Pirhosigma abregoi Garcete-Barrett & Hermes, 2019

Ferreira, Wellington D., Hermes, Marcel G., Garcete-Barrett, Bolivar R. & Carpenter, James M., 2019, Two new species of Pirhosigma Giordani Soika (Vespidae, Eumeninae), with an updated catalog for the genus, Journal of Hymenoptera Research 71, pp. 225-240 : 226-227

Pirhosigma abregoi Garcete-Barrett & Hermes sp. nov.

Figs 1-6 , 7

Comments and diagnosis.

This is the only species of Pirhosigma that does not present a preapical fossa in T1 ( Fig. 5 ), which is present in all other species of this genus. However, this species presents all the other diagnostic features of Pirhosigma , such as the shape of T1, apically flask-shaped, with the apical lamella not preceded by a transverse swelling, and the basal portion with two laterally longitudinal carinae ( Giordani Soika 1978; Carpenter and Vecht 1991) ( Fig. 6 ). Pirhosigma abregoi differs from all other species of Pirhosigma by the following set of features: (i) absence of an evident preapical fossa on T1 ( Fig. 5 ); (ii) pronotal carina in the shape of an inverted “V” in frontal view ( Fig. 3 ), with a well-developed lateral lamella ( Fig. 4 ); (iii) T2 oval, longer than wide, with evident, deep and spaced punctures ( Fig. 7 ); (iv) lateral portion of the pronotum greatly shortened ( Fig. 4 ); (v) short clypeus, wider than long ( Fig. 2 ).

Description.

Holotype female.

Measurements.

Body length (from head to apex of T1): 5.5 mm; Forewing length (from mid tegula to apex): 6.07 mm.

Color.

Body with predominantly brown-yellowish tegument. Yellow head, with a wide oval black mark on the frons, connected to a narrow black band extending to the occiput; brownish mark in the center of the clypeus. Mesosoma and metasoma with predominantly brown-yellowish tegument. Antennae with brownish scape and pedicel; progressively darker flagellum from the base to the apex. Mesoscutum totally blackened. Scutellum with a central black-brown spot. Brownish propodeum. Black mark in the basal portion of T1. Yellow marks more prominent in the regions that follow: parategulae; apical margin of T1; lateral and apical margins of T2; apical margin of S1. Brown wings.

Structure.

Labrum truncated. Clypeus broader than long, with short and emarginated apex; small and not carinate apical teeth present. Interantennal region without cariniform elevation. Pronotal carina well developed in all its extension, in the shape of an inverted “V” in frontal view, with a well-developed lateral lamella. Lateral surface of pronotum narrow, with the distance between pronotal fovea and the mesepisternum smaller than the size of the fovea itself; pronotal fovea slit-shaped. Pretegular carina absent. Parategulae triangular. Sulcus between the scutellum and metanotum obsolete. T1 elongated, with basal portion longer than the apical portion; two lateral longitudinal carinae present, not reaching half of the segment; preapical fossa absent. T2 oval, longer than wide, with lamella well developed. S2 without abrupt basal elevation.

Sculpture.

Clypeus without evident punctation. Frons and vertex with deep, coarse and abundant punctures, with space between them smaller than the size of a puncture. Pronotum with granular punctation, with shallow, abundant and slightly thickened punctures, distance between them smaller than the size of a puncture. Mesespisternum with deep punctures, denser in its upper portion; shallow and slightly evident punctures in its lower portion. Mesoscutum, scutellum and propodeum with deep and coarse punctures. Apex of T1 with evident shallow punctation. T2 with well-marked deep punctation, distance between them smaller than the size of a puncture.

Pilosity.

Golden pubescence covering the entire surface of the body. Bristles shorter, thick and abundant on clypeus, frons, vertex, and mesosoma. Elongated, delicate and thin bristles in the metasoma.

Male.

Unknown.

Type material.

Holotype: PANAMA • 1 ♀; Peninsula Gigante, Barro Colorado Nature Monument; 30 Jul. 1990; A. Mena leg. (MIUP).

Type locality.

Peninsula Gigante: Barro Colorado Nature Monument; Panama.

Etymology.

This species is named after the Panamanian Biologist Jean Carlos Ábrego.

Figures

Figures 1 - 6. Pirhosigma abregoi Garcete-Barrett & Hermes, holotype female 1 habitus 2 head, frontal view 3 pronotum, frontal view, arrow pointing to the pronotal carina in the shape of an inverted " V " 4 pronotum, lateral view, arrow pointing to the well-developed lateral lamella in the pronotal carina 5 T 1, dorsal view, arrow pointing to the apical portion without a well-developed preapical fossa 6 T 1, lateral view, arrow pointing to the well-developed longitudinal carina. Scale bars: 1 mm (1); 0.5 mm (2 - 6).

Figures 7 - 12. Pirhosigma abregoi Garcete-Barrett & Hermes, holotype female 7 T 2 with an evident punctuation, dorsal view. Pirhosigma cambrai Garcete-Barrett & Ferreira, holotype female 8 habitus 9 head, frontal view 10 head, lateral view, arrow pointing to the curved clypeus apex 11 pronotum, dorsal view, arrow pointing to the well-developed dorsally pronotal carina 12 T 1, lateral view, arrow pointing to the well-developed longitudinal carina. Scale bars: 1 mm (8); 0.5 mm (7, 9 - 12).