MNHN (examined) .

Holotype of T. rastra . Brazil • ♀; S. [Santa] Catarina, Nova Teutônia ; IV.1953, F. Plaumann leg.; AMNH_IZC 00323269 ; AMNH (examined).

ADDITIONAL MATERIAL EXAMINED. — Argentina • 1 ♀; Corrientes, Ituzaingo ; I.1985, M. A. Fritz leg. ; AMNH • 1 ♀; Entre Rios; 5.XII.1996 − 15.I.1997; L. Caire leg. ; MIUP • 1 ♀; Misiones, Puerto Esperanza ; X.1978; M. A. Fritz leg.; AMNH.

Brazil • 1♀; Rio Grande do Sul, Porto Alegre; CESC • 1 ♀; Santa Catarina, Nova Teutônia; MNCN • 2 ♀; XI.1968; F. Plaumann leg.; DGMC, PMNH • 1 ♀; Santa Catarina, Nova Teutônia ; 5.IV.1941; MNRJ .

DIAGNOSIS. — Female. In lateral view propodeum evenly convex throughout, dorsal face rounded into posterior face; lateral face of propodeum predominantly foveolate-punctate, most intervals smaller than foveolae diameter.

Male. Unknown.

DISTRIBUTION. Brazil (Rio Grande do Sul and Santa Catarina) and Argentina (Corrientes, Entre Rios, and Misiones).

DESCRIPTION

Female

Body length. 10-12 mm.

Head ( Figs 2A, C ; 3A, C ; 4A, C ). Posterior margin almost straight. Occipital carina conspicuously equally wide throughout. Vertex width 0.9 × pronotal width. Eye almost circular, its height in frontal view 1.5 × the distance from its ventral margin to mandibular condyle. Head sculpture partially obscured by dense setation, densely and coarsely foveolate-punctate with smooth rounded intervals where visible. Mandible with conspicuous subapical tooth. Ventral margin of clypeus raised and emarginated medially. Dorsal scrobal carina present, connected to lateral scrobal carina. Antennal tubercle finely, sparsely, and irregularly rugose to micropunctate. Flagellomere 1: 2.0 × pedicel length; flagellomere 2: 1.3 × pedicel length.

Mesosoma ( Figs 2A, C ; 3A, C ; 4A, C ). Dorsal thoracic length slightly longer than width. Mesosomal dorsum densely and coarsely areolate-punctate, with smooth rounded intervals and clear medial longitudinal carina from anterior margin of mesonotum to dorsal face of propodeum; carina less defined posterad. Anterior face of pronotum poorly defined, short, shorter than pronotal collar, vestigially and coarsely striated longitudinally with interspersed scattered punctures; dorsal face roundly angulate into anterior face in lateral view. Humeral carina well-defined, separated from well-defined raised epaulet, anterolateral corners of pronotum angulate in dorsal view. Pronotal spiracle almost flat against lateral margin of pronotum. Lateral face of pronotum densely foveolate-punctate; sculpture of mesopleuron and metapleuron completely obscured by dense setation, except smooth and unsculptured dorsal fourth of metapleuron. Lateral face of propodeum with sculpture densely foveolate-punctate, intervals smooth and shining predominantly less than width of surrounding sculpture. Ratios of widths of mesosoma at humeral angles, pronotal spiracles, widest point of mesonotum, narrowest point of mesonotum and propodeum immediately posterior to propodeal spiracles, 64:76:71:52:50. Lateral margin of mesonotum inconspicuously constricted anterior to propodeal spiracle, slightly diverging anterad. Propodeal spiracle slightly pronounced from lateral margin of mesosoma; post-spiracular area indistinguishable. Scutellar scale and anterolateral carinae absent; scabrous intervals absent on scutellar area. Propodeum conspicuously elongate, dorsal face much longer than and poorly differentiated from posterior face.

Metasoma ( Figs 2A, C ; 3A, C ; 4A, C ). Ratios of width of T1, width of T2 and length of T2, 30:67:66. Disc of T2 densely and coarsely foveolate-punctate to punctate with dense interspersed micropunctures; foveolae sparser and micropunctures absent laterally and over integumental spots. T3–6 sculpture, except pygidial plate, predominantly concealed by dense setation, sparsely and coarsely foveolate-punctate to simply punctate with dense interspersed micropunctures where visible; pygidial plate broadly subpyriform, defined by strong, projected, flange-like lateral carinae at apical fourth of plate; surface mostly irregularly rugose; interstice apparently granulose. S1 sparsely punctured, surface wedge-like, ending in a rounded longitudinal carina, equally high throughout. S2 densely foveolate-punctate, punctures slightly sparser posterad; anteromedial crest-fold almost absent. S3–6 densely and coarsely foveolate-punctate with sparse micropunctures at S3–4; sculpture denser on S6.

Male

Unknown.

Coloration and variations

Female ( Figs 2A, C ; 3A, C ; 4A, C ). Integument black to brownish-black except for mandibles and antennal flagella partially reddish-brown, and T2 with a pair of large subcircular orange to reddish integumental spots. Body setae predominantly silvery-yellow to golden varying in density, except for the following areas with black to brownish-black setae varying in density: gena, malar space, and ventral half of frons; pronotal dorsum, anterior half of mesonotum, propodeal dorsum medially, and femora apicodorsally; T1 medially, disc of T2 (except over integumental spots), fringe of T2 medially, fringe of T3–4 sublaterally (medial area of silvery-golden setae on T3 sometimes greatly reduced), fringe of T5 laterallly, and S6. Vertex with or without a medial spot of silvery-yellow setae.

Male. Unknown.

REMARK

Traumatomutilla angustata specimens have a single inconspicuous difference in relation to specimens of T. diophthalma which is the propodeum somewhat simply sloping posterad in lateral view ( Figs 2C ; 3C ; 4C ) as opposed to the more angulate propodeum of T. diophthalma ( Fig. 7B ). This propodeal structure is also seen in T. rastra , which differs from T. angustata by having the transverse band of silvery setae on the vertex reduced to a medial spot; the longitudinal setae markings of the mesonotum are linear instead of oblique as in T. angustata ; and the fringe of T3 has medial spot of silvery setae instead of being completely black as in T. angustata . Such characters have been revealed as polymorphic within other Traumatomutilla species ( Bartholomay et al. 2019a). The remaining structural features of T. angustata (including T. rastra n. syn.), are identical to those of T. diophthalma .

;

Since the few differences between T. angustata and T. rastra are restricted to minor color and setae characters which are highly variable within Traumatomutilla , we propose T. rastra as a junior synonym of T. angustata .

Figures

FIG. 2. — Traumatomutilla angustata (André, 1906), female, syntype, Brazil, Rio Grande do Sul, HNHM: A, dorsal habitus; B, type labels; C, lateral habitus. Scale bars: 2 mm. Photos: T. Németh.

FIG. 3. — Traumatomutilla angustata (André, 1906), female, syntype, Brazil, Rio Grande do Sul, MNHN: A, dorsal habitus; B, type labels; C, lateral habitus. Scale bars: 2 mm. Photos: P. R. Bartholomay.

FIG. 4. — Traumatomutilla rastra Casal, 1969 n. syn., female, holotype, Brazil, Santa Catarina, Nova Teutônia, AMNH: A, dorsal habitus; B, type labels; C, lateral habitus. Scale bars: 2 mm. Photos: Steve Thurston.

FIG. 7. — Traumatomutilla diopthalma (Klug, 1821), female, Brazil, Bahia, ZMB: A, dorsal habitus; B, lateral habitus; C, type labels. Scale bars: 2 mm. Photos: P. R. Bartholomay.