Invreiella mesomexicana Waldren

Waldren, George C., Williams, Kevin A., Cambra, Roberto A. & Pitts, James P., 2020, Systematic revision of the North American velvet ant genus Invreiella Suárez (Hymenoptera: Mutillidae) with description of eleven new species, Zootaxa 4894 (2), pp. 151-205: 173-175

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Invreiella mesomexicana Waldren

sp. nov.

3. Invreiella mesomexicana Waldren   , sp. nov.

( Figs 11 View FIGURES 9–23 , 45, 52, 54 View FIGURES 41–54 , 67 View FIGURES 64–79 , 83 View FIGURES 80–94 , 98 View FIGURES 95–110 , 114 View FIGURES 111–125 , 128 View FIGURES 126–128 ; Map 3)

Diagnosis (female). This species is distinguished from other members of the I. australis   species-group by the following combination of characters: scrobe carina arcuate (figs 45, 83), genal process triangular with posterior genal carina weakly sinuate (figs 52, 67), lateral face of pronotum with few moderate punctures (figs 54, 114), integument of head orange, without patches of black integument (figs 11, 67, 128), and T2 with two light orange integumental spots that are slightly coalescing, with the remaining dorsal integument of T2 brown-red (figs 11, 128).

Description (female). Body length 12.57–13.34 mm (holotype metasoma extended on latter measurement (fig. 11)).

Head: Head 1.26–1.35 × as wide as mesosoma. Vertex and frons contiguously punctate. Antennal scrobe carina strongly arcuate, with inner tip of carina close to antennal rim. Frons not transversely recessed and concave below antennal scrobe carina, antennal rim consequently not recessed and is visible when head viewed laterally. Antennal rim apically microgranulate, tuberculate and protruding. F1 1.79–2.16 × as long as F2. Clypeus concave, with transverse arcuate carina complete, with small lateral tubercle ventrad to carina. Mandible acuminate. Distance from posterior margin of eye to posterolateral corner of head 1.39–1.43 × maximum diameter of eye. Genal process triangular, posterior genal carina weakly sinuate. Gena densely, contiguously punctate laterally, interpunctal space smooth. Postgena transversely rugose-striate.

Mesosoma: Mesosoma 0.99–1.15 × as wide as long. Dorsum and posterior face of mesosoma densely, contiguously punctate, surfaces coarse. Anterodorsolateral margin of pronotum outcurved. Pronotal carina prominent, glabrous, crenulate due to overlapping lateral punctures, visible both dorsally and laterally, not strongly protruding posteriorly in dorsal view and not entirely obscuring apical portion of pronotal-mesopleural suture. Tubercle anterior of propodeal spiracle obscure. Width of propodeum greater than distance between propodeal spiracles in dorsal view. Lateral face of pronotum mostly microgranulate with micropunctures, with cluster of moderate punctures at pronotal carina, remainder of lateral face with few scattered moderate punctures, lateral face posteriorly carinate along pronotal-mesopleural suture. Mesopleuron mostly microgranulate with micropunctures. Mesopleuron with vertical column of punctures weakly tuberculate, not forming anterior or posterior carinae. Mesopleuron posteriorly carinate along ventral half of mesopleural-metapleural suture, carina diverging from suture roughly at midpoint and terminating shortly after, dorsal portion of suture absent to obscure, present as faint groove. Metapleuron weakly rugose-striate just dorsad metacoxa, with few moderate punctures, medially with micropunctures, apically microgranulate and nearly glabrous. Metapleural-propodeal suture without overlapping striae. Lateral face of propodeum mostly glabrous, patchily microgranulate, with clusters of micropunctures, posteriorly with moderate scattered punctures. Coxae coarsely sculptured, with small to moderate punctures.

Metasoma: T1–5 densely, contiguously punctate. Visible portion of pygidial plate not obscured by setal hood granulate-rugose. S2 densely punctate, punctures large, interpunctal space smooth, basolateral concave area sparsely punctate, nearly glabrous between punctures. S3–6 densely punctate, coarsely microgranulate between punctures. Hypopygium with arcuate row of setae near apical margin, lateral setae longer than median setae.

Integument coloration: Mostly orange-brown, with two large, slightly coalescing, light orange maculae on T2, remaining brown-red to black: antennal rim, antenna, apical quarter of mandible, base of clypeus, base of coxae, trochanters, and apices of femora (latter three orange-brown in paratype), apical 1/3 and basal 1/3 of T2, and T6 including pygidial plate.

Pubescence: Frons ventrally with whitish setae, medially with few fuscous setae. Frons dorsally and vertex with mostly decumbent light orange setae, with scattered fuscous setae. Posterolateral corner of head with sparse triangular patch of fuscous setae. Mandible with dorsal and ventral longitudinal row of pale orange setae. Remainder of head with whitish setae. Pronotum dorsally with transverse band of black setae. Dorsum of mesosoma mostly covered with decumbent light orange setae, dorsolateral edges with sparse raised fuscous setae. Pronotum with dorsal transverse band of black setae, except area between epaulet and pronotal spiracle with whitish setae. Median patch of sparse black setae present apically at propodeal declivity. Remainder of mesosoma including legs with whitish setae (except tarsi with dense orange bristles). Anterior face of T1 with whitish setae. T1 apically fringed with moderately wide band of black setae medially, laterally fringed with whitish setae. T2 with decumbent light orange setae overlapping two coalescing light orange integumental maculae, remainder of dorsum of T2 with black setae surrounding maculae. Felt line of T2 and surrounding lateral area with whitish setae. T2 apically fringed with wide band of black setae medially, laterally fringed with whitish setae. T3 covered and fringed with whitish setae. T4 similar to T3 except with small patch of black setae medially. T5 mostly covered and fringed with black setae medially, laterally fringed with whitish setae. T6 with light orange setae surrounding pygidial plate, partially obscuring basal half. Remainder of metasoma with whitish setae.

MALE. Unknown.

Etymology: The specific epithet is derived from the Greek meso and Mexico in reference to this species occurring in middle Mexico.

Distribution: Mexico (Guanajuato, Jalisco, Nayarit, and Zacatecas).

Biogeography: Mexican transition zone (Sierra Madre Occidental province; Transmexican Volcanic Belt province); Nearctic region (Chihuahuan Desert province).

Host(s): Unknown.

Remarks: None.

Material examined ( I. mesomexicana   , 5♀).

Holotype: ♀ (0000035– EMUS) [left antenna mounted on point, with F5–10 missing], [label 1 (tan):] ROQUE / GTO [// label 2 (tan):] Suelo / 29.x.62 [// label 3 (tan):] R. Padilla [// label 4 (yellow):] LACM [// label 5 (red):] HO-LOTYPE ♀ / Invreiella mesomexicana   / Waldren, 2018 / GCW_HYM0000035 [// label 6 (white):] Invreiella   / cardinalis   / ( Gerstaecker ) 1874 / Det K.A. Williams 2012. [( MEXICO: Guanajuato: Roque, N of Celaya, [20.581°N 100.838°W], 29.Oct.1962, R. Padilla (1♀ –0000035– EMUS))] GoogleMaps  

Paratype: MEXICO: Nayarit: San Blas / Tepic , [21.518°N 105.075°W], Oct.1894, G. Eisen & F.H. Vaslit (1♀ –0000036– NMNH) GoogleMaps   .

Additional specimens (non-types, examined or referenced*): MEXICO: Jalisco: Guadalajara , [20.663°N 103.350°W], 06. Jul., McClendon (1♀ – MIUP) GoogleMaps   ; 09.Jul.1903 (1♀ – ANSP)   . Zacatecas: Moyahua de Estrada , [21.265°N 103.165°W], 07.Aug.1965, A.R. Gillogly (1♀ – DJBC *) GoogleMaps   .


Smithsonian Institution, National Museum of Natural History


Academy of Natural Sciences of Philadelphia