Stilbopogon monveroensis Kimsey, 2021

Kimsey, Lynn S., 2021, A new species of Stilbopogon from the Monvero dunes of California (Tiphiidae, Hymenoptera), Journal of Hymenoptera Research 86, pp. 145-150 : 145

Stilbopogon monveroensis Kimsey sp. nov.

Figs 2-8

Diagnosis.

Stilbopogon monveroensis has the small ocelli (Fig. 3 ), single submarginal cell (Fig. 2 ), and short broad flagellomeres (Fig. 3 ) that characterize S. costaricaensis , and less so S. sonorensis and S. eurekaensis . The nasiform clypeus (Figs 3 , 4 ), small eyes, and finely sculptured propodeum (Fig. 6 ) are diagnostic for this species.

Description.

Male. Body (Figs 6 , 8 ); length 2.5-4.4 mm. Head: face (Fig. 3 ): clypeus with subrectangular medial projection, projection apex 1.0-1.1 midocellus diameter wide, appearing acute in profile (Fig. 5 ), apicomedial truncation 2.6-2.7 midocellus diameters wide in front view (Fig. 3 ); mandible with three apical teeth, preapical teeth subequal in length; gular carina simple; flagellomere I length 1.4-1.5 × breadth; flagellomere II 1.9-2.0 × as long as broad; interantennal distance 1.5 midocellus diameters wide; distance from midocellus to closest eye margin 5.8-6.0 midocellus diameters. Mesosoma: mesopleuron with punctures 2-4 puncture diameters apart; forewing with one submarginal cell; marginal cell small, more than 3 × as long as broad, widely separated from costal margin (Fig. 2 ); propodeum largely impunctate and smooth, with small medial patch of fine rugae. Metasoma: epipygium apicomedially truncate, with two sublateral carinae, each terminating in small tooth, apical surface forming an ovoid, slightly sunken medial area (Fig. 5 ); paramere gently tapering, apicoventral angle obtuse (Fig. 7 ). Color: body dark brown to black; antenna pale brown, slightly yellower than legs; wing veins pale brown to transparent, stigma brown; wing membrane untinted.

Female. Unknown.

Etymology.

This species is named after the site of collection in the Monvero Dunes.

Material examined.

Holotype male; USA: California, Fresno Co., Monvero Dunes, Monocline ridge, 29 km sw Mendota , 10 June 2015, 36.4974, -120.5312, 500 m, MT4 near Ephedra californica , M. Powers . Paratypes: 19 males: 6: same data as holotype; 6: MT1, 36°32'N, 120°33'W, 569 m, 10 June 2015, near Ephedra , M. Powers; 4: MT1, 36°32'N, 120°33'W, 7 July-8 August 2015, M. Powers; 1: 36.539, -120.567, 15-30 June 2015, MT1 near Ephedra californica , M. Powers; 3: 498 m, 17 July 2015, 498 m, 36°32'N, 120°33'W, MT2, Bohart Museum crew. All types are deposited in the Bohart Museum of Entomology , University of California, Davis .

Distribution.

This species has only been found in the Monvero Dunes in Fresno Co., California.

Remarks.

Most species of Stilbopogon appear to be quite widespread in arid and desert regions of North and Central America. Stilbopogon monveroensis appears to be the exception to this. However, its restricted distribution may be more the result of limited collecting than actual endemism.

Figures

Figures 2 - 8. Stilbopogon monveroensis male 2 fore and hindwing venation 3 front view of face 4 lateral view of head 5 dorsal view of epipygium 6 dorsal view of body 7 lateral view of male genital capsule 8 lateral view of body. Abbreviations: ae = aedeagus, p = parameres.