Ceraturgus (Ceraturgopsis) oklahomensis (Bromley)

Barnes, Jeffrey K., 2008, Review of the genus Ceraturgus Wiedemann (Diptera: Asilidae) in North America north of Mexico, Zootaxa 1766, pp. 1-45 : 34-37

Ceraturgus (Ceraturgopsis) oklahomensis (Bromley)

( FIGS 10 A, 11)

Ceraturgus oklahomensis Bromley, 1934: 225 .

Type material examined. Holotype, male, UNITED STATES: “ Caddo County, Okla., 16.IV.33, R. Dahms”, “ HOLOTYPE Ceraturgopsis oklahomensis Bromley ” [red label, handwritten], “SW Bromley Collection 1955”, USNM. Allotopotype, female, UNITED STATES, “Caddo Co, Okl, April 16, 1933, R. Dahms”, “Allotopotype, Ceraturgopsis oklahomensis Bromley ”, “A. E. Pritchard Collection, 1962” (red label, handwritten), USNM. Paratype, female, UNITED STATES, “Norman, Okla., 9.IV.1932, R. D. Bird”, PARATYPE, Ceraturgopsis oklahomensis Bromley ” [red label, handwritten], SW Bromley Collection 1955”, “Ceratrugopsis oklahomensis Bromley Det. S. W. Bromley 1934 ”, USNM.

Additional material examined. UNITED STATES. OKLAHOMA. Cleveland County: Norman, 11 April 1932, ɗ, R. D. Bird, USNM. Grady County: Verden, 22 April 1934, ɗ, R. Dahms, CUIC. Payne County: 12 April 1925, Ψ, W. J. Brown, USNM. Payne County: Ripley, 21 April 1934, ɗ, Ψ, A. E. Pritchard, BMNH; 5 ɗ, Ψ, A. E. Pritchard, CAS; ɗ, Ψ, A. E. Pritchard, CSCA; ɗ, A. E. Pritchard, CUIC; ɗ, Ψ, A. E. Pritchard, FSCA; ɗ, A. E. Pritchard, JSUC; ɗ, Ψ, A. E. Pritchard, MCZ; 15 ɗ, 7 Ψ, A. E. Pritchard, USNM; 2 Ψ, A. E. Pritchard, OSEC; 6 June 1934, ɗ, A. E. Pritchard, USNM. Payne County: Stillwater, 29 April 1932, Ψ, W. D. Davis, USNM; 21 April 1934, 2 ɗ, 2 Ψ, A. E. Pritchard, AMNH. Woods County: 2 May 1936, sex unknown, R. Kaiser, OSEC. Woodward County: 9.6 km NE of Woodward, on Pyrropapus grandiflorus , 12 May1984, Ψ, J. Wenzel, R. Brooks, C. Michener, & D. Wahl, SEMC.

TEXAS. Blanco County: Pedernales Falls State Park, 16 April 1990, ɗ, 2 Ψ, A. Hook, BYU; 18 March 1994, ɗ, A. W. Hook, BYU. Montague County: Forestburg, 6 April 1941, 2 ɗ, Ψ, L. H. Bridwell, USNM; 10 April 1941, Ψ, L. H. Bridwell, USNM; 14 April 1941, ɗ, H. Bridwell, WSU; 14 April 1941, Ψ, L. H. Bridwell, USNM; 15 April 1941, Ψ, L. H. Bridwell, USNM; 18 April 1941, ɗ, L. H. Bridwell, USNM; 24 March 1942, ɗ, L. H. Bridwell, MCZ; 30 March 1942, 3 ɗ, L. H. Bridwell, USNM; 31 March 1942, 2 ɗ, L. H. Bridwell, AMNH; 31 March 1942, 2 ɗ, L. H. Bridwell, WSU; 31 March 1942, 2 ɗ, L. H. Bridwell, MCZ; 31 March 1942, 6 ɗ, 6 Ψ, L. H. Bridwell, USNM. Potter County: Wildcat Bluff, NW edge of Amarillo, 18 April 1997, ɗ, D. Sissom & A. Roberts, WTAM. Travis County: Austin, 14 March 1986, Ψ, J. Neff, BYU; 28 March 1993, ɗ, A. W. Hook, BYU; 11 April 1993, Ψ, A. W. Hook, BYU.

Male. Body length: 10.4–14.6 mm (mean ± S.D.: 12.2 ± 1.2; N = 18).

Head. Width 1.6 times eye height. Face white tomentose. Frons, vertex, ocellar tubercle, postcranium, and gena white pollinose; ocellar tubercle, narrow midfrontal area immediately below ocellar tubercle, and gena only thinly pollinose. Face with mystax of long white setae confined to lower half; upper face with shorter white setae reaching to antennal bases. Frons laterally with short, thin, white setae. Ocellar triangle tuberculate, with about 10–14 long white setae. Postocular setae white, many with proclinate apices. Postgena and stipes with dense vestiture of long, slender, apically crinkled, white hair-like setae. Proboscis dark brown or black, laterally compressed, about 3.3 times as long as deep, deepest near base, tapering to rounded apex. Palpal segments about equal in length, dark brown, both with long, pale hair-like setae. Antenna 2.7 mm long, dark brown or black; scape shining, with pale lateral setae along entire length; pedicel dull, with pale dorsolateral and ventrolateral setae at apex; flagellomeres dull; first flagellomere with conspicuous dorsal row of many short, pale, proclinate setae on basal half; antennomere:scape ratios 1.0:1.0:3.2:0.4:1.0.

Thorax. Cervical sclerites dark brown, sparsely white pollinose, with dense vestiture of long, slender, apically crinkled, white hair-like setae. Pronotum sparsely light golden pollinose, with dense pile of long, slen- der, apically crinkled, white setae covering antepronotum and with lateral patch of shorter, straight, white setae on postpronotum; postpronotal lobe thickly white pollinose, covered with long, slender, erect white setae. Propleuron white pollinose, with dense vestiture of long, declinate, white hair-like setae on proepisternum and reclinate hair-like setae on anterior portion of proepimeron. Prosternum thinly white pollinose, lacking setae. Scutum dark brown in ground color, with continuous, broad, white pollinose, lateral and posterior band extending from postpronotal lobe to postalar lobe and across prescutellar edge of scutum; with central brown vitta extending from pronotum nearly to scutellum, divided by thin brown pollinose vitta along midline, flanked anteriorly by short pale golden pollinose bands; with pair of broad posterolateral shining brown patches, divided by narrow line of white pollen along transverse suture, lightly dusted with brown pollen, reaching from behind postpronotal lobes almost to scutellum; completely covered with vestiture of short or long, erect or slightly reclinate pale setae; postsutural setae longer than presutural setae; lateral margin of scutum, in addition to several weaker setae, with 6–10 strong, pale presutural setae and 8–10 strong, pale postsutural, supra-alar setae. Postalar callus with short, pale hair-like setae laterally and long, strong, pale reclinate setae posteriorly. Scutellum black in ground color, sparsely white pollinose on disc and margin, with about 14 moderately strong, long, erect pale marginal setae, about as long as, or longer than, scutellum, and several marginal hair-like setae. Mediotergite shining black; anatergite thickly white pollinose; katatergite silvery pollinose with fan of long, slender, apically crinkled, white hair-like setae. Most mesopleural sclerites at least partly golden pollinose, but pollen sparse or lacking on lower anepisternum, lower katepisternum, lower and posterior anepimeron, and meron, these areas appearing shining or dull black. Posterior half of anepisternum covered with long, fine, pale, apically crinkled hair-like setae; dorsal setae declinate, ventral setae reclinate. Anterior basalare brown; posterior basalare pale pollinose. Katepisternum, anepimeron, katepimeron, and meron lacking setae. Basal swelling of pleural wing process white pollinose. Subalar sclerite brown. Metepisternum and metepimeron white pollinose; metepimeron with long, fine, apically crinkled, pale hair-like setae.

Legs. All segments shining dark brown or black in ground color. Coxae lightly dusted with white pollen. Prothoracic and mesothoracic coxae densely covered with long, slender, white, apically crinkled hair-like setae on anterior and lateral surfaces. Metathoracic coxa with similar hair-like setae anteroventrally and posterolaterally. All femora with circlets of several stout, pale setae near apex; prothoracic femur with 1 stout, white seta anteriorly near middle; mesothoracic femur with 2 stout, white setae anteriorly near middle; metathoracic femur with anterior row of 5–8 white bristles. Prothoracic tibia with anterodorsal and posterodorsal row of short pale setae and posteroventral row of long pale setae; mesothoracic tibia with anterodorsal and posteroventral rows of long golden setae and posterodorsal row of short, white setae; metathoracic tibia with dorsal, anterior and ventral rows of long pale setae. Length of first tarsomere longer than or equal to length of second and third combined. All claws black with golden brown base. All pulvilli pale yellowish brown.

Wing ( FIG. 10 A). 8.2–11.3 mm long (mean ± S.D.: 9.4 ± 0.9; N = 18). Hyaline throughout, except for some light infuscation along some veins and crossveins. Halter with stem and knob brown or brownish yellow.

Abdomen. Tergite 1 shining black in ground color; with posterior white pollinose band, narrow at midline, reaching to anterior margin laterally, with many long pale hair-like setae anterolaterally, many long, stout, pale setae posterolaterally. Tergites 1–5 shining black in ground color, with broad posterior white pollinose transverse band; bands not extending forward at lateral margins of tergites 2–5; each pollinose band usually complete, but sometimes anteriorly notched or interrupted at midline by narrow patch of brown pollen. Tergite 2 with many long, slender, pale hair-like setae laterally; tergites 3–6 with shorter, pale hair-like setae. Tergites 6–7 shining black. Sternites 1–7 shining black, with dusting of brown pollen and some long, slender, pale hairlike setae. Terminalia black, with many long pale hair-like setae.

Female. Similar to male.

Body length: 9.8–16.0 mm (mean ± S.D.: 12.6 ± 1.9; N = 12). Similar to male wing.

Head. Width 1.6 times eye height. Antenna 3.7 mm long; antennomere:scape ratios: 1.0:1.1:3.3:0.3:0.9.

Wing. 8.2–11.4 mm long (mean ± S.D.: 9.8 ± 1.1; N = 12).

Legs. All segments reddish brown to yellowish brown. All pulvilli pale yellow.

Abdomen. All tergites shining black or dark brown in ground color. Tergites 2–5 with broad posterior white pollinose transverse bands; bands often notched anteriorly at midline. Tergite 6–7 wholly shining black, lacking pollen. Sternites 1–8 shining black or dark brown, with light dusting of brown pollen and some long, slender, pale hair-like setae.

Distribution ( FIG. 11 ). Oklahoma and Texas.

Discussion. In males, the legs are usually dark brown and concolorous with the remainder of the body. In females, the legs are reddish brown to yellowish brown, and usually considerably lighter than the remainder of the body.

Hull (1962) illustrated the head, antenna, wing, and male postabdomen.

Most specimens have been collected from late March to late April.

Figures

FIGURE 10. Ceraturgus, right wing, dorsal view: A, C. oklahomensis, male; B, C, C. cornutus, male and female, respectively; D, E, C. johnsoni, male and female, respectively.

FIGURE 11. Distribution of Ceraturgus oklahomensis by county.